Electrical Electrolysis Online Practice Test - Set 02 - ObjectiveBooks

Electrical Electrolysis Online Practice Test - Set 02

Practice Test: Question Set - 02


1. Internal resistance of a cell is reduced by
    (A) Using vent plug to permit gas formed during discharge
    (B) Increasing the plate area
    (C) Putting plates very close together
    (D) All above methods

2. If a battery is wrongly connected on charge following will happen
    (A) Current delivered by the battery will be high
    (B) Current drawing will be nil
    (C) Current drawing will be very small
    (D) Current drawing will be very high

3. The following indicate that battery on charge has attained full charge
    (A) Color of electrode
    (B) Gassing
    (C) Specific gravity
    (D) All above

4. Hydrogen evolved during charging produces explosive mixture when it is more than
    (A) 2 %
    (B) 4 %
    (C) 6 %
    (D) 8 %

5. Under normal charging rate, the charging current should be
    (A) 10% of capacity
    (B) 20% of capacity
    (C) 30% of capacity
    (D) 40% of capacity

6. The ratio of ampere-hour efficiency to watt-hour efficiency of a lead-acid cell is
    (A) Just one
    (B) Always greater than one
    (C) Always less than one
    (D) None of the above

7. As compared to constant-current system, the constant-voltage system of charging a lead acid cell has the advantage of
    (A) Reducing time of charging
    (B) Increasing cell capacity
    (C) Both (A) and (B)
    (D) Avoiding excessive gassing

8. The capacity of a lead-acid cell is measured in
    (A) Amperes
    (B) Ampere-hours
    (C) Watts
    (D) Watt-hours

9. Negative plate of an Edison cell is made of
    (A) Copper
    (B) Lead
    (C) Iron
    (D) Silver oxide

10. Following will occur if level of electrolyte falls below plates
    (A) Capacity of the cell is reduced
    (B) Life of the cell is reduced
    (C) Open plates are converted to lead sulphate
    (D) All above

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