Basic Electrical Engineering (3110005) MCQs

MCQs of Electrical Installations

Showing 51 to 60 out of 83 Questions
51.
The capacity of a battery is expressed in terms of
(a) current rating
(b) voltage rating
(c) ampere-hour rating
(d) none of the above
Answer:

Option (c)

52.
Five 2 V cells are connected in parallel.The output voltage is
(a) 1 V
(b) 1.5 V
(c) 1.75 V
(d) 2 V
Answer:

Option (d)

53.
During the charging and discharging of a nickel-iron cell
(a) corrosive fumes are produced
(b) water is neither formed nor absorbed
(c) nickel hydroxide remains unsplit
(d) its e.m.f. remains constant
Answer:

Option (b)

54.
As compared to constant-current system, the constant-voltage system of charging a lead acid cell has the advantage of
(a) reducing time of charging
(b) increasing cell capacity
(c) both (a) and (b)
(d) avoiding excessive gassing
Answer:

Option (c)

55.
A dead storage battery can be revived by
(a) adding
(b) adding so-called battery restorer
(c) a dose of H2SO44
(d) none of above
Answer:

Option (d)

56.
As compared to a lead-acid cell, the efficiency of a nickel-iron cell is less due to its
(a) compactness
(b) lower e.m.f
(c) small quantity of electrolyte used
(d) higher internal resistance
Answer:

Option (d)

57.
Trickle charging of a storage battery helps to
(a) maintain proper electrolyte level
(b) increase its reserve capacity
(c) prevent sulphation
(d) keep it fresh and fully charged
Answer:

Option (d)

58.
Those substances of the cell which take active part in chemical combination and hence produce electricity during charging or discharging are known as ____________ materials.
(a) passive
(b) active
(c) redundant
(d) inert
Answer:

Option (b)

59.
It is noticed that durmg charging
(a) there is a rise in voltage
(b) energy is absorbed by the cell
(c) specific gravity of H2SO4 is increased
(d) all of the above
Answer:

Option (d)

60.
The capacity of a lead-acid cell is measured in
(a) amperes
(b) ampere-hours
(c) watts
(d) watt-hours
Answer:

Option (b)

Showing 51 to 60 out of 83 Questions