Top 100 MCQ Battery
Battery: [ ISRO,DRDO,DMRC,SAIL, ODNANCE, HAL, WBSEDCL, RAILWAY & Others competitive] – top mcq of battery
11. Which of the following cell has a reversible chemical reaction ?
A. Lead-acid
B. Mercury oxide
C. Carbon-zinc
D. Silver-oxide
Ans. A
12. 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
Ans. d
13. Battery charging equipment is generally installed
A. In well ventilated location
B. In clean and dry place
C. As near as practical to the battery being charged
D. In location having all above features
Ans. d
14. The effect of sulphation is that the internal resistance
A. increases
B. decreases
C. remains same
D. none of the above
Ans. A
15. 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%
Ans. D
16. Satellite power requirement is provided through
A. solar cells
B. dry cells
C. nickel-cadmium cells
D. lead-acid batteries
Ans. A
17. Internal resistance of a cell is due to
A. resistance of electrolyte
B. electrode resistance
C. surface contact resistance between electrode and electrolyte
D. all above
Ans. D
18. During the charging of a lead-acid cell
A. its voltage increases
B. it gives out energy
C. its cathode becomes dark chocolate brown in colour
D. specific gravity of H₂SO₄ decreases
Ans. A
19. For a cell to work, which of the following condition(s) become necessary ?
A. Two electrodes of different meta’s should be inserted in the electrolyte, not touching each other
B. Electrolyte must chemically react with one of the electrodes
C. Electrolyte liquid or paste should be conducting
D. All above three conditions are necessary
Ans. D
20. 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
Ans. D
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Top 100 MCQ Battery
Battery: [ ISRO,DRDO,DMRC,SAIL, ODNANCE, HAL, WBSEDCL, RAILWAY & Others competitive]-mcq of battery
1.When the specific gravity of the electrolyte of a lead-acid cell is reduced to 1.1 to 1.15 the cell is in
- charged state
- discharged state
- both (A) and (B)
- active state
Ans . B
2.during charging the specific gravity of the electrolyte of a lead-acid battery
- increases
- decreases
- remains the same
- becomes zero
Ans . A
3.While preparing electrolyte for a lead-acid battery
- water is poured into acid
- acid is poured into water
- anyone of the two can be added to other chemical
- none of the above
Ans . B
4.The ratio of ampere-hour efficiency to watt-hour efficiency of a lead-acid cell is
- just one
- always greater than one
- always less than one
- none of the above
Ans . B
5.Electrolyte used in a lead-acid cell is
- NaOH
- only H₂SO₄
- only water
- dilute H₂SO₄
Ans . D
6. Shelf life of a small dry cell is
A. equal to that of large dry cell
B. less than that of large dry cell
C. more than that of large dry cell
D. none of the above
Ans. B
7. The best indication about the state of charge on a lead-acid battery is given by
A. output voltage
B. temperature of electrolyte
C. specific gravity of electrolyte
D. none of the above
Ans. C
8. 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
Ans. D
9. The capacity of a lead-acid cell is measured in
A. amperes
B. ampere-hours
C. watts
D. watt-hours
Ans. B
10. The watt-hour efficiency of a lead-acid cell varies between
A. 25 to 35%
B. 40 to 60%
C. 70 to 80%
D. 90 to 95%
Ans. c
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