MCQs of Electrical Installations (Basic Electrical Engineering - 3110005)

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

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

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

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

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

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

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

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

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

60.

The capacity of a lead-acid cell is measured in

(a)	amperes
(b)	ampere-hours
(c)	watts
(d)	watt-hours

Showing 51 to 60 out of 83 Questions