Power System - I (3140914) MCQs

MCQs of Neutral Grounding

Showing 1 to 10 out of 31 Questions
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1.
It is  fatal to touch a live wire as
(a) The voltage  may cause burns to the skin
(b) Current may flow through the human body
(c) Current main cause burns to the skin or inside the body
(d) It may cause damage to the heart and  nerve system
Answer:

Option (b)

2.
The size of earth wire is determined on the basis of
(a) Voltage capacity of service line
(b) Current carrying capacity of service line
(c) Atmospheric condition
(d) None of above
Answer:

Option (b)

3.
Isolated neutral system has disadvantage of
(a) Voltage oscillations
(b) Difficulty in earth fault relay
(c) Persistent arcing ground
(d) All of above
Answer:

Option (d)

4.
Isolated neutral transmission system is not recommended as
(a) System insulation is over stressed 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)

5.
Advantage of neutral earthing is
(a) Safety to personnel
(b) Reduction of earth fault current
(c) Elimination of arcing ground
(d) None of above
Answer:

Option (c)

6.
Grounding is done generally at
(a) Receiving end
(b) Supply end
(c) Either at receiving end or at a supply end
(d) None of above
Answer:

Option (b)

7.
Solid earthing is done for voltage below
(a) 400 V
(b) 600 V
(c) 33 KV
(d) 66 KV
Answer:

Option (c)

8.
Resistance earthing is employed for voltage below
(a) 3.3 kV and 11 kV
(b) 11 kV and 33 kV
(c) 33 kV and 66 kV
(d) 66 kV and 132 kV
Answer:

Option (a)

9.
Earthing of transformer neutral through reactance will improve its
(a) Transient stability
(b) Steady state stability
(c) Both (a) and (b)
(d) None of above
Answer:

Option (a)

10.
Which of the following neutral system will require the lightning arrester of least voltage rating
(a) Insulated
(b) Solidly earthed
(c) Resistance earthed
(d) Reactance earthed
Answer:

Option (b)

Showing 1 to 10 out of 31 Questions
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