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Electrolysis And Storage Of Batteries(Engineering > Electrical Engineering ) Questions and Answers
Home
Topic
Engineering
Electrical Engineering
Electrolysis And Storage Of Batteries
Question 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
Explanation:-
Answer: Option B. ->
discharged state
Question 2.
During charging the specific gravity of the electrolyte of a lead-acid battery
increases
decreases
remains the same
becomes zero
Explanation:-
Answer: Option A. ->
increases
Question 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
Explanation:-
Answer: Option B. ->
acid is poured into water
Question 4.
Electrolyte used in a lead-acid cell is
NaOH
only H₂SO₄
only water
dilute H₂SO₄
Explanation:-
Answer: Option D. ->
dilute H₂SO₄
Question 5.
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
Explanation:-
Answer: Option B. ->
always greater than one
Question 6.
Shelf life of a small dry cell is
equal to that of large dry cell
less than that of large dry cell
more than that of large dry cell
none of the above
Explanation:-
Answer: Option B. ->
less than that of large dry cell
Question 7.
The best indication about the state of charge on a lead-acid battery is given by
output voltage
temperature of electrolyte
specific gravity of electrolyte
none of the above
Explanation:-
Answer: Option C. ->
specific gravity of electrolyte
Question 8.
Each cell has a vent cap
to allow gases out when the cell is on charge
to add water to the cell if needed
to check the level of electrolyte
to do all above functions
Explanation:-
Answer: Option D. ->
to do all above functions
Question 9.
The capacity of a lead-acid cell is measured in
amperes
ampere-hours
watts
watt-hours
Explanation:-
Answer: Option B. ->
ampere-hours
Question 10.
The watt-hour efficiency of a lead-acid cell varies between
25 to 35%
40 to 60%
70 to 80%
90 to 95%
Explanation:-
Answer: Option C. ->
70 to 80%
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