1. A load curve is a plot of

- Load versus generation capacity
- Load versus current
- Load versus time
- Load versus cost of power.

2. During summer months the increased load is due to

- increased water supply
- vacations in institutions
- increased business activity
- increased use of fans and air conditioners

3. Which of the following category of consumers can provide the highest load factor?

- A domestic consumer
- A continuous process plant
- A steel melting unit using arc furnace
- A cold storage plant.

4. The normal connected load of a domestic consumer is usually

- up to 10 kW
- 10 to 20 kW
- 25 to 50 kW
- 50 to 100 kW

5. For economy in generation power

- diversity factor should be high
- plant utilization factor
- load factor should be high
- load factor and diversity factor should be low

6. Which of the following installation provides peaked load?

- Arc furnace
- Air conditioner
- Air compressor running continuously
- Cold storage plant

7. Load due to ceiling fans is nearly

- 10W
- 40 to 50 W
- 100 to 200 W
- 250 W to 2000 W

8. A load of a consumer is generally measured in terms of

- Volts
- Amperes
- Ampere hour
- kW

9. Demand factor is the

- Maximum Demand / Average Demand
- Maximum Demand / Connected Load
- Average Demand / Maximum Demand
- Connected Load / Maximum Demand

10. A stereo with two 10 watt loudspeakers will provide an electrical load of

- more than 12 W
- 12 W
- less than 6 W
- 6 W

11. In a system, if the base load is the same as the maximum demand, the load factor will be

- 1
- Zero
- Infinity
- 1 %

12. A system having a connected load of 100 kW, the peak load of 80 kW. base load of 20 kW and an average load of 40 kW, will have a load factor of

- 40%
- 50%
- 60%
- 80%

13. Load due to one-tonne air conditioner is nearly

- 100W
- 200 to 500 W
- 1 kW to 2 kW
- 5 kW to 10 kW

14. Which domestic utility item has highest power rating?

- Refrigerator
- Ceiling fan
- Tube light
- Electric iron

15. Load factor during a period is

- Average Load / Installed Capacity
- Average Load / Maximum Load
- Maximum Load / Average Load
- Maximum Load / Installed Capacity

16. A generating station has a maximum demand of 30 MW, a load factor of 60% and a plant capacity factor of 50%. The reserve capacity of the plant is

- 5 MW
- 4 MW
- 6 MW
- 10 MW

17. A power station has a maximum demand of 15000 kW. The annual load factor is 50% and plant capacity factor is 40%. The reserve capacity of the plant is

- 1875 kW
- 3750 kW
- 6000 kW
- 7500 kW

18. The power station’s plant load factor is defined as the ratio of

- the energy generated to that maximum energy that could have been generated
- average load to peak load
- minimum load to peak load
- minimum load to average load

19. In a load duration curve for an integrated power system, the uppermost crest represents the energy contributed by which one of the following?

- base power stations
- major thermal stations
- Peaking hydro or gas turbine stations
- non-conventional power stations

20. The daily energy produced in a thermal power station is 720 MWh at a load factor of 0.6. What is the maximum demand of the station?

- 50 MW
- 30 MW
- 72 MW
- 720 MW