| 1. | Trickle charging of a storage battery helps to ? | |
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maintain proper electrolyte level
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increase its reserve capacity
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prevent sulphation
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keep it fresh and fully charged
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Report Question| 2. | The capacity of a cell is measured in ? | |
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amperes
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ampere-hours
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watts
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watt-hours
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| 3. | Excessive charging a battery tends to ? | |
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produce gassing
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increase the internal resistance of the battery
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to corrode, the positive plate into lead peroxide thereby weakening them physically
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bring about all above changes
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| 4. | ln a battery cover is placed over the element and sealed to the top of the battery container. This is done ? | |
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to reduce evaporation of water from electrolyte
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to exclude dirt and foreign, matter from the electrolyte
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to discharge both of the above function
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to discharge none of the above functions
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| 5. | ln a lead-acid battery fillers are provided ? | |
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to recover acid loss through vapours
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to prevent flow of gases
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to facilitate flow of gases
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all of the above
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| 6. | A bank of 12 cells is connected into 3 parallel branches containing 4 cells in series. What is the equivalent open circuit e.m.f. of bank ? | |
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2 V
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4 V
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6 V
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12 V
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| 7. | When the internal resistance of a cell is large compared to the external resistance in the circuit then high current can flow through the external resistance by grouping the cells ? | |
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in parallel
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in series
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in either series or parallel
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mixed
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| 8. | Which law(s) find application in electrolysis ? | |
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Ohm's law
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Faraday's laws
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Coulomb's laws
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Gauss's law
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| 9. | Silver coating is provided for ? | |
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bearing surfaces
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decorative purposes
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protective surfaces
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all of the above
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| 10. | Coating generally recommended for hard surfacing is ? | |
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lead plating
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copper plating
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chromium plating
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none of the above
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