Q.1
Which of the following is not the type of earthing :-
  • System Earthing
  • Equipment Earthing
  • earthing device
  • None
Q.2
"Soil resistivity" & “Resistance” are :-
  • Same thing
  • Different
  • Could not be predict
  • None
Q.3
"Soil resistivity" & “Resistance” are :-
  • Same thing
  • Different
  • Could not be predict
  • None
Q.4
Physiological Effects of 4 A AC Current in Human Body:-
  • Barely perceptible
  • Painful sensation
  • Heart paralysis
  • None
Q.5
Earthing & Grounding are :-
  • Same
  • Different
  • Same in some part of India & different in some other part of India
  • None
Q.6
Which of the following is not correct about Earthing :-
  • To provide a sufficiently low impedance path to facilitate satisfactory Protective system operation under fault conditions.
  • To ensure that living beings are not exposed to unsafe potentials
  • It is not possible to operate the electrical system without Earthing
  • None
Q.7
Earth wire or gorund wire is made of
  • copper
  • alunimium
  • iron
  • GI
Q.8
Generally earthing is provided for
  • safety of equipment
  • safety of operating person
  • both a & b
  • None of the above
Q.9
When earth faults occurs
  • voltage potential at the earth mat increses due to earthing
  • voltage potential at the earth mat decreses due to earthing
  • voltage potential at the earth mat remains zero due to earthing
  • None of the above
Q.10
Which one of the following is used in earth pit:
  • Aluminum and Iron
  • Graphite and Silver
  • Graphite and magnesium
  • Salt and charcoal
Q.11
The earthing rod orientation in the pit should be:
  • 45°
  • Horizontal
  • Vertical
  • 75°
Q.12
The earth's potential is taken as
  • infinite
  • supply voltage
  • 1 volt
  • zero
Q.13
The size of the earth or ground wire is based on the
  • maximum fault current carrying through the ground wire
  • rated current carrying capacity of the service line
  • depends on the soil resistance
  • both (A) and (C)
Q.14
Earth wire or ground wire is made of
  • copper
  • aluminium
  • iron
  • galvanized steel
Q.15
Average resistance of human body is
  • 500 ohms
  • 1000 ohms
  • 1500 ohms
  • 2000 ohms
0 h : 0 m : 1 s