Practice Test: Question Set - 08
1. Ampere hour capacity of an industrial battery is based on ________ hours discharge rate.
- (A) 8
- (B) 12
- (C) 16
- (D) 24
2. For a cell to work, which of the following condition(s) become necessary?
- (A) Two electrodes of different meta's should be
inserted in the electrolyte, not touching each other
- (B) Electrolyte must chemically react with one
of the electrodes
- (C) Electrolyte liquid or paste should be conducting
- (D) All above three conditions are necessary
3. Which among the following constitutes the major load for an automobile battery?
- (A) Brake light
- (B) Self starter
- (C) Parking lights
- (D) Spark plugs
4. The active materials on the positive and negative plates of a fully charged lead-acid battery are
- (A) Lead and lead peroxide
- (B) Lead sulphate and lead
- (C) Lead peroxide and lead
- (D) None of the above
5. It is noticed that durum charging
- (A) There is a rise in voltage
- (B) Energy is absorbed by the cell
- (C) Specific gravity of H2SO4
is increased
- (D) All of the above
6. The specific gravity of electrolyte is measured by
- (A) Manometer
- (B) A mechanical gauge
- (C) Hydrometer
- (D) Psychrometer
7. Batteries are charged by
- (A) Rectifiers
- (B) Engine generator sets
- (C) Motor generator sets
- (D) Any one of the above methods
8. During discharge, the active material of both the positive and negative plates is changed to
- (A) Pb
- (B) PbO2
- (C) PbO
- (D) PbS04
9. Weston standard cell at 20°C has voltage of ________ volts.
- (A) 0.8
- (B) 0.9
- (C) 1.0187
- (D) 1.5
10. When the load resistance equals the generator resistance which of the following will be maximum?
- (A) Current
- (B) Efficiency of the circuit
- (C) Power in the load resistance
- (D) Voltage across the load resistance
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