Q.1
Categories for a transformer earthing of a system neutral are ___
  • a) 2
  • b) 3
  • c) 4
  • d) Many
Q.2
Which of the following neutral earthing method is disadvantageous?
  • a) Neutral solidly earthed
  • b) Neutral earthed via an impedance
  • c) Neutral isolated
  • d) Neutrally
Q.3
Minimum voltage above which electrical system needs to be earthed is _____
  • c) 10 V
  • d) 20 V
  • a) 50 V
  • b) 5 V
Q.4
What is the low voltage range according to the earthing procedures?
  • a) 5 V – 100 V
  • b) 0 V – 100 V
  • c) 50 V – 1000 V
  • d) 0 V – 1000 V
Q.5
Low voltage systems should be solidly earthed.
  • a) True
  • b) False
Q.6
Earthed neutral allows rapid operation of protection to ___________
  • a) Line to line faults
  • b) Earthed faults
  • c) Other faults
  • d) For all faults
Q.7
Which method will reduce the cost of insulation between earth and cables?
  • a) Neutral solidly earthed
  • b) Neutral earthed via an impedance
  • c) Neutral isolated
  • d) Neutrally
Q.8
For an un-earthed line voltage of line to earth can be ______________
  • a) More than line to neutral of earthed system
  • b) Less than line to neutral of earthed system
  • c) Equal to line to neutral of earthed system
  • d) Can’t specify
Q.9
High voltage line is only disadvantageous in ______________
  • a) Small overhead lines
  • b) Small underground lines
  • c) Long overhead lines
  • d) Long underground lines
Q.10
Earth contact material resistance should be ____________
  • a) Less than 2 ohms
  • b) More than 2 ohms
  • c) Depends on the circuit or system
  • d) Very high
Q.11
If parallel arrangement is done the minimum distance between two earthing conductors should be _______
  • a) 10 meters
  • b) 5 meters
  • c) More than or equal to 10 meters
  • d) 2 meters
0 h : 0 m : 1 s