Correct Answer is: varnished cambric

Correct Answer is: polyvinyl chloride

Electrical Cables MCQ Multiple Choice Questions Answers for Practice

Q: 1. A cable carrying alternating current has

Correct Answer is: hysteresis and leakage losses only

Q: 3. Cables are used for 132 kV lines.

Correct Answer is: Extra super voltage

Q: 4. Cables for 220 kV lines are invariably

Correct Answer is: compressed oil or compressed gas insulated

Q: 6. Capacitance grading of cable implies

Correct Answer is: use of dielectrics of different permeabilities

Q: 7. Conduit pipes are normally used to protect..............cables.

Correct Answer is: unsheathed cables

Q: 14. If the length of a cable is doubled, its capacitance

Correct Answer is: becomes double

Q: 16. In a cable the voltage stress is maximum at

Correct Answer is: core of the conductor

Q: 17. In a cable, the maximum stress under operating conditions is at

Correct Answer is: conductor surface

Q: 18. In cables the charging current

Correct Answer is: leads the voltage by 90Â°

1. A cable carrying alternating current has

hysteresis losses only
hysteresis and leakage losses only
hysteresis, leakage and copper losses only
hysteresis, leakage, copper and friction losses

2. A certain cable has an insulation of relative permittivity 4. If the insulation is replaced by one of relative permittivity 2, the capacitance of the cable will become

one half
double
four times
none of the above

3. Cables are used for 132 kV lines.

High tension
Super tension
Extra high tension
Extra super voltage

4. Cables for 220 kV lines are invariably

mica insulated
paper insulated
compressed oil or compressed gas insulated
rubber insulated

5. Cables, generally used beyond 66 kV are

oil filled
S.L. type
belted
armoured

6. Capacitance grading of cable implies

use of dielectrics of different permeabilities
grading according to capacitance of cables per km length
cables using single dielectric in different concentrations
capacitance required to be introduced at different lengths to counter the effect of inductance

7. Conduit pipes are normally used to protect..............cables.

unsheathed cables
armoured
PVC sheathed cables
all of the above

8. Copper as conductor for cables is used as

annealed
hardened and tempered
hard drawn
alloy with chromium

9. Dielectric strength of rubber is around

5 kV/mm
15 kV/mm
30 kV/mm
200 kV/mm

10. Empire tape is

varnished cambric
vulcanised rubber
impregnated paper
none of the above

11. High tension cables are generally used upto

11kV
33kV
66 kV
132 kV

12. If a cable of homogeneous insulation has a maximum stress of 10 kV/mm, then the dielectric strength of insulation should be

5 kV/mm
10 kV/mm
15 kV/mm
30 kV/mm

13. If a power cable and a communication cable are to run parallel the minimum distance between the two, to avoid interference, should be

2 cm
10 cm
50 cm
400 cm

14. If the length of a cable is doubled, its capacitance

becomes one-fourth
becomes one-half
becomes double
remains unchanged

15. In a cable immediately above metallic sheath.............is provided.

earthing connection
bedding
armouring
none of the above

16. In a cable the voltage stress is maximum at

sheath
insulator
surface of the conductor
core of the conductor

17. In a cable, the maximum stress under operating conditions is at

insulation layer
sheath
armour
conductor surface

18. In cables the charging current

lags the voltage by 90Â°
leads the voltage by 90Â°
lags the voltage by 180Â°
leads the voltage by 180Â°

19. In capacitance grading of cables we use a....................dielectric

composite
porous
homogeneous
hygroscopic

20. In case of three core flexible cable the colour of the neutral is

blue
black
brown
none of the above

21. In single core cables armouring is not done to

avoid excessive sheath losses
make it flexible
either of the above
none of the above

22. In the cables, sheaths are used to

prevent the moisture from entering the cable
provide enough strength
provide proper insulation
none of the above

23. In the cables, the location of fault is usually found out by comparing

the resistance of the conductor
the inductance of conductors
the capacitances of insulated conductors
all above parameters

24. Is a cable is to be designed for use on 1000 kV, which insulation would you prefer ?

Polyvinyle chloride
Vulcanised rubber
Impregnated paper
Compressed SFe gas

25. Low tension cables are generally used upto

200 V
500 V
700 V
1000 V

26. Pressure cables are generally not used beyond

11 kV
33 kV
66 kV
132 kV

27. PVC stands for

polyvinyl chloride
post varnish conductor
pressed and varnished cloth
positive voltage conductor

28. Solid type cables are considered unreliable beyond 66 kV because

insulation may melt due to higher temperature
skin effect dominates on the conducÂ¬tor
of corona loss between conductor and sheath material
there is a danger of breakdown of insulation due to the presence of voids

29. The advantage of cables over overhead transmission lines is

easy maintenance
low cost
can be used in congested areas
can be used in high voltage circuits

30. The advantage of oil filled cables is

more perfect impregnation
smaller overall size
no ionisation, oxidation and formation of voids
all of the above

Electrical Cables MCQs are essential practice tools for students and exam aspirants. These multiple-choice questions help reinforce your understanding of key concepts and prepare you for various assessments.

About Electrical Cables MCQ Questions

Electrical Cables MCQs cover a wide range of topics, including types of cables, their construction, insulation materials, and applications. These questions are designed to test your knowledge of the physical properties, electrical characteristics, and installation practices of different cables. By practicing these questions, you will gain a deeper understanding of how electrical cables function and their role in various electrical systems.

Why Practice Electrical Cables Objective Questions?

Practicing Electrical Cables MCQs offers several benefits. It helps you prepare for school and college exams, competitive exams, and job interviews. Regular practice enhances your problem-solving skills, improves your recall of important concepts, and boosts your confidence. These questions are also useful for revision and self-assessment, ensuring you are well-prepared for any electrical engineering challenge.

Who Should Use These MCQs?

Students preparing for school or college exams
Competitive exam aspirants
Candidates preparing for interviews