Electrolysis Objective Questions and Answers - Set 04 - ObjectiveBooks

Electrolysis Objective Questions and Answers - Set 04

Practice Test: Question Set - 04


1. In constant voltage charging method, the charging current from discharged to fully charged condition.
    (A) Decreases
    (B) Increases
    (C) Remains constant
    (D) None of the above

2. In a lead-acid cell, if the specific gravity of sulphuric acid is 1.8, it will require following ratio of acid to water to get mixture of specific gravity of 1.3
    (A) 6 parts of acid to 4 parts of water
    (B) 4 parts of acid to 4 parts of water
    (C) 4 parts of acid to 6 parts of water
    (D) 4 parts of acid to 8 parts of water

3. Dry cell is modification of
    (A) Deniell cell
    (B) Leclanche cell
    (C) Lead-acid cell
    (D) Edison cell

4. Short circuiting of a cell may be caused
    (A) Buckling of plates
    (B) Faulty separators
    (C) Lead particles forming circuit between positive and negative plates
    (D) Any one of above

5. Petroleum jelly is applied to the electrical connections to the lead-acid battery
    (A) Prevent local heating
    (B) Prevent short-circuiting
    (C) Reduce path resistance
    (D) Prevent corrosion

6. The charge required to liberate one gram equivalent of any substance is known as ________ constant.
    (A) Time
    (B) Faraday's
    (C) Boltzmann
    (D) None of these

7. The capacity of a battery is expressed in terms of
    (A) Current rating
    (B) Voltage rating
    (C) Ampere-hour rating
    (D) None of the above

8. The ampere-hour efficiency of a lead-acid cell is normally between
    (A) 20 to 30%
    (B) 40 to 50%
    (C) 60 to 70%
    (D) 90 to 95%

9. The open circuit voltage of any storage cell depends wholly upon
    (A) Its chemical constituents
    (B) On the strength of its electrolyte
    (C) Its temperature
    (D) All above

10. Each cell has a vent cap
    (A) To allow gases out when the cell is on charge
    (B) To add water to the cell if needed
    (C) To check the level of electrolyte
    (D) To do all above functions

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