MCQ Questions

Question No. 1

Write a brief report comparing and contrasting the following types of electricity production: a) electricity grid (power supplied by a power station) b) diesel or petrol generators c) solar panel systems. Your report should include the following headings: • start-up cost (if any) • cost per day of using the type of power • maintenance costs • reliability • effects on the environment.

Answer :

a) electricity grid (power supplied by a power station)

b) diesel or petrol generators

c) solar panel systems

Question No. 2

Give the main functions of the following parts of a solar panel system for use in homes:

Answer :

a) solar cell

b) charge controller

c) back-up batteries

d) inverter

Question No. 3

A solar panel is used for converting:

Answer :

solar energy into thermal energy

solar energy into both thermal and electrical energy

electrical energy into thermal energy

solar energy into electrical energy

Question No. 4

An inverter in a solar panel system providing electricity for homes is used to:

Answer :

convert solar energy to electrical energy

regulate the amount of current passing to the back-up batteries

change the direct current to alternating current

change the alternating current to direct current

Question No. 5

Which one of the following statements concerning the solar collector is incorrect?

Answer :

The solar collector converts solar energy into electrical energy.

The glass panel of the collector allows light rays to enter the collector, but prevents them from leaving.

The pipes and metal base are all painted black so as to be good heat absorbers.

The heated water in the collector flows out through the top of the collector.

Question No. 6

The following statements refer to the use of solar cells for generating electricity. i) High start-up costs. ii) High efficiency in conversion of solar energy into electrical energy. (iii) Low contribution to emission of greenhouse gases. Which of the above statement(s) is (are) true?

Answer :

(i) only

(i) and (ii) only

(i), (ii) and (iii)

(i) and (iii) only

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