Electrolysis Electrical Engineering Questions Answers - Set 11 - ObjectiveBooks

Electrolysis Electrical Engineering Questions Answers - Set 11

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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