Power System - I (3140914) MCQs

MCQs of Substations

Showing 81 to 90 out of 103 Questions
6 7 8 9 10 11
81.
The control system in substations generally operates at
(a) 110 V
(b) 220 V
(c) 400 V
(d) Both (a) and (b)
Answer:

Option (d)

82.
Carrier current equipment installed in substation is used for
(a) Relaying
(b) Communication
(c) Supervisory control
(d) All of above
Answer:

Option (d)

83.
The indicating and metering instruments used in substations are
(a) Ammeters and voltmeters
(b) Power factor meters
(c) kWh, KVARh and kVAh meters
(d) All of above
Answer:

Option (d)

84.
Batteries are used in substation
(a) For emergency lighting
(b) To supply operating and control circuits
(c) To supply protective relaying systems
(d) All of above
Answer:

Option (d)

85.
Which of the following is closed after line is disconnected from the supply?
(a) Isolator
(b) Earth switch
(c) Circuit breaker
(d) Relay
Answer:

Option (b)

86.
Which of the following is closed first for supplying power after repair or maintenance?
(a) Isolator
(b) Earth switch
(c) Circuit breaker
(d) Relay
Answer:

Option (a)

87.
A charging current is discharge through_____ after the line is disconnected from the main supply?
(a) Earth switch
(b) Circuit breaker
(c) Isolator
(d) Relay
Answer:

Option (a)

88.
Which of the following equipment is not installed at substation?
(a) Exciter
(b) Series capacitor
(c) Shunt reactor
(d) Voltage transformers
Answer:

Option (a)

89.
Which of the following equipment is used to limit short circuit current level in a substation?
(a) Isolator
(b) Lightning arrester
(c) Coupling capacitor
(d) Series reactor
Answer:

Option (d)

90.
Stones are provided in the substation
(a) To avoid fire accident by draining oil from transformer if leaks
(b) To avoid growing of weeds and plants
(c) To provide insulation
(d) All of above
Answer:

Option (d)

Showing 81 to 90 out of 103 Questions
6 7 8 9 10 11