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Electrical Engineering
Electrolysis And Storage Of Batteries
Quiz 5
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Q.1
Battery charging equipment is generally installed
In well ventilated location
In clean and dry place
As near as practical to the battery being charged
In location having all above features
Q.2
Batteries are charged by
rectifiers
engine generator sets
motor generator sets
any one of the above methods
Q.3
Trickle charging of a storage battery helps to
maintain proper electrolyte level
increase its reserve capacity
prevent sulphation
keep it fresh and fully charged
Q.4
Which of the following battery is used for aircraft ?
Lead-acid battery
Nickel-iron battery
Dry cell battery
Silver oxide battery
Q.5
On overcharging a battery
It will bring about chemical change in active materials
It will increase the capacity of the battery
It will raise the specific gravity of the electrolyte
None of the above will occur
Q.6
Cells are connected in parallel to
Increase the efficiency
Increase the current capacity
Increase the voltage output
Increase the internal resistance
Q.7
Following will happen if battery charging rate is too high
excessive gassing will occur
temperature rise will occur
bulging and buckling of plates will occur
all above will occur
Q.8
Satellite power requirement is provided through
solar cells
dry cells
nickel-cadmium cells
lead-acid batteries
Q.9
The current flow through electrolyte is due to the movement of
ions
holes
electrons
none of the above
Q.10
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
Q.11
Which of the following primary cells has the highest voltage ?
Manganese-alkaline
Carbon-zinc
Lithium
Mercury
Q.12
Internal resistance of a cell is due to
resistance of electrolyte
electrode resistance
surface contact resistance between electrode and electrolyte
all above
Q.13
Which of the following cell has a reversible chemical reaction ?
Lead-acid
Mercury oxide
Carbon-zinc
Silver-oxide
Q.14
The following indicate that battery on charge has attained full charge
colour of electrode
gassing
specific gravity
all above
Q.15
Electrolyte used in an Edison cell is
NaOH
kOH
HC1
HN03
Q.16
Excessive charging a battery tends to
produce gassing
increase the internal resistance of the battery
to corrode the positive plates into lead peroxide thereby weakening them physically
bring about all above changes
Q.17
In alkaline cell the electrolyte is
dilute sulphuric acid
concentrated sulphuric acid
NaOH
kOH
Q.18
Charging a sulphated battery at high rate results in
boiling of electrolyte due to gassing
warping of plates
damage to separators, cell caps covers and battery case due to excessive temperature
all above
Q.19
Negative plate of an Edison cell is made of
copper
lead
iron
silver oxide
Q.20
Mercury cell has which of the following characteristics?
Flat discharge current-voltage curve
High power to weight ratio
Comparatively longer shelf life under adverse conditions of high temperature and humidity
All of the above
Q.21
The body of Edison cell is made of
bakelite
rubber
nickel plated steel
aluminium
Q.22
Dry cell is modification of
Deniell cell
Leclanche cell
Lead-acid cell
Edison cell
Q.23
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
Q.24
The open circuit voltage of any storage cell depends wholly upon
its chemical constituents
on the strength of its electrolyte
its temperature
all above
Q.25
The effect of sulphation is that the internal resistance
increases
decreases
remains same
none of the above
Q.26
It is noticed that durum charging
there is a rise in voltage
energy is absorbed by the cell
specific gravity of H₂SO₄ is increased
the anode becomes chocolate brown in colour (PbCfe) and cathode becomes grey metallic lead (Pb)
E. all of the above
Q.27
Internal resistance of a cell is reduced by
using vent plug to permit gas formed during discharge
increasing the plate area
putting plates very close together
all above methods
Q.28
Short circuiting of a cell may be caused
buckling of plates
faulty separators
lead particles forming circuit between positive and negative plates
excessive accumulation of sediment
E. any one of above
Q.29
Extent of corrosion in the underground metal work depends upon
amount of moisture
type of metals
type of soil chemicals
all above factors
Q.30
Which among the following constitutes the major load for an automobile battery ?
Brake light
Self starter
Parking lights
Spark plugs
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