question bank internal combustion engine

SUB-DISCIPLINE: INTERNAL COMBUSTION ENGINE

Chapter: General

History and Development of I.C. Engine

01.01 Thermal efficiency of I. C. engine is ….. than E. C. Engine.

a) Greater b) Less c) Same d) None

01.02. Weight to power ratio is less in ……………………….

a) E.C. Engine b) I.C. Engine c) Both a & b d) None

01.03. I.C. Engine is …………..acting.

a) Single b) Double c) Both a & b d) None

01.04. 4-stroke Diesel engine is an ……………………..

a) I.C. Engine b) E.C. Engine c) Both a & b d) None

01.05. I.C. Engine was invented in the year……………A.D.

a) 1860 b) 1876 c) 1892 d) 1872

01.06. Dr. Rudolf Diesel made the first Diesel engine in the year………AD.

a) 1860 b) 1876 c) 1892 d) 1888

Classification of I. C. Engine

01.07. Petrol engine is an example of ……………… ignition engine.

a) Spark b) Compression c) Both a & b d) None

01.08. Deutz engine Model BF12L 513C fitted on Plassermatic BCM is …… cooled.

a) Air b) Water c) Both a & b d) Oil

01.09. Cummins Engines fitted on Track Machines are ……………. cooled.

a) Air b) Water c) Both a & b d) Oil

01.10. KTA 1150 L engine is a ………………… engine.

a) 6 cylinder b) 12 cylinder c) 8 cylinder d) 18 cylinder

01.11. Kirloskar HA 694 engine fitted on PQRS is a ………… engine.


01.12.Deutz Engine Model BF 12L 513C is a ................... engine.


01.13. Stroke Length in Deutz engine model BF 12L 513C is …… cm.

a) 12 b) 5 c) 51 d) 13

01.14. Total displacement volume in Cummins Engine Model NTA-855 L is ……..

a) 855 mm3 b) 855 cm

3 c) 855 inch

3 d) 855 ft

3

01.15. In Cummins engine Model KTA 1150 L, the letter used for application code is

…..

a) K b) T c) A d) L

Chapter: General

Question Answer Question Answer Question Answer

01.01 a 01.06 c 01.11 a

01.02 b 01.07 a 01.12 b

01.03 a 01.08 a 01.13 d

01.04 a 01.09 b 01.14 c

01.05 a 01.10 a 01.15 d

Chapter: Constructional Details of I. C. Engine

02.01. Oil sump is generally made of …………………..

a) Cast Iron b) Aluminium c) Forged steel d) Copper

02.02. In 4-stroke engines minimum ………... Compression rings are used.

a) 0 b) 1 c) 2 d) 3

02.03. In 4-stroke engines minimum ………... oil control ring is used.

a) 0 b) 1 c) 2 d) 3

02.04 .Piston and connecting rods are connected by ……..

a) Circlip b) Rings c) Gudgeon pin d) Bush

02.05. Piston pin and crankpin of crankshafts are joined by ……..

a) Gudgeon pin b) Connecting Rod c) piston d) Rings

02.06. Small end of connecting rod is connected with ……………..

a) Piston b) Gudgeon pin c) Crank pin d) Camshaft

02.07. Center to centre distance between the crankpin and main journal is …… of the

piston stroke.

a) Same b) Half c) Twice d) Quarter

02.08. No. of teeth on camshaft gear is ……………. that of the nos. of teeth on

crankshaft gear.

a) Half b) Same c) Twice d) Thrice

02.09. Speed of camshaft is …………… to that of crank shaft.

a) Half b) Same c) twice d) Thrice

02.10. In Cummins engines ……… cams are on camshaft for each cylinder.

a) 1 b) 2 c) 3 d) 0

02.11. Normally inlet valves are made of ……. alloy steel.

a) Nickel chromium b) Silicon Chromium c) Both a and b d) None

02.12. Normally exhaust valves are made of ……. alloy steel.

a) Nickel chromium b) Silicon Chromium c) Both a and b d) None

02.13. Normally valve face angle is ………..

a) 00

b) 150

c) 450

d) 900

02.14. Push rod is fitted in between …………. and ……….

a) Cam, Tappet b) Adjusting Screw, Tappet

c) Valve, Cam d) Valve, Tappet

02.15. Ratio of No. of teeth on crankshaft gear to the P.T. pump gear is ………..

a) 1:1 b) 1:2 c) 1:1/2 d) 1/2:1

Chapter: Constructional Details of I. C. Engine


02.01 b 02.06 a 02.11 a

02.02 c 02.07 b 02.12 b

02.03 b 02.08 c 02.13 c

02.04 c 02.09 a 02.14 b

02.05 b 02.10 c 02.15 a

Chapter: Basic Terminology and Working Principle of I. C. Engine

Basic Terminology

03.01. The upper most extreme point beyond which piston cannot go in upward

direction is called ………

a) TDC b) BDC c) Clearance d) Stroke

03.02. The bottom most extreme point beyond which piston cannot go in downward

direction is called ………

a) TDC b) BDC c) Clearance d) Stroke

03.03. The complete movement of piston from TDC to BDC or vice versa is called

……

a) Stroke b) Stroke length c) Clearance d) Swept

03.04. The volume of cylinder above TDC is called …………

a) Clearance volume b) Swept Volume c) Stroke d) Bore

03.05. The volume of cylinder between TDC and BDC is called ……

a) Clearance volume b) Swept Volume c) Stroke d) Bore

03.06. Diameter of engine cylinder is known as ……………

a) Bore b) Clearance volume c) Swept volume d) Stroke Length.

Working Principle of 4-Stroke Diesel Engine

03.07. Inlet valve opens in ……………………... Stroke.

a) Suction b) Compression c) Power d) Exhaust

03.08. Diesel is injected at the end of …………… Stroke.


03.09. In four stroke Diesel engine, at the end of compression stroke, pressure raises

up to …………… bar.

a) 28 b) 180 c) 200 d) 300

03.10. In 4-stroke Diesel engine, at the end of compression stroke, the temperature

rises up to …………

a) 25000C b) 200

0C c) 250

0C d) 550

0C

03.11. Self ignition temperature of diesel is approximately ……… 0C.

a) 5500C b) 440

0C c) 2500

0C d) 200

0C

03.12. Both the valves remains closed at the end of ……… stroke.


03.13. In 4 stroke diesel engine, one working cycle gets completed in ….. revolutions

of crankshaft.

a) 1 b) 2 c) 3 d) 4

03.14. In 4 stroke diesel engine, one working cycle gets completed in ….. revolutions

of camshaft.

b) 1 b) 2 c) 3 d) 4

Working Principle of 2-Stroke Diesel and 2 & 4-Stroke Petrol Engine

03.15. 4-stroke Petrol engine works on ………….. cycle

a) Otto b) Diesel c) Carnot d) Dual

03.16. Piston moves from BDC to TDC in …… stroke.

a) Suction b) Compression c) Power d) None

03.17. In 4-stroke petrol engines at the end of compression stroke pressure rises up

to…. bar

a) 28 b) 8-13 c) 200-300 d) 14-20

03.18. Spark is given by the spark plug at the end of ………..Stroke

a) Suction b) Compression c) Power d) Exhaust.

03.19. In two stroke petrol engine lube oil is put in ……….

a) Petrol Tank b) Sump c) Crankcase d) None

03.20. In two stroke engines, one working cycle gets completed in …….. revolution

of crankshaft.

a) 1 b) 2 c) 3 d) 4

03.21. Spark plug is an essential component of …………… engine

a) Petrol b) Diesel c) Both a & b d) None

03.22. Injector is an essential component of …………… engine


03.23. Carburetor is an essential component of …………… engine


Combustion of Fuel

03.24. Specific gravity of high speed diesel is in the range of …….…

a) 0.82-0.92 b) 1.80-3.00 c) 4.5-5.00 d) 1.24-1.26

03.25. Minimum Cetane No. of H.S.D. is ………………………..…

a) 30 b) 35 c) 45 d) 60

03.26. As an impurity ………. Sulphur is available in High Speed Diesel.

a) 1% b) 0.5% c) 2% d) 3%

03.27. Incomplete combustion results in production of ………………………

a) CO b) CO2 c) C d) H2O

03.28. …. .. part of carbon mono-oxide in 10,000 parts of air is dangerous to breathe.

a) 1 b) 5 c) 15 d) 2

03.29. The time elapsed between the start of fuel injection and first appearance of

flame is called ….

a) Ignition delay b) Uncontrolled combustion

c) Before burning d) After Burning

03.30. Rapid and uncontrolled combustion starts at the end of ………………………

a) Ignition delay b) Controlled combustion

c) After burning d) Combustion

03.31. Maximum pressure in the combustion chamber is reached in the stage of

…………

a) Ignition delay b) Rapid & uncontrolled combustion

c) Controlled combustion d) After burning

03.32. Maximum temperature in the combustion chamber is reached in the stage

of…………….

a) Ignition delay b) Rapid & uncontrolled combustion

c) Controlled combustion d) After burning

Actual Working cycle of 4-stroke Diesel Engine

03.33. In actual working cycle of 4-stroke diesel engine …….valve opens in exaust

stroke.

a) Inlet b) Exhaust c) Injector d) None

03.34. In actual working cycle of 4-stroke diesel engine, both the valves remains

closed at the end of …………..stroke.

a) Suction b) Compression c) Exhaust d) None

03.35. Diesel is injected inside the engine cylinders at the end of ….. Stroke.


03.36. In actual working cycle of 4-stroke diesel engine, inlet valve opens … before

TDC.

a) 00-5

0 b) 5

0-10

0 c) 30

0-40

0 d) 35

0-50

0

03.37. In actual working cycle of 4-stroke diesel engine, inlet valve gets closed ……

after BDC.

a) 50-10

0 b) 35

0-50

0 c) 0

0-5

0 d) 35

0-50

0

03.38. In actual working cycle of 4-stroke diesel engine, diesel is injected just …

reaching the piston at TDC.

a) Before b) After c) On d) None

03.39. In actual working cycle of 4-stroke diesel engine, compression and expansion

takes place according to …………. Process.

a) Adiabatic b) Polytrophic c) Isothermal d) Isobaric

03.40. In 4-stroke petrol engine ……………is sucked during suction stroke.

a) Air b) Air petrol mixture c) Petrol d) Diesel petrol mixture

Deviations between actual and Theoretical Working cycles

03.41. In actual working cycle, suction takes place at ……………… atmospheric

pressure.

a) Less than b) Equal to c) More than d) None

03.42. In actual working cycle, inlet valve gets closed in ……………… stroke.


03.43. In actual working cycle, injection of fuel starts ………… before TDC in power

stroke.

a) 140-18

0 b) 35

0-50

0 c) 5

0-10

0 d) None

03.44. In actual working cycle, exhaust valve opens ………….. before BDC in power

stroke.

a) 140-18

0 b) 35

0-50

0 c) 5

0-10

0 d) None

03.45. In actual working cycle, exhaust valve gets closed …………. after TDC in

suction stroke.

a) 140-18

0 b) 35

0-50

0 c) 5

0-10

0 d) None

Firing Orders and VT Diagram

03.46. In Cummins engines, cylinders are counted from ………….. side.

a) Vibration damper b) Flywheel c) Both a & b d) None

03.47. Viewing from flywheel side, diesel engines rotate ……………

a) Clockwise b) Anticlockwise c) Both a & b d) None

03.48. In Deutz Engine Model BF 12L 513C, cylinders are counted from ………. side.

a) Vibration damper b) Flywheel c) Both a & b d) None

03.49. A-Bank and B-bank are designated in ………………. engine.

a) MWM b) Cummins c) Deutz d) Kirloskar

03.50. In MWM (Greaves) engine, inlet valve opens ……………… TDC.

a) 10 after b) 10

0 after c) 1

0 after d) 1

0 before

03.51. In MWM (Greaves) engine, fuel injection starts ………. TDC.

a) 100 before b) 10

0 after c) 1

0 after d) 1

0 before

03.52. Valve overlap in MWM (Greaves) Engine is …..….

a) 10

b) 20

c) 100

d) 350

Power flow in multi-cylinder engine

03.53. Power flow gap in 4-cylinder engine is ………………

a) 1200

b) 1800

c) 900

d) 3600

03.54. In a 4 cylinder engine when 1 No. cylinder is at the end of power stroke, 3 No.

cylinder will be at the end of …………… stroke.


03.55. In a 4 cylinder engine when 3 No. cylinder is in mid-suction stroke, 2 No.

cylinder will be in the mid ……… stroke.


03.56. Power flow gap in 6 cylinder engine is ………………….

a) 1200

b) 1800 c) 90

0 d) 360

0

03.57. Power stroke over lap in a 6 cylinder engine is ……………

a) 600

b) 1200

c) 1800

d) 900

03.58. In a 6 cylinder engine when 1 No. cylinder is at 1200 power stroke, 5 No.

cylinder will be at ………….. compression stroke.

a) 600

b) 1200

c) 1800

d) 900

Chapter: Basic Terminology and Working Principle of I. C. Engine

Question Answer Question Answer Question Answer Question Answer

03.01 a 03.16 b 03.31 b 03.46 a

03.02 b 03.17 b 03.32 c 03.47 b

03.03 a 03.18 b 03.33 a 03.48 b

03.04 a 03.19 a 03.34 b 03.49 a

03.05 b 03.20 a 03.35 b 03.50 a

03.06 a 03.21 a 03.36 b 03.51 a

03.07 a 03.22 b 03.37 b 03.52 b

03.08 b 03.23 a 03.38 a 03.53 b

03.09 a 03.24 a 03.39 b 03.54 b

03.10 d 03.25 c 03.40 b 03.55 c

03.11 b 03.26 a 03.41 a 03.56 a

03.12 b 03.27 a 03.42 b 03.57 a

03.13 b 03.28 c 03.43 a 03.58 c

03.14 a 03.29 a 03.44 b

03.15 a 03.30 a 03.45 c

Chapter: Air Supply System of Diesel Engine

04.01. Sufficient quantity of fresh air at NTP for complete combustion of 1 liter HSD

is …………

a) 12500 to 14500 ltr b) 1250 to 1450 ltr c) 200 to 300 ltr d) None

04.02. On Cummins engine ……………….. type air cleaner is used.

a) Oil bath b) Dry paper c) Both a & b d) None

04.03. On Kirloskar HA 694 engine …………….. type air cleaner is used.


04.04. On Deutz engine model BF 12L 513C ................... type of air cleaner is used.


04.05. On MWM TBD 232/234 engine ………….. type of air cleaner is used.


04.06. Only ……….. element of dry type air cleaner is cleaned.

a) Outer b) Inner c) Both a & b d) None

04.07. For cleaning dry type air cleaner, air pressure is applied from ……. to

…………

a) Inside, Outside b) Outside, Inside c) Both a & b d) None

04.08. For cleaning air cleaner of Cummins engines, air pressure should be …… bar.

a) 1.5 to 2.0 b) 2.0 to 3.0 c) 3.5 to 4.5 d) None

04.09. Nozzel dia for cleaning air cleaners should not be less than ………… mm.

a) 0.8 b) 0.6 c) 1 d) 3.5

04.10. Nozzel should remain approx ….. away from paper element.

a) 1” b) 2” c) 3” d) 0.5”

04.11. Supercharging is process of supplying air inside the engine cylinder at …...

than atmospheric pressure.

a) Less b) More c) Both d) None

04.12. Turbocharger is a supercharging device which runs by ……..

a) Exhaust gases b) Engine Gear-trains c) Both a & b d) None

04.13. Supercharger is a super charging device which runs by ……

a) Exhaust gases b) Engine Gear-trains c) Both a & b d) None

04.14. Turbocharger runs at ……… rpm.

a) 1000 b) 10000 c) 125000 d) None

04.15. Turbocharged engines should be run at idle for …… minutes before stopping.

a) 1 b) 2 c) 3-5 d) 0

04.16. After cooler is a device used to cool …….

a) Air b) Oil c) Fuel d) Water

04.17. After cooler is fitted …….. Turbocharger.

a) Before b) After c) In between d) None

04.18. Silencer is a ………… system component.

a) Air supply b) Fuel supply c) Lubricating d) Cooling

04.19. Turbocharger is fitted …………… after cooler.

a) Before b) After c) Both d) None

04.20. Air cleaner is fitted …….…. Turbocharger.

a) Before b) After c) Both d) None

04.21. Impeller of Turbocharger is at …………… side.

a) Fresh air b) Exhaust c) Both d) None

04.22. Turbo wheel of Turbocharger is at …………….. side.

a) Fresh air b) Exhaust c) Both d) None

04.23. Oil coming out from Turbocharger goes to …………..

a) Sump b) Oil gallery c) Oil cooler d) Filter

Chapter: Air Supply System of Diesel Engine


04.01 a 04.09 a 04.17 b

04.02 b 04.10 a 04.18 a

04.03 a 04.11 b 04.19 a

04.04 c 04.12 a 04.20 a

04.05 b 04.13 b 04.21 a

04.06 a 04.14 c 04.22 b

04.07 a 04.15 c 04.23 a

04.08 c 04.16 a

Chapter: Fuel Supply System of Diesel Engine

05.01. Liquid fuel is injected with compressed air in ………………… system

a) Air injection b) Solid injection c) Both a & b d) None

05.02. Only liquid fuel is injected and there is no need of compressed air in

……………… system


05.03. Mico-Bosch fuel supply system is a ……...… system.


05.04. Cummins P.T. fuel supply system is a …...… system.


05.05. In Mico-Bosch fuel supply system, fuel first passes through …………….

a) Cloth filter b) Paper filter c) Both a & b d) None

05.06. In Mico-Bosch fuel supply system, fuel is sucked from the diesel tank by ……

a) Fuel Feed pump b) Fuel injection pump c) Both a & b d) None

05.07. In Mico-Bosch fuel supply system, bleeding screws are provided on ……

a) Feed pump b) Injector c) Filter body d) None

05.08. Fuel injection pressure is ………………

a) 28 bar b) 180 bar c) 100 bar d) None

05.09. In Mico-Bosch fuel supply system leakage line starts from ………..

a) Feed pump b) Fuel injection pump c) Pump d) Injector

05.10. In Mico-Bosch fuel supply system relief valve and return line is provided on …

a) Feed pump b) Fuel injection pump c) Injector d) None

05.11. Bleeding Screw is provided to remove ………….

a) Air lock b) Lube Oil c) Water d) None

05.12. Hand priming pump is used in ………………………

a) Mico-Bosch fuel supply system b) Cummins PT Fuel Supply System

c) Both a & b d) None

05.13. Hand priming pump is used to force fuel when engine is to be ….

a) Started b) Stopped c) Both a & b d) None

05.14. Fuel feed pump is a ………………

a) Plunger Pump c) Rotary Pump c) Both a & b d) None

05.15. Fuel feed pump is a driven by ………………

a) Eccentric b) Cam c) Both a & b d) None

05.16. Primary filter is made of ……………………

a) Cloth b) Paper c) Both a & b d) None

05.17. Secondary filter is made of ……………………

a) Cloth b) Paper c) Both a & b d) None

05.18. Pre-filter is made of ……..

a) Cloth b) Paper c) Bronze Mesh d) None

05.19. Fuel injection pump is a ………..

a) Plunger Pump b) Rotary pump c) Both a & b d) None

05.20. 6-Cylinder FIP consists of ……… Nos. of plunger pumps.

a) 3 b) 6 c) 12 d) 13

05.21. Plunger pump in FIP is driven by ………………

a) Cam b) Eccentric c) Both a & b d) None

05.22. Metering of fuel is done in ……………

a) FIP b) Feed pump c) Injector d) None

05.23. Injection timing is maintained by ………….

a) Camshaft b) Delivery valve c) Injector d) Feed pump

05.24. In Mico-Bosch Fuel supply system Injector function is to ……..

a) Pressurize fuel b) Atomize & Vaporize c) Both a & b d) None

05.25. Injection pressure is set in ………….

a) Injector b) Feed pump c) FIP d) None

05.26. The abbreviation P.T. Stands for ……………

a) Pound-Time b) Pressure-Time c) Both a & b d) None

05.27. Ratio of P.T. pump speed to the crank shaft speed is ……………

a) 1 b) 2 c) 1:2 d) None

05.28. P.T. pump is a ………………..

a) Plunger pump b) Gear pump c) Both a & b d) None

05.29. In Cummins PT fuel supply system, diesel from the tank is drawn by

………………

a) Feed pump b) PT pump c) Both a & b d) None

05.30. Common rail pressure is 200-300 ………….

a) Bar b) PSI c) N/m2 d) None

05.31. The P.T. pump has ……………. delivery.

a) Single b) Multi c) Both a & b d) None

05.32. In Cummins P.T. fuel supply system injector plunger is actuated by……..

a) Fuel pressure b) Cam-mechanism c) Both a & b d) None

05.33. In Cummins P.T. fuel supply system injection pressure builds in ……

a) P.T. pump b) Injector c) Both a & b d) None

05.34. In Cummins P.T. fuel supply system, injector return is ……………

a) 80% b) 10% c) 20% d) 55%

05.35. In Cummins P.T. fuel supply system, Bleeding screw is fitted on ……………..

a) Filters b) P.T. pump c) Shut down valve d) None

05.36. In Cummins engine, fuel filter is of …………….

a) Paper b) Cloth c) Felt d) None

05.37. In Cummins P.T. fuel supply system water separator is fitted …… fuel filter.

a) Before b) After c) In between d) None

05.38. In Cummins P.T. fuel supply system N.R.V. is fitted just after …………….

a) Water separator b) Fuel filter c) Shutdown valve d) None

05.39. In PTG fuel pump ‘G’ stands for ……………………

a) Gear control b) Governor control c) Gate d) None

05.40. Filter screen (Mesh filter) is provided in ……………….…….

a) P.T. pump b) Injector c) Both a & b d) None

05.41. In Cummins P.T. fuel supply system, metering is done in …….…..

a) P.T. pump b) Injector c) Governor d) None

05.42. Cummins engines with drilled fuel passages will use …….... injector.

a) Flanged b) Cylindrical c) Both a & b d) None

05.43. Cummins engines equipped with fuel manifold will use …………….. injector.

a) Flanged b) Cylindrical c) Both a & b d) None

05.44. Fuel feed pump is a component of ……………….. fuel supply system.

a) Mico-Bosch b) Cummins PT c) Both a & b d) None

05.45. Hand priming pump is a component of …………….. fuel supply system.

a) Mico-Bosch b) Cummins c) PT d) None

05.46. N.R.V. is normally provided in ……………… fuel supply system.

a) Mico-Bosch b) Cummins c) Both a & b d) None

05.47. Pulsation damper is provided in ………………

a) PT pump b) Fuel injection pump c) Both a & b d) None

05.48. Plunger pump is provided in …………………

a) PT Pump b) FIP c) Both a & b d) None

05.49. Gear pump is provided in ………………

a) PT pump b) FIP c) Both a & b d) None

05.50. Delivery valve is provided in …………………


05.51. Screen Mesh filter is provided in ………………


05.52. Metering Orifice is provided in …………………..

a) Cummins injector b) Mico-Bosch injector c) Both a & b d) None

05.53. Most diesel fuel has cetane no. ……………..

a) 40 to 50 b) 200 to 300 c) 80-100 d) None

05.54. Cetane No. of α-Methyl Naphthalene is assigned as………..

a) 40 b) 50 c) 0 d) 100

05.55. Normal Heptanes is assigned octane no. as ……..

a) 0 b) 100 c) 40 d) 50

05.56. Sludge is a mixture of lubricating substance and …………..

a) Fuel b) Water c) Air d) None

05.57. Diesel Tank level should be kept almost …………… filled.

a) Half b) Full c) Three-Quarter d) None

05.58. In Diesel engines, air lock means for stopping of ……….. supply.

a) Fuel b) Air c) Oil d) Water

Chapter: Fuel Supply System of Diesel Engine


05.01 a 05.16 a 05.31 a 05.46 b

05.02 a 05.17 b 05.32 b 05.47 a

05.03 b 05.18 c 05.33 b 05.48 b

05.04 a 05.19 a 05.34 a 05.49 a

05.05 a 05.20 b 05.35 c 05.50 b

05.06 a 05.21 a 05.36 a 05.51 a

05.07 c 05.22 a 05.37 a 05.52 a

05.08 b 05.23 a 05.38 c 05.53 a

05.09 d 05.24 b 05.39 b 05.54 c

05.10 b 05.25 a 05.40 a 05.55 a

05.11 a 05.26 b 05.41 b 05.56 b

05.12 a 05.27 a 05.42 b 05.57 b

05.13 a 05.28 b 05.43 a 05.58 a

05.14 a 05.29 b 05.44 a

05.15 a 05.30 b 05.45 a

Chapter: Lubricating System of Diesel Engine

06.01. When a film of lubricating oil is imposed between the two surfaces, the friction

produced is called ……………

a) Solid friction b) Fluid friction c) Boundary friction d) None

06.02. The lube oil with ………….. viscosity variation is preferred.

a) Minimum b) Maximum c) Both a & b d) None

06.03 .The flash point of lube oil should be sufficiently……….

a) High b) Low c) Medium d) None

06.04. The pour point of lube oil should be …… than the lowest temperature

encountered in the engine.

a) Less b) More c) Equal d) None

06.05. Corrosion means destruction of a solid body by…….. action.

a) Chemical b) Mechanical c) Pneumatic d) None

06.06. A dispersant/detergent is added to the lube oil to………particles clotting.

a) Prevent b) Promote c) Both a & b d) None

06.07. Viscosity test of winter grade oil is done at ………

a) 00F b) -18

0F c) 210

0F d) 99

0F

06.08. Viscosity test of summer grade oil is done at ………

a) 00F b) -18

0F c) 210

0F d) 99

0F

06.09. SAE CF4 15W40 oil is meant for use up to………

a) -100C b) 0

0C c) -15

0C d) 40

0

06.10. Lube oil from turbocharger goes to ……

a) Oil gallery b) Sump c) Oil Cooler d) None

06.11. Lube oil from super bypass filter goes to ……

a) Oil gallery b) Sump c) Oil Cooler d) None

06.12. Oil from full flow filter goes to ……

a) Pressure regulator b) Oil Cooler c) Oil Pump d) None

06.13. Oil to main bearings comes from…… ……

a) Main Oil Gallery b) Connecting rod c) Both a & b d) None

06.14. Piston cooling pump draws oil from ………

a) Sump b) Full flow filter c) Oil Pump d) Super by pass filter

06.15. Lubrication system adapted in 2-stroke petrol engine is…….

a) Petroil system b) Splash system c) Pressure System d) None

06.16. A scoop is made in the lowest part of the connecting rod in …………. system

of lubrication.

a) Petroil system b) Splash system c) Pressure System d) None

06.17. Dry sump system is used in engines of ………

a) Road Vehicles b) Aeroplane c) Marine d) None

06.18. Lube oil pump is used in……..system of lubrication

a) Petrol b) splash c) Pressure d) Dry sump

06.19. Lube oil pump draws oil through the ….

a) Strainer b) Full flow filter c) Main oil gallery d) None

06.20. Oil pump used almost universally in engines …………

a) Gear pump b) Plunger pump c) Rotor pump d) Vane pump

06.21. A ………… valve is provided in many oil pumps.

a) Relief b) Unloader c) D.C. d) None

06.22. Strainer is attached at the……………of oil pump.

a) Inlet b) Outlet c) Both a & b d) None

06.23. Super bypass filter is used on…………….engines

a) MWM b) Cummins c) Kirloskar d) SUN

06.24. In oil cooler….. is cooled.

a) Oil b) Air c) Water d) Fuel

06.25. The lube oil level should be between….and… mark of Dipstick.

a) T&B b) H&L c) U&L d) H&B

06.26. For checking lube oil …….. is used.

`a) Dipstick b) Glass Gauge c) Meter d) None

06.27. Oil pressure gauge fitted on driving panel will be mostly of …… type.

a) Electrical b) Mechanical c) Both a & b d) None

06.28. Oil pressure gauge fitted on driving panel will be mostly of ….. type.

a) Electrical b) Mechanical c) Both a & b d) None

06.29. The oil pressure indicating LED glows……..when oil pressure becomes low.

a) On b) Off c) Both a & b d) None

06.30. Oil pressure indicating LED gives indication of …. lube oil pressure.

a) Increased b) Decreased c) First A then B d) None

06.31. Minimum oil pressure rating at idle speed is …… bar.

a) 1.0 b) 1.5 c) 2.5 d) 3.5

06.32. Minimum oil pressure rating at rated speed is……bar.

a) 1.9 b) 1.5 c) 2.5 d) 3.5

06.33. The escaping of burnt gases from combustion chamber to the crank case

chamber is called …..

a) Blow bye b) Blow down c) Leakage d) Seepage

06.34. Breather is component of …….. system.

a) Air supply b) Fuel Supply c) Lubricating d) Cooling

06.35. Weak relief valve will result in …… lube oil pressure

a) Low b) High c) Medium d) None

06.36. Excessive clearance in bearings will result in …… lube oil pressure.

a) Low b) High c) Both a and b d) None

06.37. Worn out oil control ring results in ...........

a) Low lube oil Pressure b) High lube oil consumption

c) Both a and b d) None

06.38. Excessive clearance in intake valve guide results in …………



06.39. Clogged oil breather results in ………………..



06.40. Oil should be drained when engine is ………….

a) Hot b) Cold c) Both a and b d) None

06.41. Oil level should be kept at …… mark during lube Oil replacement.

a) H b) L c) T d) B

06.42. Filter cane should be ……… with new oil before fitment.

a) Filled b) Not filled c) Both a and b d) None

06.43. Centrifuge is provided in …………….. system.

a) Lube oil supply b) Air supply c) Fuel supply d) Cooling

06.44. Centrifuge is fitted on………engine.

a) MWM b) Kirloskar c) Cummins d) SUN

06.45. Centrifuge is fitted on ………….. engines.

a) Kirloskar b) Deutz c) Cummins d) SUN

06.46. Location of strainer is inside …….

a) Sump b) Cylinder Block c) Timing Cover d) Head

06.47. Location of lube oil pump on KTA-1150-L engine is ……………

a) In sump b) On cylinder block c) On Crank case d) On Head

06.48. Location of relief valve on KTA-1150-L engine is

a) In Sump b) On Cylinder Block c) In Oil Pump d) In Main Oil Gallery

06.49. Super bypass filter is ……. then inline lube oil filters

a) Finer b) Coarser c) Both a & b d) None

06.50. Lube oil pump is…….driven

a) Belt b) Gear c) Both a & b d) None

06.51. During starting of Cummins engine by pass switch is pressed to bypass ……

a) Bypass filter b) Lube oil Pressure safety Circuit

c) Shutdown valve d) Turbocharger

Chapter: Lubricating System of Diesel Engine


06.01 b 06.14 a 06.27 a 06.40 a

06.02 a 06.15 a 06.28 b 06.41 a

06.03 a 06.16 b 06.29 a 06.42 a

06.04 a 06.17 b 06.30 b 06.43 a

06.05 a 06.18 c 06.31 b 06.44 a

06.06 a 06.19 a 06.32 c 06.45 b

06.07 a 06.20 a 06.33 a 06.46 a

06.08 c 06.21 a 06.34 c 06.47 c

06.09 a 06.22 a 06.35 a 06.48 c

06.10 b 06.23 b 06.36 a 06.49 a

06.11 b 06.24 a 06.37 b 06.50 b

06.12 b 06.25 b 06.38 b 06.51 b

06.13 a 06.26 a 06.39 b

Chapter: Cooling System of Diesel Engine

07.01. Temperature of burning air fuel mixture is of the order of ………...

a) 250C b) 250

0C c) 2500

0 C d) 1500

0C

07.02. Temperature of engine must be controlled in the range of ………………

a) 710C-88

0C b) 74

0C-85

0C c) 200

0C-250

0C d) None

07.03. Cooling system should become functional when engine …………….

a) Warms up b) Cools down c) is started d) runs at rated rpm

07.04. Engine warms up faster in………………………..….system.

a) Air cooling b) Water Cooling c) Both a & b d) None

07.05. Air cooled engines are…………..than water cooled engines

a) Lighter b) Heavier c) Both a & b d) None

07.06. Air cooling is………………..efficient than water cooling.

a) Less b) More c) Both a & b d) None

07.07. Total length of finned cylinder barrel is ................... times the cylinder bore.

a) 1 to1.5 b) 0.5 to 1.5 c) 1.5 to 2.0 d) None

07.08. The normal operating water temperature of the engine should be......

a) 710C-88

0C b)

74

0C-82

0C c) Both a & b d) None

07.09. The most suitable operating water temperature of engine is assumed ……

a) 710C-88

0C b)

74

0C-85

0C c) 82

0C d) None

07.10. Radiator upper tank is connected to the water ………… of the engine.

a) Outlet b) Inlet c) Both a & b d) None

07.11. Radiator lower tank is connected to the water …………… of the engine.

a) Outlet b) Inlet c) Both a & b d) None

07.12. Thermostat valve starts opening at ………….

a) 710C b) 74

0C c)

85

0C d) 88

0C

07.13. Thermostat valve opens completed at ………….

a) 710C b) 74

0C c)

85

0C d) 88

0C

07.14. When Thermostat, valve opens completely, water from engine goes to ……..

a) Radiator b) Water Pump c) Both a & b d) None

07.15. When Thermostat valve closed completely, water from engine goes to ……….

a) Radiator b) Water Pump c) Both a & b d) None

07.16. Radiator fan ………… air through radiator.

a) Draws b) Throws c) Both a & b d) None

07.17. Relief valve and vacuum valve is provided in radiator cap in ...... water cooling

system.

a) Closed b) Open c) Both a & b d) None

07.18. Relief valve is set to open at a pressure of …… kg/cm2

a) 0.55 to 1.10 kg/cm2 b) 28 kg/cm

2 c) 6.5-7.0 kg/cm

2 d) None

07.19. A 1.10kg/cm

2 valve would provide a boiling point of ……..

a) 1000C b) 125

0C c)

85

0C d) 75

0C

07.20. Coolant Additive Concentrate (CAC) is used in ……….. engines.

a) Cummins b) MWM c) Both a & b d) None

07.21. Nalcool 2000 is used in …………… engines.


07.22. The ratio of CAC: Water is………………

a) 1:15 b) 1:30 c) 1:20 d) None

07.23. The ratio of Nalcool 2000: Water is………

a) 1:15 b) 1:30 c) 1:20 d) None

07.24. Maxtherm additive is used in …………… engines.


07.25. The ratio of Maxtherm additive: Water is ……….

a) 1:15 b)1:30 c) 1:20 d) None

07.26. In hot and shut down engine water should ………

a) Be Filled b) Not be filled c) Both a & b d) None

07.27. In hot running engine water ……… filled slowly.

a) May be b) should not be c) Both a & b d) None

07.28. Internal leak of water may produce ……… vapour in exhaust gases.

a) White b) Black c) Brown d) Colourless

07.29. Defective cylinder head gasket results in ………. leakage

a) Internal b) External c) Both a & b d) None

07.30. Recommended pH value of coolant on Cummins engine is…………

a) 7 b) less than 7 c) 8.5 to 10.5 d) 8.0 to 10.0

07.31. Recommended pH value of coolant on MWM engine is …………

a) 7 b) less than 7 c) 8.5 to 10.5 d) 8.0 to 10.0

07.32. Overcooling …………. volumetric efficiency.

a) Increases b) Decreases c) Both a & b d) None

07.33. Over cooling ……… thermal efficiency.

a) Increases b) Decreases c) Both a & b d) None

07.34. Blower is used in ………. cooling system.

a) Air b) Water c) Both a & b d) None

07.35. Fins are used in …………. cooling system.


07.36. Radiator fan is used in ………. cooling system.


07.37. In India, Thermostat valve is used in …………Cooling system.


07.38. Deutz BF 12L 513C is equipped with …….. cooling system.


07.39. MWM (Greaves) TBD 232 V12 engine is equipped with …… cooling system.


07.40. Cummins KTA-1150-L engine is equipped with ……….. cooling system.


07.41. Kirloskar HA 694 is equipped with ……… cooling system.


07.42. SUN 6105I engine is equipped with ……….. cooling system.


07.43. Air charge cooler on Deutz BF 12L 513C is ……….. cooled.


07.44. Inter cooler on MWM TBD 232 V12 Engine is…………..cooled.


07.45. After cooler on Cummins engines is ……………..cooled


Chapter: Cooling System of Diesel Engine


07.01 c 07.13 c 07.25 c 07.37 b

07.02 c 07.14 a 07.26 b 07.38 a

07.03 a 07.15 b 07.27 a 07.39 b

07.04 a 07.16 a 07.28 a 07.40 b

07.05 a 07.17 a 07.29 a 07.41 a

07.06 a 07.18 a 07.30 c 07.42 a

07.07 a 07.19 b 07.31 d 07.43 a

07.08 a 07.20 a 07.32 a 07.44 b

07.09 c 07.21 b 07.33 b 07.45 b

07.10 a 07.22 a 07.34 a

07.11 b 07.23 b 07.35 a

07.12 b 07.24 b 07.36 b

Chapter: Maintenance Schedule of Engine KTA 1150 L

08.01. In KTA 1150 L, Engine oil is checked in ………………. schedule.

a) Daily b) 50hrs c) 080hrs d) 200hrs

08.02. In KTA 1150 L, Coolant level is checked in ……….. schedule.


08.03. In KTA 1150 L, Air cleaner vaccum indicator is checked in ………. schedule.


08.04. In KTA 1150 L, V-belt tension is checked in …… schedule.


08.05. In KTA 1150 L, Air tank is drained ……….. the day’s work.

a) After b) Before c) Both a & b d) None

08.06. In KTA 1150 L, Water separator is drained ……. starting the engine.

a) Before b) After c) Both a & b d) None

08.07. In KTA 1150 L, V-belt condition is checked in ……… schedule.


08.06. In KTA 1150 L, Brake shoes condition is checked in ……….. schedule.


08.09. In KTA 1150 L, Electrolyte level and specific gravity of batteries is checked in

….. schedule.


08.10. In KTA 1150 L, Outer air filter is cleaned in ………. schedule.


08.11. In KTA 1150 L, High water temperature safely device is checked in ……

schedule.


08.12. In KTA 1150 L, Low lube oil pressure safely deice is checked in ...... schedule.


08.13. In KTA 1150 L, Mounting Bolt of engine is examined in ……….. schedule.


08.14. In KTA 1150 L, engine oil is replaced at ………..…. hrs.

a) 080 b) 200 c) 250 d) 0800

08.15. In KTA 1150 L, lube oil filter is replaced at ………..…. hrs.

a) 080 b) 200 c) 250 d) 0800

08.16. In KTA 1150 L, fuel filter is replaced at ………..…. hrs.

a) 080 b) 200 c) 250 d) 0800

08.17. In KTA 1150 L, lube oil by pass filter is replaced at …………. hrs.

a) 080 b) 200 c) 250 d) 0800

08.18. In KTA 1150 L, Crank case Breather is cleaned in …………. schedule

a) 080 b) 200 c) 250 d) 0800

08.19. In KTA 1150 L, Outer and Inner engine air cleaner element is replaced at …..

hrs.

a) 200 b) 250 c) 500 d) 0800

08.20. In KTA 1150 L, Self Starter is overhauled in schedule ……………..

a) III b) IV c) V d) VI

08.21. In KTA 1150 L, Alternator is overhauled in schedule ……………….

a) III b) IV c) V d) VI)

08.22. In KTA 1150 L, Injector is overhauled in schedule …………..


08.23. In KTA 1150 L, Fuel pump is overhauled in schedule ……………


08.24. In KTA 1150 L, Rocker cover Gasket is replaced in schedule ……….


08.25. In KTA 1150 L, Diesel Tank is cleaned in schedule ……….


08.26. In KTA 1150 L, Cooling Coil is cleaned in schedule …………


08.27. In KTA 1150 L, Schedule V is done at ………….. hours of engine running.

a) 200 b) 0800, 3000 & 5000 c) 2000 & 4000 d) 6000

08.28. In KTA 1150 L, Water Separator and Air Oiler is overhauled in schedule ……


08.29. In KTA 1150 L, Air unloaded is overhauled in schedule …………….


08.30. In KTA 1150 L, Schedule VI is done at ….….. hours of engine running

a) 200 b) 0800, 3000 & 5000 c) 2000 & 4000 d) 6000

08.31. In KTA 1150 L, Engine mounting pad is replaced in schedule…………..

a) III b) IV c) V d) VII

08.32. In KTA 1150 L, Dynamic Balance of vibration Damper is checked is schedule

……

a) III b) IV c) V d) VII

08.33. In KTA 1150 L, RPM of engine radiator from should not be less than ……

a) 900 b) 1600 c) 2080 d) 2300

08.34. In KTA 1150 L, while checking Tension of V belt, deflection at Centre should

not be more than …….. mm.

a) 08mm b) 15mm c) 25.4mm d) 20mm

Chapter: Maintenance Schedule of Engine KTA 1150 L


08.01 a 08.11 c 08.21 c 08.31 d

08.02 a 08.12 c 08.22 c 08.32 d

08.03 a 08.13 c 08.23 c 08.33 b

08.04 a 08.14 c 08.24 c 08.34 b

08.05 a 08.15 c 08.25 c

08.06 a 08.16 c 08.26 c

08.07 b 08.17 c 08.27 b

08.08 b 08.18 b 08.28 d

08.09 b 08.19 c 08.29 d

08.10 b 08.20 c 08.30 c

Chapter: Maintenance Schedule of Engine Deutz BF 12 L 513 C

09.01. In Deutz BF 12 L 513 C, Contamination indicator (pilot lamp) for dry type air

cleaner is checked in ……. schedule.


09.02. In Deutz BF 12 L 513 C, Outer air cleaner element of Deutz Engine is cleaned

with ……… pressure of dry air.

a) 1.5 bar b) 2.5 bar c) 3.5bar d) 6.5bar

09.03. In Deutz BF 12 L 513 C, Oil in the wet type air cleaner is changed in …..

Schedule.


09.04. In Deutz BF 12 L 513 C, Battery plug connection are cleared and petroleum

jelly is applied in ………..

a) Daily b) 50hrs c) 100hrs d) 200hrs .

09.05. In Deutz BF 12 L 513 C, Minimum Specific gravity should be ……..

a)1.180 b) 1.090 c) 1.240 d) 1.260

09.06. In Deutz BF 12 L 513 C, Fuel pre-filler (Wire mesh) is cleaned at …… engine

hrs schedule at

a) 50 b) 100 c) 200 d) 1000

09.07. In Deutz BF 12 L 513 C, twin stage fuel filter element is changed in ………..

Engine hrs Schedule

a) 50 b) 100 c) 200 d) 1000

09.06. In Deutz BF 12 L 513 C, engine oil is changed at engine ………. hrs.

a) 100 b) 200 c) 250 d) 300

09.09. In Deutz BF 12 L 513 C, Clutch Drive shaft bearings are greased in engine hrs

…... schedule.

a) 50 b) 100 c) 200 d) 1000

09.10. In Deutz BF 12 L 513 C, Clutch fluid level in container is checked in engine

hrs. …... schedule.

a) 50 b) 100 c) 200 d) 1000

09.11. In Deutz BF 12 L 513 C, Cooling coil is decarbonized in schedule …………..

a) IV b) V c) VI d) VII

09.12. In Deutz BF 12 L 513 C, High pressure fuel pipes clamps are checked in

schedule ……..


09.13. In Deutz BF 12 L 513 C, Crankcase Breather element is replaced in schedule

……


09.14. In Deutz BF 12 L 513 C, engine temperature indicator is tested in schedule …..


09.15. In Deutz BF 12 L 513 C, fuel injection pump and injectors are calibrated in

schedule ……


09.16. In Deutz BF 12 L 513 C, Blower Assembly is overhauled in schedule ………


Chapter: Maintenance Schedule of Engine Deutz BF 12 L 513 C


09.01 a 09.06 b 09.11 b 09.16 d

09.02 a 09.07 b 09.12 b

09.03 b 09.06 b 09.13 b

09.04 b 09.09 c 09.14 b

09.05 c 09.10 c 09.15 c

Chapter: Maintenance Schedule of Engine MWM TBD 232 V 12

10.01. Recommended coolant water temperature for MWM TBD 232 V 10 is ……

a) 750C to 85

0C b) 71

0C to 88

0C d) None

10.02. Maximum coolant temperature of MWM TBD 232 V 10 is ……

a) 710C b) 85

0C c) 88

0C d) 95

0C

10.03. Safety circuit of MWM TBD 232 V 10 ……. if water temperature rises above

950C

a) Gives buzzer sound b) Shuts down the engine c) Both a & b d) None

10.04. As per RDSO Maintenance schedule, lube oil of MWM TBD 232 V 10 is to be

changed at ……

a) 100hrs b) 105hrs c) 200hrs d) 250hrs)

10.05. As per RDSO maintenance schedule, fuel filters of MWM TBD 232 V 10 are to

be changed at ……. hrs.

a) 100 b) 105 c) 200 d) 250

10.06. As per RDSO maintenance schedule, centrifuge of MWM TBD 232 V 10 is to

be cleaned at ……. hrs.

a) 100 b) 105 c) 200 d) 250

10.07. Valve tappet clearance of MWM TBD 232 V10 engine is …… mm in cold

a) 0.2 b) 0.3 c) 0.14 d) 0.27

10.06. As per RDSO maintenance schedule, crankcase breather of MWM TBD 232 V

10 is to be cleaned at ……. hrs.

a) 100 b) 105 c) 200 d) 250

10.09. As per RDSO maintenance schedule, compressor breather of MWM TBD 232

V 10 is to be cleaned at ……. hrs.

a) 100 b) 105 c) 200 d) 250

10.10. As per RDSO maintenance schedule, compressor filter of MWM TBD 232 V

10 is cleaned at ……. hrs.

a) 100 b) 105 c) 200 d) 250

Chapter: Maintenance Schedule of Engine MWM TBD 232 V 10

Question Answer Question Answer

10.01 a 10.06 b

10.02 d 10.07 a

10.03 b 10.06 c

10.04 b 10.09 c

10.05 b 10.10 c

Chapter: Maintenance Steps of Diesel Engine

Maintenance Steps to Improve Performance

11.01. Priming of engine is done to maintain …….. film on bearing surfaces.

a) Coolant b) Lube oil c) Fuel d) Grease.

11.02. Uniform metered fuel and …………. are requirements of fuel regulation.

a) Fine spray b) Scattered Spray c) Thick droplets d) None

11.03. Over speeding causes piston to strike and break …………

a) Rings b) Injectors c) Valves d) Cylinder Head

11.04. During Normal operations, over speeding of engine is protected by ……….

a) FIP b) Injector c) Governor d) Accelerator

11.05. For controlling corrosion in MWM engine …… is added to water in ratio 1:30.

a) CAC b) Nalcool 2000 c) Nalprep d) None

Providing Piston Rings on Piston

11.06. …….. most ring is assembled first.

a) Bottom b) Top c) Both a & b d) None

11.07. Piston rings are inserted through piston ……. side

a) Skirt b) Top c) both d) None

11.08. The end gap of piston ring is approximately ……. per inch of piston diameter.

a) 0.001” b) 0.01” c) 0.1” d) 0

11.09. The gap for all the piston rings ………… fall in one line.

a) Should b) Shouldn’t c) Both a & b d) None

11.10. While fitting the piston rings apply sufficient quantity of ……. oil

a) Lube b) Hydraulic c) Gear d) Mustard

11.11. Piston rings should fit …… in the grooves.

a) Tight b) Free c) Both a & b d) None

11.12. For easy insertion of piston rings …….. is used.

a) Ring Expander b) Ring Compressor c) Both a & b d) None

11.13. For easy sliding of piston with rings into liner ... is used.

a) Ring Expander b) Ring Compressor c) Both a & b d) None

11.14. To ensure piston facing in right direction, notch or other markings must face to

the ……… of the engine

a) Front b) Rear c) Both a & b d) None

11.15. In two stroke cylinders, ring gap …… face the port otherwise they may break.

a) Should b) Shouldn’t c) Both a & b d) None

Adjustment of Valve

11.16. In Cummins engines, valve clearance is gap between rocker arm and …….

a) Valve stem b) Cross head c) Push Rod d) None

11.17. In MWM/Kirloskar/Deutz Engines valve clearance is gap between rocker arm

and ….

a) Valve stem b) Cross head c) Push Rod d) None

11.18. Valve clearance is got maxm when piston is at TDC in ……Stroke.


11.19. At TDC of …… strokes, both the rocker arms will be loose.


11.20. At TDC of …… strokes, both the rocker arms will be in contact with valve

stems.


11.21. To bring the piston at TDC of Compression stroke from TDC of exhaust stroke

…………. revolution of flywheel is made.

a) ½ b) One c) Two d) None

11.22. From delivery pipe of FIP, fuel starts coming when corresponding piston is at

TDC of ……..stroke


11.23. Cummins injector is actuated at the end of ….............

a) Suction stroke b) Compression c) Power d) Exhaust.

11.24. Engine should be rotated in the …………….. of rotation

a) Direction b) Opposite Direction c) Both a & b d) None

11.25. To get next cylinder in the position of valve clearance adjustment according to

firing order, the engine needs to be rotated by……………

a) 1800/n b) 360

0/n c) 720

0/n d) None

11.26. A 6 cylinder engine needs to be rotated by …… to get next cylinder for valve

adjustment according to firing order.

a) 900 b) 120

0 c) 180

0 d) 360

0

11.27. A 12 cylinder engine needs to be rotated by …………….. to get next cylinder

for valve adjustment according to firing order

a) 900 b) 60

0 c) 120

0 d) 180

0

11.28. Inlet valve clearance of Cummins engines are ………..

a) 0.2mm b) 0.3mm c) 0.014” d) 0.027”

11.29. Exhaust valve clearance of Cummins engines are…….

a) 0.2 mm b) 0.3 mm c) 0.014” d) 0.027”

11.30. Inlet valve clearance on MWM engine is ……………...

a) 0.2 mm b) 0.3 mm c) 0.014” d) 0.027”

11.31. Exhaust valve clearance on MWM engine is ……….....

a) 0.2 mm b) 0.3 mm c) 0.014” d) 0.027”

11.32. Inlet valve clearance on BCM Deutz engine is ……......

a) 0.2 mm b) 0.3 mm c) 0.15 mm d) 0.027”

11.33. Exhaust valve clearance on BCM Deutz engine is……..

a) 0.2 mm b) 0.3 mm c) 0.15 mm d) 0.27”

11.34. Inlet valve clearance on PQRS HA 694 engine is……..

a) 0.2 mm b) 0.3 mm c) 0.15 mm d) 0.027”

11.35. Exhaust valve clearance on PQRS HA 694 engine is.…....

a) 0.2mm b) 0.3mm c) 0.15 mm d) 0.027”

11.36. Rocker lever of exhaust valve aligns with ........... manifold.

a) Exhaust b) Inlet c) Both a & b d) None

11.37. Rocker lever of inlet valve aligns with ........ manifold.

a) Exhaust b) Inlet c) Both a & b d) None

Adjustment of injection timing and testing of nozzles

11.38. ‘INJ’ mark on flywheel …………. the TDC mark on flywheel-

a) Leads b) Legs c) Any of a or b d) None

11.39. In injection timing adjustment 1 No. plunger pump is matched with ……

cylinder-piston.

a) 1 No. b) 2 No. c) 3 No. d) 5 No.

11.40. ‘Spill cut off’ is used in ……… adjustment.

a) Injection lining b) Valve clearance c) Both a & b d) None

11.41. Idle adjustment stop screw is provided on ………….

a) Feed Pump b) Injector c) FIP d) Filter.

11.42. For injection timing adjustment ……. No. cylinder is brought at TDC of

compression stroke.

a) 1 b) 2 c) 3 d) 5

11.43. FIP coupling is tightened with engine coupling when one no. plunger … lifting.

a) Starts b) End c) is at mid of d) None

11.44. During fine adjustment of injection timing control rack is kept in … position.

a) Zero b) Full c) Mid d) None

11.45. If injection pressure is less, then adjusting screw of injector is ……

a) Tightened b) Loosened c) Any of a or b d) None

11.46. If injection pressure is more, then adjusting screw of injector is …………

a) Tightened b) Loosened c) Any of a or b d) None

11.47. In leak off test of injector a pressure of …… bar is built up.

a) 180bar b) 150bar c) 28 bar d) 1 bar

11.48. In leak off test pressure is maintained for ……… seconds.

a) 1 b) 5 c) 10 d) Nothing specific

11.49. In spray test spray should be ……………

a) Fully atomized b) Splitted drops c) Current of fuel d) None

Inspection of Crankshaft

11.50. In alignment check of crankshaft, run out on intermediate journals should not

be more than ………….

a) 0.001” b) 0.027” c) 0.002” d) 0.014”

11.51. In roughness check of crank shaft ……… piece is rubbed on surface.

a) Copper b) Aluminium c) Bronze d) White m

11.52. ……….. colour indicates overheating.

a) Red b) Brown c) Bluish d) None

11.53. Gradually increasing/decreasing readings on intermediate journals indicates

………

a) Bow b) Twist c) Unbalance d) None

11.54. If a pair of crankpins on TDC falls to BDC after pushing it indicates static

………

(a) Balance (b) Un-balanced c) Any of a or b d) None

11.55. If journals and pins are tapered or out of round more than ……., they should be

reground.

a) 0.001” b) 0.003” c) 0.014” d) 0.002”

Trouble Shooting of Cummins Engines

11.56. Shutdown mechanism provided on engine stop ……….

a) Air supply b) Fuel supply c) Coolant flow d) Exhaust flow

11.57. Governor provided on engine regulates …………

a) Air supply b) Fuel supply c) Coolant flow d) Exhaust flow

11.58. Cranking speed for self starting the engine is ………..

a) 50-100 RPM b) 100-150 RPM c) 100-200 RPM d) 1000 RPM

11.59. Thermostat checking temperature is ………….

a) 71°C b) 74°C c) 85°C d) 88°C

11.60. Poor compression is got remedied by …………….

(a) Top overhaul (b) Air Filter Cleaning

(c) Valve setting (d) Compressor overhauling

Troubleshooting of Deutz and MWM Engine

11.61. Fuel pre-filter in Deutz BF 12L 513C engine is fitted …….. fuel feed pump.

a) After b) Before c) Both a & b d) None

11.62. Fins of cylinders are cleaned during monthly schedule by ……….

a) Air Jet b) Water Jet c) Detergent d) Chemical

Setting of Torque Wrenches, Tightening Torque of different engine assemblies,

Clearance of moving parts

11.63. What is the S.I. unit of torque marked on torque wrench?

a) N-m b) Kg-m c) ft-lb d) None

11.64. What is the M.K.S. unit of torque marked on torque wrench?


11.65. What is the F. P. S. unit of torque marked on torque wrench?


11.66. Cylinder head of KTA 1150 L engine is tightened by giving torque in … steps.

a) 2 b) 3 c) 4 d) 6

11.67. For KTA 1150 L engine, torque value for cylinder head cap lubricated cap

screw (Black) is ……. ft lbs.

a) 250-260 b) 350-370 c) 339-353 d) 475-502

11.68. In KTA 1150 L engine, flywheel mounting torque New max. is …..

a) 100 ft-lbs b) 200 ft-lbs c) 120ft-lbs d) 220 ft-lbs

11.69. In KTA 1150 L engine, flywheel housing mounting torque New max. is …

(a) 70 ft-lbs (b) 80 ft-lbs (c) 140 ft-lbs (d) 160 ft-lbs

11.70. In KTA 1150 L engine, vibration damper alignment mark is permitted up to ….

a) ± 1/16” b) ± 1/8” c) ± 1/4” d) ± 1/2”

11.71. In Deutz BF 12L 513C engine, torque of Rocker cover is ……

a) 8.5N-m b) 21N-m c) 30N-m d) 50N-m

11.72. In Deutz BF 12L 513C engine, Rocker arm setscrew torque is ….

a) 8.5N-m b) 21N-m c) 30N-m d) 50N-m

11.73. In Deutz BF 12L 513C engine, injector mounting torque is ……….

a) 8.5N-m b) 21N-m c) 30N-m d) 50N-m

11.74. In MWM TBD 232 V12 engine, cylinder head bolt torque is ……….

a) 21N-m b) 26N-m c) 8N-m d) 28N-m

11.75. In MWM TBD 232 V12 engine, flywheel bolt torque is ……….

a) 21N-m b) 26N-m c) 8N-m d) 28N-m

11.76. In MWM TBD 232 V12 engine, main bearing bolt torque is …….

a) 21N-m b) 26N-m c) 8N-m d) 28N-m

11.77. Crankshaft end clearance worn-limit of KTA 1150 L engine is …….

a) 0.007” b) 0.017” c) 0.022” d) None

11.78. In MWM TBD 232 V12 engine, crankshaft end float is …….

a) 0.1-0.26mm b) 0.05-0.030mm c) 0.1-0.2mm d) None

11.79. In MWM TBD 232 V12 engine, crankshaft run out maxm is …….

a) 0.05mm b) 0.30mm c) 0.10mm d) 0.03mm

Chapter: Maintenance Steps of Diesel Engine


11.01 b 11.21 b 11.41 c 11.61 b

11.02 a 11.22 b 11.42 a 11.62 b

11.03 c 11.23 b 11.43 a 11.63 a

11.04 c 11.24 a 11.44 b 11.64 b

11.05 b 11.25 c 11.45 a 11.65 c

11.06 a 11.26 b 11.46 b 11.66 c

11.07 b 11.27 b 11.47 b 11.67 b

11.08 a 11.28 c 11.48 c 11.68 d

11.09 b 11.29 d 11.49 a 11.69 d

11.10 a 11.30 a 11.50 c 11.70 a

11.11 b 11.31 a 11.51 a 11.71 a

11.12 a 11.32 a 11.52 c 11.72 b

11.13 b 11.33 b 11.53 a 11.73 c

11.14 a 11.34 c 11.54 b 11.74 a

11.15 b 11.35 c 11.55 b 11.75 b

11.16 b 11.36 a 11.56 b 11.76 d

11.17 a 11.37 b 11.57 b 11.77 c

11.18 b 11.38 a 11.58 c 11.78 a

11.19 b 11.39 a 11.59 c 11.79

11.20 d 11.40 a 11.60 a 11.80

question bank internal combustion engine

Documents