EGCB 2014 Question BUET (23.05.2014)

Rony Parvejs EEE Question Bank EGCB-2014, BUET

Recruitment Test Question of Electricity Generation Company of Bangladesh (EGCB)

Compiled by: Rony Parvej (IUT, EEE07) Post: Assistant Engineer (Electrical)

Time: 90 minutes Full Marks: 100

Exam Date: 23.05.2014 Venue: BUET

[ - MCQ ( ), MCQ ( ), ( ) ]

MCQ ( Non-Departmental) 60 x 0.75 =40

1. Gravity setting chambers are used in industries to remove

(a) SOx (b) NOx (c) suspended particulate matter (d) CO

2. Dumping is

(a) selling of goods abroad at a price well below the production cost at the home market price

(b) the process by which the supply of a manufacture's product remains low in the domestic

market, which batches him better price

(c) prohibited by regulations of GATT

(d) All of the above

3. Friction can be reduced by changing from

(a) sliding to rolling (b) rolling to sliding

(c) potential energy to kinetic energy (d) dynamic to static

4. The ozone layer restricts

(a) Visible light (b) Infrared radiation

(c) X-rays and gamma rays (d) Ultraviolet radiation

5. Free market is

(a) a condition in the international market where nations do not impose customs duty or other taxes on

import of goods

(b) market where the price of a commodity is determined by free play of the forces of supply and

demand

(c) ports that are exempted from payment of customs duty on articles of commerce, primarily to

encourage tourism

(d) None of the above

6. Ecology deals with

(a) Birds (b) Cell formation

(c) Relation between organisms and their environment (d) Tissues

7. Sound travels at the fastest speed in

(a) steel (b) water (c) air (d) vacuum

8. Sound waves in air are

(a) transverse (b) longitudinal (c) electromagnetic (d) polarised


9. Magnetism at the centre of a bar magnet is

(a) minimum (b) maximum (c) zero (d) minimum or maximum

10. Let a thin capillary tube be replaced with another tube of insufficient length then, we find water

(a) will overflow (b) will not rise (c) depressed (d) change its meniscus

11. Moment of inertia is

(a) vector (b) scalar (c) phasor (d) tensor

12. Sound waves in air are

(a) transverse (b) longitudinal (c) electromagnetic (d) polarised

13. Sound of frequency below 20 Hz is called

(a) audio sounds (b) infrasonic (c) ultrasonic (d) supersonics

14. Rainbow is due to

(a) absorption of sunlight in minute water droplets

(b) diffusion of sunlight through water droplets

(c) ionisation of water deposits

(d) refraction and reflection of sunlight by water droplets

15. ? (a) (b) (c) (d) 16. ; ? (a) (b) (c) (d) 17. (a) + (b) + (c) + (d) + 18. ? (a) (b) (c) (d) 19. ? (a) (b) (c) (d) 20. ? (a) (b) (c) (d) 21. ? (a) (b) (c) (d) 22. ? (a) (b) (c) (d) 23. ? (a) (b) (c) (d) 24. ? (a) (b) (c) (d) 25. , ? (a) (b) (c) (d) 26. ? (a) (b) (c) (d) 27. suppose two mothers and two daughters went to a restaurant for lunch and each of them costed

500tk and total cost 1500 then how can it happen?

(a) (b) (c) (d) there was three, grandmother, mother and daughter.


28. if , 2


MCQ ( Departmental) 20 x 1 =20

1. What is the reason of Load-shedding in Bangladesh ?

(a) Shortage of natural gases (b) outage of generators (c) (d)

2. Over excited synchronous generator

(a) Produces MVAR (b) absorbs MVAR (c) (d)

3. Which type of wire is used in transmission line overhead towers in Bangladesh.

(a) ASCR (b) ASCR with optical fiber (c) (d)

4. Without using repeater signals can be send using multimode and single mode fibers

(a) Upto 2 Km and 20 Km respectively (b) Upto 20 Km and 2 Km respectively (c) (d)

5. Generation voltage of bangladesh is ---- and and it is connected to ---- Transmission line.

(a) (b) (c) (d)

6. IDMT Relay is used for -

(a) high current (b) low current (c) high current & low current

7. Dy1 means-

(a) Primary is delta and secondary is star connected and secondary leads primary by 30

(b) Primary is delta and secondary is star connected and primary leads secondary by 30

(c) (d)

8. a 3 phase load will draw-

(a) 1/3 of 1phase motor (b) 3 times of 1 phase motor (c) (d)

9. 20 ohm capacitive reactance is connected with a 50 hz source, What is the value of C?

(a) (b) (c) (d)

10. Synchroscope is used for

(a) (b) (c) (d)

11. What do you understand by DY1

(a) High voltage side is leading low voltage side by 30

(b) Low voltage side is leading high voltage side by 30

(c)

(d)

12. sampling rate related mcq

(a) (b) (c) (d)


Written ( Departmental) 13 x 3 + 6 =45

1. A single phase 1000/200 V takes a no load current of 3A at 0.2 power factor lagging. Calculate the

primary current and power factor when secondary current is 280 A at power factor 0.8 lagging.

2. A 10 MVA, 66KV, 50Hz, Y-connected 3-phase alternator has synchronous reactance of 0.635 . It is working at full load at 0.8 lagging p.f. condition. Find torque angle, neglect armature resistance.

3. With a phasor diagram show the effect of increasing the field current of a generator supplying a

constant real power and connected to a grid system.

4. Draw the wave shape of armature current in a generator subjected to a sudden three phase short-

circuit at its terminals. Define various reactance of generator from this wave shape.

5. Determine VCE abd IB :

6. A 400 V, 50 Hz, connected synchronous generator has a field reactance of 0.1 and armature resistance of 0.015 . At full load, the machine supplies 1200 A at 0.8 pf lagging. Under full-load conditions, the friction and windage losses are 40 KW and the core losses are 30 KW. What is the

machines overall efficiency? Ignore any field circuit losses.

7. Find the output of the following circuit when VIN = 10 cos 2 x 103 t.

8. Draw the frequency spectrum of x(t) and y(t):


15 70 9. Evaluate: ------------ + ln (8+j5)

3-j4

10. Determine the values of natural frequency, damping factor and unit step response of a system

represented by the second order transfer function,

10

H (s) = -------------

s2 + 6s +5

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EGCB 2014 Question BUET (23.05.2014)