MCQ’s on Cells and Batteries|Cells and batteries Objective Questions

1. Active materials of a lead-acid cell are :

(a) lead peroxide (b) sponge lead

(c) dilute sulphuric acid (d) all the above

2. During the charging of a lead-acid cell :

(a) its cathode becomes dark chocolate brown

in colour

(b) its voltage increases

(c) it gives out energy

(d) specific gravity of H2SO4 is decreased

3. The ratio of Ah efficiency to Wh efficiency of a

lead-acid cell is :

(a) always less than one (b) just one

(c) always greater than one

(d) either (a) or (b)

4. The capacity of a cell is measured in :

(a) watt-hours (b) watts

(c) amperes (d) ampere-hours

5. The capacity of a lead-acid cell does NOT

depend on its :

(a) rate of charge

(b) rate of discharge

(c) temperature

(d) quantity of active material

6. As compared to constant-current system, the

constant-voltage system of charging a lead-acid

cell has the advantage of :

(a) avoiding excessive gassing

(b) reducing time of charging

(c) increasing cell capacity

(d) both (b) and (c).

7. Sulphation in a lead-acid battery occurs due to:

(a) trickle charging

(b) incomplete charging

(c) heavy discharging (d) fast charging

8. The active materials of a nickel-iron battery are.

(a) nickel hydroxide

(b) powdered iron and its oxides

(c) 21% solution of caustic potash

(d) all of the above.

9. During the charging and discharging of a nickel

iron cell :

(a) its e.m.f. remains constant

(b) water is neither formed nor absorbed

(c) corrosive fumes are produced

(d) nickel hydroxide remains unsplit

10. As compared to a lead-acid cell, the efficiency

of a nickel-iron cell is less due to its :

(a) lower e.m.f.

(b) smaller quantity of electrolyte used

(c) higher internal resistance

(d) compactness.

11. Trickle charging of a storage battery helps to :

(a) prevent sulphation

(b) keep it fresh and fully charged

(c) maintain proper electrolyte level

(d) increase its reserve capacity

12. A dead storage battery can be revived by :

(a) a dose of H2SO4

(b) adding so-called battery restorer

(c) adding distilled water

(d) none of the above

13. The sediment which accumulates at the bottom

of a lead-acid battery consists largely of :

(a) lead-peroxide (b) lead-sulphate

(c) antimony-lead alloy (d) graphite

14. The reduction of battery capacity at high rates

of discharge is primarily due to :

(a) increase in its internal resistance

(b) decrease in its terminal voltage

(c) rapid formation of PbSO4 on the plates

(d) non-diffusion of acid to the inside active

materials.

15. Floating battery systems are widely used for :

(a) power stations

(b) emergency lighting

(c) telephone exchange installation

(d) all of the above

16. Any charge given to the battery when taken off

the vehicle is called :

(a) bench charge (b) step charge

(c) float charge (d) trickle charge

ANSWERS

1. d 2. b 3. c 4. d 5. a 6. d 7. b 8. d 9. b 10. c 11. b 12. d 13. c 14. c 15. d 16. a

Read also

Cells and Batteries

Cells and Batteries Quiz

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