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
0 h : 0 m : 1 s