Power cables types and testing - Electrical Engineering (MCQ) questions and answers

1)   What type of insulated cable is preferred for distribution lines?

a. PVC and XLPE
b. PVC only
c. XLPE only
d. EPR and XLPE
Answer  Explanation 

ANSWER: PVC and XLPE

Explanation:
No explanation is available for this question!
2)   Which test is conducted to confirm the withstanding capabilities of insulation?

a. One minute power frequency withstand test
b. Lightning impulse withstand test
c. Switching impulse withstand test
d. All of these
Answer  Explanation 

ANSWER: All of these

Explanation:
No explanation is available for this question!
3)   Which rubber has the properties of natural rubber?

a. Poly chloroprene
b. Ethylene propylene rubber
c. Silicon rubber
d. All of these
Answer  Explanation 

ANSWER: Ethylene propylene rubber

Explanation:
No explanation is available for this question!
4)   At what rated voltage is the shielded cable provided in a low voltage system?

a. Rated voltage < 1kV
b. Rated voltage < 500V
c. Rated voltage > 1 kV
d. Any of these
Answer  Explanation 

ANSWER: Rated voltage < 1kV

Explanation:
No explanation is available for this question!
5)   What is the use of belting?

a. To hold the three cores and fillers in a tight assembly
b. To hold the single core and fillers in a tight assembly
c. Is used by only two core assembly
d. Both (A) and (B)
Answer  Explanation 

ANSWER: To hold the three cores and fillers in a tight assembly

Explanation:
No explanation is available for this question!
6)   Which among these synthetic rubber is a thermoplastic?

a. Ethylene propylene rubber
b. Polyvinyl chloride
c. Cross linked poly ethylene
d. All of these
Answer  Explanation 

ANSWER: Polyvinyl chloride

Explanation:
No explanation is available for this question!
7)   What should be the voltage applied for polymeric cables during partial discharge test?

a. A 15 minute DC test at a voltage 2Vo
b. A 15 minute DC test at a voltage 8Vo
c. A 15 minute DC test at a voltage 4Vo
d. A 15 minute DC test at a voltage Vo
Answer  Explanation 

ANSWER: A 15 minute DC test at a voltage 4Vo

Explanation:
No explanation is available for this question!
8)   What is the expression for the amplitude of the reflected wave?

a. Ir = [ (R + Z) / (R - Z) ] It
b. Ir = [ (R - Z) / Z ] It
c. Ir = [ (R - Z) / (R + Z) ] It
d. Ir = [ (R + Z) / Z ] It
Answer  Explanation 

ANSWER: Ir = [ (R - Z) / (R + Z) ] It

Explanation:
No explanation is available for this question!
9)   Which method is used for locating cable fault?

a. Bridge method
b. Tracer method
c. Both bridge and tracer method
d. None of these
Answer  Explanation 

ANSWER: Both bridge and tracer method

Explanation:
No explanation is available for this question!
10)   Which among these is a type test?

a. Bending test
b. Drainage test
c. Dielectric security test
d. All of these
e. None of these
Answer  Explanation 

ANSWER: All of these

Explanation:
No explanation is available for this question!

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