Power System - I (3140914) MCQs

MCQs of Electrical Supply Systems

Showing 21 to 30 out of 69 Questions
1 2 3 4 5 6
21.
Feeder is designed from the point of view of
(a) Current carrying capacity
(b) Voltage drop
(c) Operating voltage
(d) Operating frequency
Answer:

Option (a)

22.
Distributor is designed from the point of view of
(a) Current carrying capacity
(b) Voltage drop
(c) Operating voltage
(d) Operating frequency
Answer:

Option (c)

23.
Most suitable way of providing electrical supply to a multi story building is by means of
(a) Ring main
(b) Overhead line
(c) Insulated cable
(d) All of above
Answer:

Option (a)

24.
As per IE rules the maximum allowable variation between declared and actual voltage at consumer's premises should be
(a) ±6 %
(b) ±8 %
(c) ±5 %
(d) ±10 %
Answer:

Option (a)

25.
Permissible variation of frequency in power system is
(a) ±1 %
(b) ±3 %
(c) ±5 %
(d) ±10 %
Answer:

Option (b)

26.
Electrical power can be transmitted by
(a) Overhead system
(b) Underground system
(c) Either (a) or (b)
(d) None of above
Answer:

Option (c)

27.
In India high voltage transmission is mostly done by
(a) Overhead system
(b) Underground system
(c) Either (a) or (b)
(d) None of above
Answer:

Option (a)

28.
Transmission and distribution of electrical power by underground system is superior to overhead system in respect of
(a) Appearance and public safety
(b) Maintenance cost
(c) Failure and accidents
(d) All of above
Answer:

Option (d)

29.
Main drawback of underground system over overhead system is
(a) Exposure to lightning
(b) High initial cost
(c) Exposure to atmosphere hazards
(d) Inductive interference between power and communication line
Answer:

Option (b)

30.
Main drawback of overhead system over underground system is
(a) Less flexible
(b) High charging current
(c) Surge problem
(d) High initial cost
Answer:

Option (c)

Showing 21 to 30 out of 69 Questions
1 2 3 4 5 6