| 1. | Which of the following has lower sp. gravity ? | |
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Dilute H2S04
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Concentrated H2S04
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Water
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Any of the above
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Report Question| 2. | Charging of sulphated battery produces ...... heat ? | |
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no
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very little
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less
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more
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| 3. | Two batteries having unequal e.m.f. ? | |
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can be connected in series only
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cannot be connected in series
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cannot be connected in parallel
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may be connected in series or in parallel
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| 4. | In a lead-acid battery the energy is stored in the form of ? | |
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charged ions
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chemical energy
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electrostatic energy
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electromagnetic energy
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| 5. | A fuel cell converts ...... energy into electrical energy ? | |
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mechanical
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magnetic
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solar
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chemical
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| 6. | Higher current density is usually recommended for ? | |
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tin plating
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cadmium plating
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bronze plating
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chromium plating
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| 7. | The life of a lead-acid battery is expected to be ? | |
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two months
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one year
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two to five years
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ten to fifteen years
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| 8. | Dry cell is modification of ? | |
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Deniell cell
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Leclanche cell
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Lead-acid cell
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Edison cell
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| 9. | Highest purity copper is obtained by ? | |
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electroplating
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roasting
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smelting
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any of the above processes
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| 10. | Petroleum jelly is applied to the electrical connections to the lead-acid battery ? | |
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prevent local heating
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prevent short-circuiting
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reduce path resistance
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prevent corrosion
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