| 1. | Which of the following is invariably seen in an electroplating plant ? | |
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Distilled water
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Rectifier
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Barrel
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Carbon brushes
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Report Question| 2. | The value of specific gravity of acid when a lead-acid battery is fully charged is ? | |
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1.1
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1.26
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1.15
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1.285
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| 3. | Following will happen if battery charging rate is too high ? | |
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excessive gassing will occur
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temperature rise will occur
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bulging and buckling of plates will occur
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all above will occur
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| 4. | Lead-acid cell has a life of nearly ...... charges and discharges ? | |
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500
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700
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1000
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1250
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| 5. | The internal resistance of an alkali cell is nearly times that of the lead-acid cell ? | |
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two
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three
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four
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five
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| 6. | Battery charging equipment is generally installed ? | |
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in well ventilated location
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in clean and dry place
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as near as practical to the battery being charged
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in location having all above features
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| 7. | The storage battery generally used in electric power station is ? | |
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nickel-cadmium battery
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zinc-carbon battery
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lead-acid battery
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none of the above
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| 8. | The ratio of ampere-hour efficiency to watt-hour efficiency of a lead-acid cell is ? | |
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just one
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always greater than one
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always less than one
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none of the above
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| 9. | Following will occur if level of electrolyte falls below plates ? | |
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capacity of the cell is reduced
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life of the cell is reduced
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open plates are converted to lead sulphate
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all above
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| 10. | In constant-current charging method, the supply voltage from discharged to fully charged condition ? | |
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decreases
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increases
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remains constant
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none of the above
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