Basic Electrical Engineering (3110005) MCQs

MCQs of Electrical Installations

Showing 21 to 30 out of 83 Questions
1 2 3 4 5 6
21.
Which of the following protects cable against mechanical injury?
(a) bedding
(b) sheath
(c) Armouring
(d) none of above
Answer:

Option (c)

22.
Which of the following insulation is used in cables?
(a) Varnished cambric
(b) Rubber
(c) Paper
(d) Any of above
Answer:

Option (d)

23.
The thickness of the layer of insulation on the conductor in cables, depends upon
(a) reactive power
(b) power factor
(c) voltage
(d) current carrying capacity
Answer:

Option (c)

24.
The bedding on a cable consists of
(a) hessian cloth
(b) jute
(c) any of above
(d) none of above
Answer:

Option (c)

25.
In a cable immediately above metallic sheath ___________________ is provided.
(a) earthing connection
(b) bedding
(c) armouring
(d) none of above
Answer:

Option (b)

26.
Conduit pipes are normally used to protect ________________ cables.
(a) unsheated cables
(b) armoured
(c) PVC sheated cables
(d) all of above
Answer:

Option (a)

27.
Low tension cables are generally used upto
(a) 200 V
(b) 500 V
(c) 700 V
(d) 1000 V
Answer:

Option (d)

28.
Pressure cables are generally not used beyond
(a) 11 kV
(b) 33 kV
(c) 66 kV
(d) 132 kV
Answer:

Option (c)

29.
Earthing is necessary to give protection against
(a) Danger of electric shock
(b) Voltage fluctuation
(c) Overloading
(d) High temperature of the conductors
Answer:

Option (a)

30.
Solid grounding is addopted for voltages below
(a) 100 V
(b) 200 V
(c) 400 V
(d) 660 V
Answer:

Option (d)

Showing 21 to 30 out of 83 Questions
1 2 3 4 5 6