Power System - I (3140914) MCQs

MCQs of Neutral Grounding

Showing 21 to 30 out of 31 Questions
1 2 3 4
21.
The earth wire should be
(a) Good conductor of electricity
(b) Mechanical strong
(c) Both (a) and (b)
(d) Mechanical is strong but bad conductor of electricity
Answer:

Option (c)

22.
Earth wires are made of
(a) Copper
(b) Aluminum
(c) Iron
(d) Galvanized stranded steel
Answer:

Option (d)

23.
The size of the earth wire is determined on the basis of
(a) Voltage of the service line
(b) Current carrying capacity of the service line
(c) Atmospheric condition
(d) None of above
Answer:

Option (b)

24.
The earth wire should not be of size smaller than
(a) 10 SWG copper
(b) 8 SWG copper
(c) 6 SWG copper
(d) 4 SWG copper
Answer:

Option (a)

25.
Neutral earthing is provided for
(a) Safety of equipment and personal against the lightning and voltage surges
(b) Reducing the voltage stress on line and equipment with respect to earth under various operating and fault conditions
(c) Controlling the earth fault current for protective relaying
(d) Both (a) and (d)
Answer:

Option (d)

26.
Isolated neutral system has the disadvantage of
(a) Voltage oscillation
(b) Difficult earth fault relaying
(c) Persistent arcing ground
(d) All of above
Answer:

Option (d)

27.
Isolated neutral transmission system is not recommended as the
(a) System insulation is over stress due to over voltages
(b) Insulation over stress may lead to its failure resulting in phase to phase fault
(c) System is not adequately protected against earth fault
(d) All of above
Answer:

Option (d)

28.
Neutral earthing has the advantage of
(a) Elimination of arcing grounds
(b) Low maintenance and operating cost over isolated neutral system
(c) Simplified design of earth fault protection
(d) All of above
Answer:

Option (d)

29.
The advantage of neutral earthing is
(a) Safety of personnel
(b) Reduction of earth fault current
(c) Elimination of arcing ground
(d) None of above
Answer:

Option (c)

30.
The neutral of power system may be connected to earth
(a) Directly
(b) Through register
(c) Through inductor
(d) Any of above
Answer:

Option (d)

Showing 21 to 30 out of 31 Questions
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