Testing and Commissioning of Electrical Equipments (2180901) MCQs

MCQs of Safety Management

Showing 61 to 70 out of 93 Questions
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61.
__________ Shock current will cause rapid, uncoordinated series of contractions of heart muscles causing an irregular heartbeat (fibrillation) and possible death.
(a) 10 - 20 mA
(b) 20 - 40 mA
(c) 40 - 80 mA
(d) > 100 mA
Answer:

Option (c)

62.
Which of the following will cause if above 100 mA electric shock current flow through the body.
(a) Burns & Muscles contractions
(b) stoppage of heart
(c) Death
(d) All of these
Answer:

Option (d)

63.
Which of the following should you NOT do if a person is in contact with a source of electricity and suffering from electrical shock?
(a) Call 108
(b) If safe, turn off the power or source of electricity
(c) Touch him or her directly with your body
(d) Use a safe object to move the source of electricity
Answer:

Option (c)

64.
When moving a source of electricity away from a victim of electrical shock, you can use an object made of which of the following materials?
(a) Cardboard
(b) Plastic
(c) Wood
(d) All of these
Answer:

Option (d)

65.
Current flow from hand to hand is called
(a) Amperage
(b) Step potential
(c) Touch potential
(d) None of these
Answer:

Option (c)

66.
Which of the following will be affected by Electrical shock?
(a) tissue
(b) muscle
(c) internal organs
(d) All of these
Answer:

Option (d)

67.
The size of the earth or ground wire is based on the
(a) maximum fault current carrying through the ground wire
(b) the rated current carrying capacity of the service line
(c) depends on the soil resistance
(d) both (a) and (c)
Answer:

Option (d)

68.
Earth wire or ground wire is made of
(a) copper
(b) aluminium
(c) iron
(d) galvanized steel
Answer:

Option (a)

69.
Generally grounding is provided for
(a) only for the safety of the equipment
(b) only for the safety of the operating personnel
(c) for the safety of the equipment and operating personnel
(d) none of these
Answer:

Option (c)

70.
When earth fault occurs
(a) voltage potential at the earth mat increases due to grounding
(b) voltage potential at the earth mat decreases due to grounding
(c) voltage potential at the earth mat remains zero irrespective of fault
(d) none of the above
Answer:

Option (a)

Showing 61 to 70 out of 93 Questions
4 5 6 7 8 9