Electrolysis and Storage of Batteries

91. The following indicate that battery on charge has attained full charge

1. colour of electrode
2. gassing
3. specific gravity
4. all above

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92. The internal resistance of a lead-acid cell is that of Edison cell

1. less than
2. more than
3. equal to
4. none of the above

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93. The internal resistance of an alkali cell is nearly _________ times that of the lead- acid cell.

1. two
2. three
3. four
4. five

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94. The lead-acid cell should never be discharged beyond

1. 1.8 V
2. 1.9 V
3. 2 V
4. 2.1 V

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95. The open circuit voltage of any storage cell depends wholly upon

1. its chemical constituents
2. on the strength of its electrolyte
3. its temperature
4. all above

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96. The output voltage of a charger is

1. less than the battery voltage
2. higher than the battery voltage
3. the same as the battery voltage
4. none of the above

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97. The ratio of ampere-hour efficiency to watt-hour efficiency of a lead-acid cell is

1. just one
2. always greater than one
3. always less than one
4. none of the above.

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98. The specific gravity of electrolyte is measured by

1. manometer
2. a mechanical gauge
3. hydrometer
4. psychrometer

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99. The storage battery generally used in electric power station is

1. nickel-cadmium battery
2. zinc-carbon battery
3. lead-acid battery
4. none of the above

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100. The substances which combine together to store electrical energy during the charge are called _________ materials

1. active
2. passive
3. inert
4. dielectric

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