TOP Electrolysis and Storage of Batteries Multiple choice Questions and Answers pdf

11. The storage battery generally used in electric power station is
(a) nickel-cadmium battery
(b) zinc-carbon battery
(c) lead-acid battery
(d) none of the above
Ans: c

12. The output voltage of a charger is
(a) less than the battery voltage
(b) higher than the battery voltage
(c) the same as the battery voltage
(d) none of the above
Ans: b

13. Cells are connected in series in order to
(a)     increase the voltage rating
(6)     increase the current rating
(c) increase the life of the cells
(d) none of the above
Ans: a

14. Five 2 V cells are connected in parallel. The output voltage is
(a) 1 V
(6) 1.5 V
(c) 1.75 V
(d) 2 V
Ans: d

15. The capacity of a battery is expressed in terms of
(a)     current rating
(b)     voltage rating
(e) ampere-hour rating
(d) none of the above
Ans: c

16. Duringthe charging and discharging of a nickel-iron cell
(a) corrosive fumes are produced
(b) water is neither formed nor absorbed
(c) nickel hydroxide remains unsplit
(d)     its e.m.f. remains constant
Ans: b

17. As compared to constant-current system, the constant-voltage system of charging a lead acid cell has the advantage of
(a) reducing time of charging
(b) increasing cell capacity
(c) both (a) and (b)
(d) avoiding excessive gassing
Ans: c

18. A dead storage battery can be revived by
(a) adding distilled water
(6) adding so-called battery restorer
(c) a dose of H2SO4
(d) none of the above
Ans: d

19. As compared to a lead-acid cell, the efficiency of a nickel-iron cell is less due to its
(a) compactness
(b) lower e.m.f.
(c) small quantity of electrolyte used
(d) higher internal resistance
Ans: d

20. Trickle charging of a storage battery helps to
(a)     maintain proper electrolyte level
(b)     increase its reserve capacity
(c) prevent sulphation
(d) keep it fresh and fully charged
Ans: d

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