ECET EEE Model Paper-1 Part7

1. Motor-generator set for D.C. arc welding has generator of

A. Series type
B. Shunt type
C. Differentially compound type
D. Level compound type

Answer : Differentially compound type
Explanation:-

2. The initial response when the output is not equal to input is called

A. Transient response
B. Error response
C. Dynamic response
D. Either of the above

Answer : Transient response
Explanation:-

3. A universal motor can be run on

A. A.C. only
B. D.C. only
C. Either A.C. or D.C.
D. None of the above

Answer : Either A.C. or D.C.
Explanation:-

4. Split phase motor rotation can be reversed by reversing the connection of

A. Running winding only
B. Starting winding only
C. Either
D. Both A and B

Answer : Either
Explanation:-

5. Efficiency of a power transformer is the order of

A. 100%
B. 98%
C. 50%
D. 25%

Answer : 98%
Explanation:-

6. The dark and bright lamp method is used for

A. Transfer of load
B. Synchronizing
C. Balancing of load
D. Phase sequence

Answer : Synchronizing
Explanation:-

7. Common method of cooling a power transformer is

A. Natural air cooling
B. Air blast cooling
C. Oil cooling
D. Any of the above

Answer : Oil cooling
Explanation:-

8. An over excited synchronous motor takes

A. Leading current
B. Tagging current
C. Both A and B
D. None of the above

Answer : Leading current
Explanation:-

9. Slip rings are usually made of

A. Copper
B. Carbon
C. Phosphor bronze
D. Alumina

Answer : Phosphor bronze
Explanation:-

10. The starting torque of squirrel cage induction motor is usually

A. Low
B. Negligible
C. Same as full load torque
D. Slightly more than full load torque

Answer : Low
Explanation:-