Practice Test: Question Set - 09
1. In a lead-acid battery the energy is stored in the form of
- (A) Charged ions
- (B) Chemical energy
- (C) Electrostatic energy
- (D) Electromagnetic energy
2. During charging the specific gravity of the electrolyte of a lead-acid battery
- (A) Increases
- (B) Decreases
- (C) Remains the same
- (D) Becomes zero
3. During the charging and discharging of a nickel-iron cell
- (A) Corrosive fumes are produced
- (B) Water is neither formed nor absorbed
- (C) Nickel hydroxide remains unsplit
- (D) Its e.m.f. remains constant
4. The e.m.f. of an Edison cell, when fully charged, is nearly
- (A) 1.4 V
- (B) 1 V
- (C) 0.9 V
- (D) 0.8 V
5. Over charging
- (A) Produces excessive gassing
- (B) Loosens the active material
- (C) Increases the temperature resulting in buckling of
plates
- (D) All above
6. In constant-current charging method, the supply voltage from discharged to fully charged condition
- (A) Decreases
- (B) Increases
- (C) Remains constant
- (D) None of the above
7. Life of the batteries is in the following ascending order.
- (A) Lead-acid cell, Edison cell, Nickel cadmium cell
- (B) Lead-acid cell, Nickel-cadmium cell, Edison
cell
- (C) Edison cell, Nickel-cadmium cell, lead-acid cell
- (D) Nickel-cadmium cell, Edison cell, lead-acid cell
8. Capacity of a battery is expressed in
- (A) Ah
- (B) Vh
- (C) Wh
- (D) kWh
9. Charging a sulphated battery at high rate results in
- (A) Boiling of electrolyte due to gassing
- (B) Warping of plates
- (C) Damage to separators, cell caps covers and
battery case due to excessive temperature
- (D) All above
10. Which of the following cell has a. reversible chemical reaction?
- (A) Lead-acid
- (B) Mercury oxide
- (C) Carbon-zinc
- (D) Silver-oxide
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