caab (22.08.2008) recruitment test question

Rony arvej’s EEE Question ank CAAB-2008 Recruitme nt Test Question of Civil Aviation Authority Bangladesh (CAAB) Compiled by: Rony Parvej (IUT, EEE’07) Post: Assistant Engineer (Electrical) Time: 1 hour Full Marks: 75 Exam Date: 22.08.2008 Venue: unknown আলরকিটকার ৫০ 1. A transformer is rated to convert the high voltage of 12000V transmission line for use on a 120V distribution system. If there are 2000 turns on the high-voltage side, how many turns must the low voltage side have? 2. A 400v, 50Hz, 6 pole, 3-phase Y-connected synchronous motor has a synchronous reactance of 4 ohm/phase and a resistance of 0.5 ohm/phase. On full-load , the excitation is adjusted so that machine takes an armature current of 60 amp ere at 0.866 p. f. leading. Keeping the excitation unchanged find the maximum power output. Excitation, friction , windage and iron losses total 2KW. (Theraja 38.28) 3. Draw a single line diagram for a 133/11 KV substation showing bus-bars, CT, PT.... 4. (a) Define demand factor, capacity factor and load factor. (b) What do you understand by root-mean-square (r.m.s.) value of the alternating current? Find the r.m.s. value of half wave rectified alternating current. 5. (a) What is SNR? What is the significance of 3db SNR? (b) Define power factor. What are the dis-advantages of low power factor? 6. Why do insulators have negative temperature co-efficients of resistance? 7. How can three resistance of values 2Ω, 3Ω and 6Ω be connected to produce an effective resistance of (a) 4 Ω and (b) 1 Ω ? 8. Where do we use star-delta and delta-star transformation? আ লযজী ১৫ 9. Translate into English: প র সষায এক ভ র দান। অভযা ফাআ প র বারফা। ফব ন ান প র ফফহত য়। প র নানা যকভ যঙ এফং গয য়। ফাংরাদ ফত ভান এয ফাক চাল ে। 10. Correct the following sentences: i. I wish I can fly. ii. I tell him to go. iii. Would you mind to shut the door? iv. Let you … I go there. v. The team is comprisal of twelve pla yers. 11. Write meaning in bangla and make sentence with the following phrases: i. Keep up ii. Far & wide iii. At large iv. To give up v. at a loss

Upload: rajshahieee

Post on 03-Feb-2018

214 views

Category:

Documents

0 download

Report

Download

Embed Size (px):

TRANSCRIPT

7/21/2019 CAAB (22.08.2008) Recruitment Test Question

1/2

Rony

arvejs

EEE Question ank CAAB-2008

Recruitment Test Question of Civil Aviation Authority Bangladesh (CAAB)Compiled by:Rony Parvej(IUT, EEE07)

Post: Assistant Engineer (Electrical)

Time: 1 hour Full Marks: 75Exam Date: 22.08.2008 Venue: unknown

1. A transformer is rated to convert the high voltage of 12000V transmission line for use on a 120V

distribution system. If there are 2000 turns on the high-voltage side, how many turns must the lowvoltage side have?

2. A 400v, 50Hz, 6 pole, 3-phase Y-connected synchronous motor has a synchronous reactance of 4

ohm/phase and a resistance of 0.5 ohm/phase. On full-load, the excitation is adjusted so that

machine takes an armature current of 60 ampere at 0.866 p.f. leading. Keeping the excitation

unchanged find the maximum power output. Excitation, friction , windage and iron losses total2KW. (Theraja 38.28)

3. Draw a single line diagram fora 133/11 KV substationshowingbus-bars,CT,PT....

4.

(a) Define demand factor, capacity factor and load factor.

(b) What do you understand by root-mean-square (r.m.s.) value of the alternating current? Find the

r.m.s. value of half wave rectified alternating current.

5. (a) What is SNR? What is the significance of 3db SNR?

(b) Define power factor. What are the dis-advantages of low power factor?

6. Why do insulators have negative temperature co-efficients of resistance?

7. How can three resistance of values 2, 3 and 6 be connected to produce an effective resistance

of (a) 4 and (b) 1 ?

8. Where do we use star-delta and delta-star transformation?

9. Translate into English:

10. Correct the following sentences:

i. I wish I can fly.

ii. I tell him to go.

iii. Would you mind to shut the door?

iv. Let you I go there.

v. The team is comprisal of twelve players.

11. Write meaning in bangla and make sentence with the following phrases:

i. Keep up ii. Far & wide iii. At large iv. To give up v. at a loss
https://facebook.com/ronyiuthttps://facebook.com/ronyiuthttps://facebook.com/ronyiuthttps://facebook.com/ronyiut
7/21/2019 CAAB (22.08.2008) Recruitment Test Question

2/2

Rony

arvejs

EEE Question ank CAAB-2008

12. a. ?

b. ?

c. ?

d. ?

e. ?

f. ,,

g. ? ?

h. ?