Basic Electrical Engineering (3110005) MCQs

MCQs of Electrical Installations

Showing 71 to 80 out of 83 Questions
5 6 7 8 9
71.
The capacity of a lead-acid cell does not depend on its
(a) temperature
(b) rate of charge
(c) rate of discharge
(d) quantity of active material
Answer:

Option (b)

72.
"The mass of an ion liberated at an electrode is directly proportional to the quantity of electricity".The above statement is associated with
(a) Newton's law
(b) Faraday's law of electromagnetic
(c) Faraday's law of electrolysis
(d) Gauss's law
Answer:

Option (c)

73.
Lead-acid cell has a life of nearly charges and discharges
(a) 500
(b) 700
(c) 1000
(d) 1250
Answer:

Option (d)

74.
Electrolyte used in a lead-acid cell is
(a) NaOH
(b) only H2SO4
(c) only water
(d) dilute H2SO4
Answer:

Option (d)

75.
The open circuit voltage of any storage cell depends wholly upon
(a) its chemical constituents
(b) on the strength of its electrolyte
(c) its temperature
(d) all of the above
Answer:

Option (d)

76.
The specific gravity of electrolyte is measured by
(a) manometer
(b) hygrometer
(c) hydrometer
(d) psychrometer
Answer:

Option (c)

77.
When the specific gravity of the electrolyte of a lead-acid cell is reduced to 1.1 to 1.15 the cell is in
(a) charged state
(b) discharged state
(c) both (a) and (b)
(d) active state
Answer:

Option (b)

78.
Over charging of chemical battery
(a) produces excessive gassing
(b) loosens the active material
(c) increases the temperature resulting in buckling of plates
(d) all of the above
Answer:

Option (d)

79.
Undercharging of chemical batteries
(a) reduces specific gravity of the electrolyte
(b) increases specific gravity of the electrolyte
(c) produces excessive gassing
(d) increases the temperature
Answer:

Option (a)

80.
In a lead-acid cell, lead is called as
(a) positive active material
(b) negative active material
(c) passive material
(d) none of the above
Answer:

Option (b)

Showing 71 to 80 out of 83 Questions
5 6 7 8 9