100 TOP Electrolysis and Storage of Batteries Multiple choice Questions and Answers pdf

71. If a battery is wrongly connected on charge following will happen
(a) current delivered by the  battery will be high
(b) current drawing will be nil
(c) current drawing will be very small
(d) current drawing will be very high
Ans: d

72. 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

73. If a lead-acid cell is discharged below 1.8 V the following will happen.
(a) Capacity of cell will reduce
(b) Sulphation of plates will occur
(c) Internal resistance will increase
(d) All above will occur
Ans: d

74. Life of the batteries is in the following ascending order.
(a) Lead-acid cell, Edison cell, Nickel cadmium cell
(b) Lead-acid cell, Nickel-cadmium cell, Edison cell
(c) Edison cell, Nickel-cadmium cell, lead-acid cell
(d) Nickel-cadmium cell, Edison cell, lead-acid cell
Ans: a

75. Persons preparing electrolyte should wear
(a) goggles or other face shield
(b) rubber
(c) rubber boots and gloves
(d) all above safety devices
Ans: d

76. Excessive charging a battery tends to
(a) produce gassing
(b) increase the internal resistance of the battery
(c) to corrode the positive plates into lead peroxide thereby weakening them physically
(d) bring about all above changes
Ans: d

77. Shelf life of a small dry cell is
(a)     equal to that of large dry cell
(6)     less than that of large dry cell
(c) more than that of large dry cell
(d) none of the above
Ans: b

78. The current flow through electrolyte is due to the movement of
(a)     ions
(b)     holes
(c) electrons
(d) none of the above
Ans: a

79. Level of electrolyte in a cell should be _____ the level of plates
(a)     below
(b)     equal to
(c) above
(d) none of the above
Ans: c

80. During discharge, the active material of both the positive and negative plates is changed to
(a) Pb
(b) Pb02
(c) PbO
(d) PbS04
Ans: d

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