# MCQ Questions for SSC JE Electrical

(a) 10A
(b) 6A
(c) 5A
(d) zero

(a) 2A
(b) 1.66A
(c) 1A
(d) 0.625A

(a) Linear
(b) Hyperbolic
(c) Parabolic
(d) Triangular

### 4. Specific resistance of a conductor depends upon

(a) Dimension of the conductor
(b) Composition of conductor material
(c) Resistance of the conductor
(d) Both (a) and (b)

### 5. Superposition theorem is essentially based on the concept of

(a) Reciprocity
(b) Linearity
(c) Duality
(d) Non-linearity

(a) 2000 KVA
(b) 125 KVA
(c) 250 KVA
(d) 1000 KVA

(a) 180°
(b) 90°
(c) 0°
(d) 270°

(a) δ = 0
(b) δ = 90°
(c) δ = 45°
(d) δ = 30°

(a) very low
(b) zero
(c) very high

### 10. The power factor at which transformer operates

(a) is unity
(b) is 0.8 lag
(d) Depends upon the power factor of the load

### 11. The effficiency of a 100 KVA transformer is 0.98 at full as well as half load. For this transformer at full load the copper loss

(a) is less than core loss
(b) is equal to core loss
(c) is more than core loss
(d) All the above

### 12. Which of the following will improve the mutual coupling between primary and secondary circuit?

(a) Transformer oil of high break down voltage
(b) High reluctance magnetic core
(c) Winding material of high resistivity
(d) Low reluctance magnetic core

### 13. High leakage transformers are of

(a) Small voltage ampere rating
(b) High voltage ampere rating
(c) High voltage rating
(d) Low voltage rating

(a) V2
(b) V
(c) √V
(d) 1/V

(a) (1 – s)Pg
(b) Pgs
(c) Pg/(1- s)
(d) Pg/s

### 16. The negative phase sequence in a 3-phase synchronous motor exists when the motor is

(c) supplied with unbalanced voltage
(d) hot

(a) 670 rpm
(b) 1000 rpm
(c) 1010 rpm
(d) 1030 rpm

(a) ± 1%
(b) ± 3%
(c) ± 5%
(d) ± 10%

### 19. For cooling of large size generators hydrogen is used because

(a) it offers reduced fire risk
(b) it is light in weight
(c) it is of high thermal conductivity
(d) all the above

(a) 0.75
(b) 0.375
(c) 1.33
(d) 1

### 21. To meet the reactive power requirements of load centres usually

(a) Shunt capacitors are used
(b) Series capacitors are used
(c) Shunt reactors are used
(d) Tap changing transformers are used

### 22. The power factor will be leading in case of

(a) dielectric heating
(b) resistance heating
(c) induction heating
(d) all the above

### 23. Which instrument has the lowest resistance?

(a) Ammeter
(b) Voltmeter
(c) Megger
(d) Frequency meter

### 24. The moving coil in a dynamometer wattmeter is connected

(a) in series with the fixed coil
(b) across the supply
(c) in series with the load
(d) any one of the above

(a) 1/X
(b) 1/R
(c) R/Z2
(d) X/Z2

(a) 9 A
(b) 5 A
(c) 3 A
(d) 1 A

(a) 32
(b) 16
(c) 8
(d) 4

(a) 4
(b) 2
(c) 1
(d) 0.5

(a) 27 V
(b) 24 V
(c) 10 V
(d) 5V

(a) Choke
(b) Transformer
(c) Thermocouple
(d) Generator