Economics of power generation

1. Load curve helps in deciding

total installed capacity of the plant
sizes of the generating units
operating schedule of generating units
all of the above

Detailed SolutionLoad curve helps in deciding

2. Which of the following should be used for extinguishing electrical fires?

Water
Carbon tetrachloride fire extinguisher
Foam type fire extinguisher
CO2 fire extinguisher

Detailed SolutionWhich of the following should be used for extinguishing electrical fires?

3. The area under a load curve gives

average demand
energy consumed
maximum demand
none of the above

Detailed SolutionThe area under a load curve gives

4. Which of the following is the essential requirement of peak load plant?

It should run at high speed
It should produce high voltage
It should be small in size
It should be capable of starting quickly

Detailed SolutionWhich of the following is the essential requirement of peak load plant?

5. The expected useful life of an hydroelectric power station is around

15 years
30 years
60 years
100 years

Detailed SolutionThe expected useful life of an hydroelectric power station is around

6. Power plant is expected to have the longest life.

Steam
Diesel
Hydroelectric
Any of the above

Detailed SolutionPower plant is expected to have the longest life.

7. Which of the following is not necessarily an advantage of interconnecting various power stations?

Improved frequency of power supplied
Reduction in total installed capacity
Increased reliability
Economy in operation of plants

Detailed SolutionWhich of the following is not necessarily an advantage of interconnecting various power stations?

8. Generating capacity connected to the bus bars and ready to take load when switched on is known as

firm power
cold reserve
hot reserve
spinning reserve

Detailed SolutionGenerating capacity connected to the bus bars and ready to take load when switched on is known as

9. The primary reason for low power factor is supply system is due to installation of

induction motors
synchronous motors
single phase motors
d.c. motors

Detailed SolutionThe primary reason for low power factor is supply system is due to installation of

10. Which of the following power plants need the least period for installation ?

Thermal power plant
Diesel power plant
Nuclear power plant
Hydro-electric power plant

Detailed SolutionWhich of the following power plants need the least period for installation ?

Page 1Page 2Page 3Page 4Page 5
Test 1Test 2