building materials soln

8/11/2019 Building Materials Soln

1/5

Building Materials

1.

Hardness of building stones is designated by

a. Mohs scale

b.

Brinells scale

c.

Vickers scaled.

All the above

2.

Limestone is classified as

a.

Sedimentary rock

b.

Metamorphic rock

c.

Igneous rock

d.

None of the above

3.

Vitrification of clay at the brick manufacturing process occurs at

a.

100oC

b.

700oC

c.

1000o

Cd.

1300oC

4.

Size of brick including the thickness of mortar is

a.

Actual size

b.

Nominal size

c.

Modular sixe

d.

None of the above

5.

Bricks of thickness less than the normal are called

a.

Ordinary bricks

b.

Standard bricks

c.

Engineered bricksd.

Tile bricks

6.

Bricks used for lining electric resistance furnace

a.

Ferrosterite Brick

b.

Acid resisting brick

c.

Silicon carbide brick

d.

Fire clay brick

7.

Compression test of bricks should be carried out at

a.

After immersing in water for 24 hours

b.

After immersing in water for 12 hours

c.

After immersing in water for 1 hour

d.

Bone dry condition

8.

Setting of lime mortar is by the process of

a.

Oxidation

b.

Hydration

c.

Carbonation

d.

Slaking


2/5

9.

Grades of PPC are

a.

33

b.

M20

c.

Fe415

d.

None of the above

10.

Compound responsible for higher long-term strength of cement is

a.

C2S

b.

C3S

c.

C3A

d.

C4AF

11.

Constituents of cement that need to be lowered to resist chemical attack is

a.

C3A and C4AF

b.

C2S and C3S

c.

C3S and C4AF

d.

C3S and C3A

12.

Maximum adulteration permitted in PPC is

a.

10

b.

20

c.

30

d.

None of the above (35)

13.

Inadequate burning during the manufacturing process of cement is obtained from

a.

Soundness test

b.

Permeability test

c.

Heat of hydration test

d.

Al the above

14.

Sand for RCC works should conform to

a.

Zone I, II, III

b.

Zone II,III, IV

c.

Zone III, IV,V

d.

Zone IV,V

15.

Hardboard is

a.

Wood particles embedded in synthetic resin

b.

Pulped wood compressed

c.

Wood fibers blended with resin and wax

d.

None of the above

16.

Glass is made 3 to 5 times stronger than float glass by

a.

Annealing

b.

Tempering

c.

Rolling

d.

Drawing

17.

The high strength reinforcement bars in the market are commonly manufactured by

a.

Cold twisting


3/5

b.

Annealing and tempering

c.

Thermo mechanical treatment

d.

Case hardening

18.

Yield strength of commercial reinforcement bar in India is

a.

250N/mm2

b.

415N/mm2

c.

500N/mm2

d.

550N/mm2

19.

Bond strength of reinforcement bar with concrete is determined by

a.

Bend and rebend test

b.

Tensile strength

c.

Pull out test

d.

All the above

20.

Water based coatings for walls with finishes ranging from mat to sheen is by

a.

Distempers

b.

Enamels

c.

Emulsions

d.

Primers

21.

Coating provided on the wall to remove the alkaline effect is

a.

Distempers

b.

Enamels

c.

Emulsions

d.

Primers

22.

Most suitable technique used for the manufacture of PVC overhead water tanks

a.

Blowing

b.

Dye casting

c.

Calendaring

d.

Centrifugal molding

23.

Vandal proof glass is made of

a.

Polycarbonate

b.

Polyethylene

c.

Nylon

d.

Amino plastics

24.

Variant of PVC that is less brittle and used to manufacture window and door frames is

a.

Plasticized PVC

b.

Unplasticised PVC

c.

Compounded PVC

d.

Nascent PVC

25.

Woven or non woven geosynthetic used as separation layer in solid waste landfill sites is

a.

Geotextile

b.

Geogrid

c.

Geomembrane


4/5

d.

All the above

26.

GI sheets are manufactured by coating steel sheet with

a.

Zinc

b.

Copper

c.

Tin

d.

Aluminum

27.

Light gauge sections is

a.

Cold formed steel

b.

Hot rolled steel

c.

TMT steel

d.

CTD steel

28.

Cold working of steel to manufacture Fe415 bar uses the principle of

a.

Strain hardening

b.

Annealing

c.

Case hardening

d.

Normalizing

29.

Best quality glass is manufactured by

a.

Extrusion

b.

Floating

c.

Drawing

d.

Rolling

30.

Tensile strength of concrete is determined by

a.

Cube test

b.

Split cylinder test

c.

Anchorage test

d.

Pull out test

31.

Workability of very harsh concrete mix can be done by

a.

Vee bee test

b.

Slump cone test

c.

Compaction factor test

d.

Flow test

32.

Efflorescence of RCC structure is caused by

a.

Alkali aggregate reaction

b.

Free lime in cement

c.

Both the above

d.

none of the above

33.

The number 20 in M20 while designating the grade of concrete stands for

a.

Mean strength

b.

Characteristic strength

c.

Target strength

d.

Standard strength

34.

The designation C-43 on cement bag indicates it is


5/5

a.

Ordinary portland cement

b.

Portland pozzolana cement

c.

Portland Slag Cement

d.

Sulphate resisting cement

35.

Based on IS 712-1973, Class A indicates

a.

Eminently hydraulic lime

b.

Fat lime

c.

White cement

d.

Expansive cement

36.

Water absorption after 24 hours of class 1 brick should be

a.

Less than 10% by weight

b.

Less than 10% by volume

c.

Less than 20% by weight

d.

Less than 20% by volume

37.

Smiths test is used to determine

a.

Deterioration of stone

b.

Deterioration of glass

c.

Deterioration of brick

d.

Deterioration of concrete

38.

Granite is

a.

Igneous rock

b.

Sedimentary rock

c.

Volcanic rock

d.

Metamorphic rock

39.

Test not applicable for wooden flush door is

a.

End immersion test

b.

Knife test

c.

Glue adhesion test

d.

None of the above

40.

Based on the thump rule, the theoretical quantity of coarse aggregate required to make 40m3

of M20 (1:2:4 by volume} concrete is

a.

5.7m3

b.

10m3

c.

20m3

d.

40m3

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