| 1. | Which of the following factors adversely affects the capacity of the lead acid battery ? | |
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Temperature of surroundings
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Specific gravity of electrolyte
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Rate of discharge
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All of the above
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Report Question| 2. | Electric supply for electroplating should be ? | |
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low voltage a.c. voltage
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low frequency a.c. voltage
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d.c. voltage
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any of the above
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| 3. | In electroplating the current efficiency is usually ? | |
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40 to 50%
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60 to 70%
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80 to 90%
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90 to 98%
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| 4. | Which of the following substance when added to electrolyte promotes smooth deposition ? | |
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Glucose
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Albumen
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Gelatine
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Any of the above
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| 5. | ln case of a lead-acid battery a wet battery cover indicates ? | |
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over filling of the battery
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excessive gassing during charging
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leaky seals at covers
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any of the above
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| 6. | Which of the following cell has a reversible chemical reaction ? | |
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Lead-acid
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Mercury oxide
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Carbon-zinc
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Silver-oxide
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| 7. | Weston standard cell at 20ºC has voltage of ...... volts ? | |
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0.8
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0.9
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1.0187
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1.5
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| 8. | Persons preparing electrolyte should wear ? | |
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goggles or other face shield
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rubber
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rubber boots and gloves
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all above safety devices
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| 9. | Sulphated cells are indicated by ? | |
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the loss of capacity of the cell
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the decrease of the specific gravity
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the low voltage of the cell on discharge
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all above conditions
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| 10. | Undercharging ? | |
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reduces specific gravity of the electrolyte
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increases specific gravity of the electrolyte
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produces excessive gassing
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increases the temperature
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