ECET EEE 2009-7

1. A hydro electric power station is commonly found in

A. Dessert areas
B. Hilly areas
C. Swamps
D. Grass lands

Answer : Hilly areas
Explanation:-

2. The function of surge tank is to

A. supply water at constant pressure
B. Relieve water hammer pressure in the penstock pipe
C. produce surge in the pipeline
D. to maintain constant water

Answer : Relieve water hammer pressure in the penstock pipe
Explanation:-

3. The efficiency of a thermal power plant is of the order of

A. 15 %
B. 30 %
C. 50 %
D. 80 %

Answer : 30 %
Explanation:-

4. Most of the generators in thermal power plants run at

A. 15000 rpm
B. 30000 rpm
C. 1500 rpm
D. 3000 rpm

Answer : 3000 rpm
Explanation:-

5. Annual operating cost of a generating plant consists of

A. Fixed charges
B. semi-fixed charges
C. operating or running charges
D. All of the above

Answer : All of the above
Explanation:-

6. Load factor is the ratio of

A. Peak load to average load
B. Peak load to minimum load
C. Average load to peak load
D. All of the above

Answer : Average load to peak load
Explanation:-

7. Static capacitor is rated in terms of

A. KVAR
B. KW
C. KVA
D. KWH

Answer : KVAR
Explanation:-

8. The fault clearing time of a circuit breaker is usually of

A. Few seconds
B. One second
C. Few minutes
D. Few cycles of supply voltage

Answer : Few cycles of supply voltage
Explanation:-

9. Bulk oil circuit breakers can be used for voltages upto

A. 66 kv
B. 33 kv
C. 11 kv
D. 1.1 kv

Answer : 1.1 kv
Explanation:-

10. A.C. system has the following advantage

A. No skin effect
B. No charging current
C. Problem of instability is absent
D. Easy transformation of voltage

Answer : Easy transformation of voltage
Explanation:-