Practice Test: Question Set - 10
1. The best indication about the state of charge on a lead-acid battery is given by
- (A) Output voltage
- (B) Temperature of electrolyte
- (C) Specific gravity of electrolyte
- (D) None of the above
2. It is noticed that during discharging the following does not happen
- (A) Both anode and cathode become PbS04
- (B) Specific gravity of H2SO4
decreases
- (C) Voltage of the cell decreases
- (D) The cell absorbs energy
3. Electrolyte used in an Edison cell is
- (A) NaOH
- (B) KOH
- (C) HC
- (D) HNO3
4. Following will happen if the specific gravity of electrolyte becomes more than 1.23
- (A) Loss of capacity
- (B) Loss of life
- (C) Corrosion of the grids of the plate
- (D) All above
5. The current flow through electrolyte is due to the movement of
- (A) Ions
- (B) Holes
- (C) Electrons
- (D) None of the above
6. Charging of sulphated battery produces ________ heat.
- (A) No
- (B) Very little
- (C) Less
- (D) More
7. The storage battery generally used in electric power station is
- (A) Nickel-cadmium battery
- (B) Zinc-carbon battery
- (C) Lead-acid battery
- (D) None of the above
8. The internal resistance of an alkali cell is nearly _________ times that of the lead-acid cell.
- (A) Two
- (B) Three
- (C) Four
- (D) Five
9. In ________ system the charging current is intermittently controlled at either a maximum or minimum value
- (A) Two rate charge control
- (B) Trickle charge
- (C) Floating charge
- (D) An equalizing charge
10. Local action in a battery is indicated by
- (A) Excessive gassing under load conditions
- (B) Excessive drop in the specific gravity of
electrolyte even when the cell is on open circuit
- (C) Both (A) and (B)
- (D) None of the above
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