Battery And Electrolysis | MCQs | Electrical ViVa Questions
There are Questions and Answers of battery and electrolysis provide which is more important to ask in viva and more important for interview questions and also in gate examination preparation.
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| Battery And Electrolysis | MCQs | Electrical ViVa Questions |
Q.1
In constant-current charging method,
the supply voltage from discharged to
fully charged condition
(a)decreases
(b)increases
(c)remains constant
(d)none of the above
Ans.
(b)increases
Q.2
Battery charging equipment is general-
ly 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)in location having all above features
Q.3
7.63.Followmg will happen if the specific
gravity of electrolyte becomes more
than 1.23
(a)Loss of capacity
(b)Loss of life
(c)Corrosion of the grids of the plate
(d)All above
Ans.
(d)All above
Q.4
Batteries are charged by
(a)rectifiers
(b)engine generator sets
(c)motor generator sets
(d)any one of the above methods
Ans.
(d)any one of the above methods
Q.5
Cell short circuit results in
(a)low sp. gravity electrolyte
(b)abnormal high temperature
(c)reduced gassing on charge
(d)all above
Ans.
(d)all above
Q.6
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)all above methods
Q.7
Capacity of dry cells is
(a)more when it is supplying current
for intermittent periods
(b)more when it is supplying current
for continuous periods
(c)unaffected by the type of discharge
(d)none of the above
Ans.
(a)more when it is supplying current
for intermittent periods
Q.8
Battery container should be acid resis-
tance, therefore it is made up of
(a)glass
(b)plastic
(c)wood
(d)all above
Ans.
(d)all above
Q.9
Sulphated cells are indicated by
(a)the loss of capacity of the cell
(b)the decrease of the specific gravity
(c)the low voltage of the cell on dis-
charge
(d)all above conditions
Ans.
(d)all above conditions
Q.10
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
Ans.
(c)4 parts of acid to 6.parts of water
Q.11
Local action in a battery is indicated by
(a)excessive gassing under load conditions
(b)excessive drop in the specific
gravity of electrolyte even when the
cell is on open circuit
(c)both(a)and (b).
(d)none of the above'.
Ans.
(d)none of the above
Q.12
Following will happen if battery charg-
ing rate is too high
(a)excessive gassing will occur
(b)temperature rise will occur
(c)bulging and buckling of plates will
occur
(d)all above will occur.
Ans.
(d)all above will occur.
Q.13
Internal resistance of a cell is due to
(a)resistance of electrolyte
(6)electrode resistance
(c)surface contact resistance between
electrode and electrolyte
(d)all above
Ans.
(d)all above
Q.14
If a battery is wrongly connected on
charge following will happen
(a)current delivered by the battery
will be high
(6)current drawing will be nil
(c)current drawing will be very small
(d)current drawing will be very high
Ans.
(d)current drawing will be very high
Q.15
In order that a hydrometer may float
vertically in electrolyte its C.G. should
be
(a)lowered
(b) raised
(c)undisturbed
(d)displaced sideways
Ans.
(a)lowered
In constant-current charging method,
the supply voltage from discharged to
fully charged condition
(a)decreases
(b)increases
(c)remains constant
(d)none of the above
Ans.
(b)increases
Q.2
Battery charging equipment is general-
ly 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)in location having all above features
Q.3
7.63.Followmg will happen if the specific
gravity of electrolyte becomes more
than 1.23
(a)Loss of capacity
(b)Loss of life
(c)Corrosion of the grids of the plate
(d)All above
Ans.
(d)All above
Q.4
Batteries are charged by
(a)rectifiers
(b)engine generator sets
(c)motor generator sets
(d)any one of the above methods
Ans.
(d)any one of the above methods
Q.5
Cell short circuit results in
(a)low sp. gravity electrolyte
(b)abnormal high temperature
(c)reduced gassing on charge
(d)all above
Ans.
(d)all above
Q.6
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)all above methods
Q.7
Capacity of dry cells is
(a)more when it is supplying current
for intermittent periods
(b)more when it is supplying current
for continuous periods
(c)unaffected by the type of discharge
(d)none of the above
Ans.
(a)more when it is supplying current
for intermittent periods
Q.8
Battery container should be acid resis-
tance, therefore it is made up of
(a)glass
(b)plastic
(c)wood
(d)all above
Ans.
(d)all above
Q.9
Sulphated cells are indicated by
(a)the loss of capacity of the cell
(b)the decrease of the specific gravity
(c)the low voltage of the cell on dis-
charge
(d)all above conditions
Ans.
(d)all above conditions
Q.10
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
Ans.
(c)4 parts of acid to 6.parts of water
Q.11
Local action in a battery is indicated by
(a)excessive gassing under load conditions
(b)excessive drop in the specific
gravity of electrolyte even when the
cell is on open circuit
(c)both(a)and (b).
(d)none of the above'.
Ans.
(d)none of the above
Q.12
Following will happen if battery charg-
ing rate is too high
(a)excessive gassing will occur
(b)temperature rise will occur
(c)bulging and buckling of plates will
occur
(d)all above will occur.
Ans.
(d)all above will occur.
Q.13
Internal resistance of a cell is due to
(a)resistance of electrolyte
(6)electrode resistance
(c)surface contact resistance between
electrode and electrolyte
(d)all above
Ans.
(d)all above
Q.14
If a battery is wrongly connected on
charge following will happen
(a)current delivered by the battery
will be high
(6)current drawing will be nil
(c)current drawing will be very small
(d)current drawing will be very high
Ans.
(d)current drawing will be very high
Q.15
In order that a hydrometer may float
vertically in electrolyte its C.G. should
be
(a)lowered
(b) raised
(c)undisturbed
(d)displaced sideways
Ans.
(a)lowered
