Illumination mcq question and answer| Electrical enginering
1. A load curve is a plot of

Ans. load versus time

2. For economy in generation power

Ans. PUF(Plant Utilisation Factor)

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

Ans. A continious process plant

4.The load of a consumer is generally measured in terms of

Ans. kW(kilowatt)

6.Load factor during a period is

Ans. average load/maximum load

7. which of the following installation provides peaked load?

Ans. Arc furnace

8.Which domestic utility item has highest power rating?

Ans. Electric iron

9.Which plant can never 100% load factor?

Ans. Peak load plant

10.Which meter is installed at the premises of a consumer for recovery charges of electric energy?

Ans. kWh meter

11. Which equipment provides fluctuating load?

Ans. welding transformer

12. The ratio of maximum demand of the installation/sum of individual maximum demand is known as

Ans. Diversity factor

13. In a power plant a reserve generating capacity which is in operation but not in service. is known as

Ans. Hot reserve

14.In an interconnected system consisting of a nuclear power station, steam station and diesel generating station which plant can be used as base load plant?

Ans. Nuclear power station

15. capital cost per MWh highest in case of

Ans. nuclear power plant.

16. Steam power station will run with maximum efficiency when it is run

Ans. near full load

17. Which of the following is likely to result in lower efficiency of a power station?

Ans. Varying loads

18. Which of the following  will not contribute to low power factor?

Ans. Replacement of fluorescent lamp with incandescent lamps

19.Which of the following may not be effect of low plant operating power factor?

Ans. Improved illumination from lighting

20. Connected load is

Ans. The rating in kw of the installed electric load of the consumer

21.Direct conversion of heat into electrical power is possible through

Ans. thermonic converter,fuel cell, batteries.

22.Load sheeding is possible through

Ans. voltage reduction, frequency reduction, switching off the loads.

23. To avoid glare

Ans. object should be viewed from a distance

24. Heat from light source is particularly of importance while

Ans.Designing for air conditioning

25. which of the following can be used as a light dimming device?


Ans. Auto transformer, Variable reaction, SCR

26. The lens of the eye to ficusses an image on the

Ans. Retina

27. The sensor in the eye are known as

Ans. rods and cones

28  Dimming system for lights are used in

Ans. Theatres, auditoriums, ball room

29. The ignition voltage for sodium lamps is

Ans. 400 to 600 volts

30. Glare may result from

Ans.Excessive lighting contrast in the field of vision, excessive illuminance