A. Two electrodes of different metas should be inserted in the electrolyte, not touching each other
C. Electrolyte must chemically react with one of the electrodes
D. Electrolyte liquid or paste should be conducting
A. reduced gassing on charge
B. abnormal high temperature
C. low sp. gravity electrolyte
A. the anode becomes chocolate brown in colour (PbCfe) and cathode becomes grey metallic lead (Pb)
C. energy is absorbed by the cell
D. specific gravity of H2SO4 is increased
E. there is a rise in voltage
A. specific gravity of H2SO4 decreases
C. its cathode becomes dark chocolate brown in colour
D. it gives out energy
B. equal to
C. none of the above
D. below
B. Brake light
C. Parking lights
D. Spark plugs
A. both anode and cathode become PbS04
B. specific gravity of H2SO4 decreases
C. voltage of the cell decreases
D. the cell absorbs energy
A. lower e.m.f.
C. small quantity of electrolyte used
D. compactness
A. its chemical constituents
B. its temperature
C. on the strength of its electrolyte
A. none of the above
B. unaffected by the type of discharge
D. more when it is supplying current for continuous periods
B. none of the above
C. equal to that of large dry cell
D. more than that of large dry cell
A. very little
B. less
D. no
B. passive material
D. positive active material
A. decreases
B. remains constant
B. 2 V
C. 0.1V
D. 1.1 V
A. breakdown of one or more separators
B. excess accumulation of sediment at the bottom of the cell
C. both (A) and (B)
D. none of the above
A. reddish
B. bright
C. dull
A. Nickel-cadmium cell, Edison cell, lead-acid cell
B. Lead-acid cell, Nickel-cadmium cell, Edison cell
C. Edison cell, Nickel-cadmium cell, lead-acid cell
A. 0.8
B. 1.1
C. 0.95
A. as near as practical to the battery being charged
B. in clean and dry place
D. in well ventilated location
A. current drawing will be very small
B. current delivered by the battery will be high
C. current drawing will be nil
B. maintain proper electrolyte level
C. prevent sulphation
D. increase its reserve capacity
A. 4 parts of acid to 4 parts of water
C. 6 parts of acid to 4 parts of water
D. 4 parts of acid to 8 parts of water
D. remains same
A. Faradays law of electromagnetic
C. Gausss law
D. Newtons law
A. a dose of H2SO4
C. adding so-called battery restorer
D. adding distilled water
A. to add water to the cell if needed
B. to check the level of electrolyte
C. to allow gases out when the cell is on charge
B. Loss of life
C. Corrosion of the grids of the plate
D. Loss of capacity
A. low level of electrolyte
C. persistent undercharging
D. allowing a battery to stand in discharged condition for a long time
E. topping up with electrolyte
A. increase the life of the cells
D. increase the current rating
A. to reduce evaporation of water from electrolyte
B. to exclude dirt and foreign matter from the electrolyte
D. to discharge none of the above functions
A. water is poured into acid
B. anyone of the two can be added to other chemical
B. 1.75 V
C. 1 V
D. 1.5 V
A. Temperature of surroundings
B. Specific gravity of electrolyte
C. Rate of discharge
A. it will increase the capacity of the battery
C. it will raise the specific gravity of the electrolyte
D. it will bring about chemical change in active materials
B. passive
C. inert
D. dielectric
A. 70%
B. 40%
D. 60%
A. equal to
C. more than
A. voltage rating
B. current rating
A. Efficiency of the circuit
C. Current
D. Voltage across the load resistance
A. they have same ampere-hour capacity
B. they have identical internal resistance
D. they have same make
A. passive
C. redundant
D. inert
B. 24
C. 12
D. 16
B. viscosity
C. mass
D. colour
B. concentrated sulphuric acid
C. NaOH
D. dilute sulphuric acid
A. Capacity of cell will reduce
C. Internal resistance will increase
D. Sulphation of plates will occur
A. A primary cell has an irreversible chemical reaction
C. A lead-acid cell can be recharged
D. A storage cell has a reversible chemical reaction
A. electrons
D. holes
A. 2 V
C. 2.1 V
D. 1.9 V
A. a mechanical gauge
B. psychrometer
C. manometer
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