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71.In a lead acid battery during charging

A. Specific gravity of acid increases
B. Voltage drops
C. Anode becomes white in colour
D. The cell gives out energy

Ans. A

72.A lead acid battery, even when not in use, should be recharged once in

A. Ten days
B. Three weeks
C. Six weeks
D. Six months

Ans. C

73.Sedimentation in lead acid batteries occurs due to

A. Slow charging at a low rate
B. Overcharging at high rate
C. Non-utilization for longer periods
D. Over discharging at slow rate

Ans. B

74.In a lead acid cell, hydrogen is liberated at

A. Positive plate
B. Negative plate
C. Both positive and negative plates
D. None of the above

Ans. B

75.The current flow through electrolyte is due to the movement of

A. Ions
B. Holes
C. Electrons
D. None of the above

Ans. A

75. Level of electrolyte in a cell should be ……..the level of plates

A. Below
B. Equal to
C. Above
D. None of the above

Ans. C

76 …….. Of electrolyte indicates the state of charge of the battery

A. Colour
B. Mars
C. Viscosity
D. Specific gravity

Ans. D

77.While preparing electrolyte for a lead acid battery

A. Water is poured into acid
B. Acid is poured into water
C. Anyone of the two can be added to other chemical
D. None of the above

Ans. B

78.Electrolyte for silver plating is

A. Potassium nitrate solution
B. Dilute sulphuric acid
C. Double cyanide of silver and potassium solution
D. Any of the above

Ans. C

79.The capacity of a battery is expressed in terms of

A. Current rating
B. Voltage rating
C. Ampere hour rating
D. None of the above

Ans. C

80.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

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