Practice Test: Question Set - 11
1. During the idle period of the battery, strong electrolyte tends to change the active material of the cell into
- (A) PbO2
- (B) PbSC4
- (C) PbO
- (D) Pb
2. Those substances of the cell which take active part in chemical combination and hence produce electricity during charging or discharging are known as _________materials.
- (A) Passive
- (B) Active
- (C) Redundant
- (D) Inert
3. Electrolyte used in a lead-acid cell is
- (A) NaOH
- (B) Only H2S04
- (C) Only water
- (D) Dilute H2SO4
4. The lead-acid cell should never be discharged beyond
- (A) 1.8 V
- (B) 1.9 V
- (C) 2 V
- (D) 2.1 V
5. Persons preparing electrolyte should wear
- (A) Goggles or other face shield
- (B) Rubber
- (C) Rubber boots and gloves
- (D) All above safety devices
6. Which of the following battery is used for aircraft?
- (A) Lead-acid battery
- (B) Nickel-iron battery
- (C) Dry cell battery
- (D) Silver oxide battery
7. As compared to a lead-acid cell, the efficiency of a nickel-iron cell is less due to its
- (A) Compactness
- (B) Lower e.m.f.
- (C) Small quantity of electrolyte used
- (D) Higher internal resistance
8. In order that a hydrometer may float vertically in electrolyte its C.G. should be
- (A) Lowered
- (B) Raised
- (C) Undisturbed
- (D) Displaced sideways
9. Which of the following primary cells has the highest voltage?
- (A) Manganese-alkaline
- (B) Carbon-zinc
- (C) Lithium
- (D) Mercury
10. Five 2 V cells are connected in parallel. The output voltage is
- (A) 1 V
- (B) 1.5 V
- (C) 1.75 V
- (D) 2 V
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