Electrical MCQ Test

Mr Electro provides a lot of multiple choice question ( MCQ ) set for you in case if you are searching for it for different types of job like foreman, electrician, sub-engineer and engineer. It is mainly for electrical stream like Pre-diploma, diploma in electrical engineering and also for electrical engineers. Also, if you are looking MCQ (multiple choice question) for license exam, you can get a lot of benefit. n

Electrical MCQ for electrical diploma, engineering

1. A cylindrical wire is compressed in length by 10%. The percentage decreased in the resistance will be
A. 16%
B. 19%
C. 20%
D. 25%
2. Which of the following material is not used as fuse material?
A. silver
B. copper
C. carbon
D. aluminium
3. A capacitor is used to
A. block DC
B. pass DC
C. open voltage source
D. short voltage source
4. Which of the following distribution system is not normally used?
A. 3 phase, 4 wire
B. 3 pahse, 3 wire
C. single phase, 3 wire
D. single phase, 2 wire
5. The transformer is always rated in
A. KVA
B. KW
C. KV
D. KA
6. Among the following which is the static machine?
A. transformer
B. induction machine
C. dc machine
D. synchronous machine
7. Acceptable frequency variation in a power system is
A. ± 4%
B. ± 2%
C. ± 5%
D. ± 10%
8. SF6 gas is transport in
A. gas cylinders
B. liquid form in cylinder
C. solid form in boxes
D. air cylinder
9. The efficiency of transformer at full load 0.85 pf lag is 95%. Its efficiency at full load 0.85 pf lead will be
A. less tha 95%
B. more than 95%
C. 95%
D. 100%
10. Which of the following plant normally operated at high speed?
A. hyderpower
B. steam turbine
C. petrol engine
D. diesel engine
11. In DC machine, the greatest eddy current loss occurs in
A. yoke
B. armature
C. commutating poles
D. field poles
12. The stator core of the induction motor is made of
A. laminated cast iron
B. mild steel
C. silicon steel stamping
D. soft wood
13. The bundling of conductor is done primarily to
A. reduce reactance
B. increase reactance
C. increase ratio interference
D. reduce radio interference
14. Which of the following voltage regulation is considered to be the best
A. 2%
B. 30%
C. 70%
D. 98%
15. Which factor is least important for the base load plant?
A. high efficiency
B. high availability
C. quick starting
D. low capital cost
16. Noise level is measured in
A. decimals
B. decibels
C. millimtere per second
D. dB per second
17. No eddy current and hysteresis losses occur in
A. electrostatic instrument
B. PMMC instrument
C. moving iron instrument
D. electrodynamo meter instrument
18. A ohmmeter is basically
A. ammeter
B. voltmeter
C. multimeter
D. none
19. When a sodium vapor lamp is switched on, initially the color is
A. pink
B. yellow
C. green
D. blue
20. Which terminal doesn't belongs to SCR
A. anode
B. base
C. gate
D. cathod