Electrolysis and Storage of Batteries Questions Answers - Set 08 - ObjectiveBooks

Electrolysis and Storage of Batteries Questions Answers - Set 08

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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