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TOPIC NAME:- WIRE AND CABLE (BY N.K.RATHOD WIREMAN INSTRUCTOR)-MCQ-1

1) The thickness of the layer of insulation on the conductor, in cables, depends upon

3 points

A) reactive power

B) power factor

C) voltage

D) current carrying capacity

Other:

Clear selection

2) Which of the following protects a cable against mechanical injury?

3 points

A) Bedding

B) Sheath

C) Armouring

D) None of the above

Other:

Clear selection

3) Which of the following insulation is used in cables?

3 points

A) Varnished cambric

B)Rubber

C) Paper

D) Any of the above

Other:

Clear selection

4) PVC stands for

3 points

A) polyvinyl chloride

B) post varnish conductor

C) pressed and varnished cloth

D) positive voltage conductor

Clear selection

5) In a cable, the maximum stress under operating conditions is at

3 points

A) insulation layer

B) sheath

C) armour

D) conductor surface

Other:

Clear selection

6) Cables, generally used beyond 66 kV are

3 points

A) oil filled

B) S.L. type

C) belted

D) armoured

Other:

Clear selection

7) The surge resistance of cable is

3 points

A) 5 ohms

B) 20 ohms

C) 50 ohms

D) 100 ohms

Clear selection

8) The current carrying capacity of cables in D.C. is more than that in A.C. mainly due to

3 points

A) absence of harmonics

B) non-existence of any stability limit

C) smaller dielectric loss

D) absence of ripples

Clear selection

9) Pressure cables are generally not used beyond

3 points

A) 11 kV

B) 33 kV

C) 66 kV

D) 132 kV

Clear selection

10) The minimum dielectric stress in a cable is at

3 points

A) armour

B) bedding

C) conductor surface

D) lead sheath

Clear selection

11) Conduit pipes are normally used to protect _____ cables

3 points

A) unsheathed cables

B) armoured

C) PVC sheathed cables

D) all of the above

Clear selection

12) Dielectric strength of rubber is around

3 points

A) 5 kV/mm

B) 15 kV/mm

C) 30 kV/mm

D) 200 kV/mm

Clear selection

13) In a cable immediately above metallic sheath _____ is provided

3 points

A) earthing connection

B) bedding

C) armouring

D) none of the above

Clear selection

14) In the case of three core flexible cable, the color of the neutral is

3 points

A) blue

B) black

C) brown

D) none of the above

Clear selection

15) High tension cables are generally used up to

3 points

A) 11kV

B) 33kV

C) 66 kV

D) 132 kV

Clear selection

16) In single-core cables armoring is not done to

3 points

A) either of the above

B) none of the above

C) make it flexible

D) avoid excessive sheath losses

Clear selection

17) The bedding on a cable consists of

3 points

A) hessian cloth

B) jute

C)any of the above

D) none of the above

Clear selection

18) The insulating material for cables should

3 points

A) be acid proof

B) be non-inflammable

C) be non-hygroscopic

D) have all above properties

Clear selection

19) Empire tape is

3 points

A)varnished cambric

B) vulcanised rubber

C) impregnated paper

D) none of the above

Clear selection

20) The material for armouring on cable is usually

3 points

A) steel tape

B) galvanised steel wire

C) any of the above

D) none of the above

Clear selection

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