Sign In / Sign Up

D.C. Generators MCQ Electrical Engineering

Attempt now to check your rank among 31 students! 50 Questions 30 Mins

About D.C. Generators

Following are some of the multiple choice questions on the D.C. Generators with answers that will help the students in developing their knowledge.

D.C. Generators MCQ

1. What is Superman's birth name?

nal-el
kal-el
mal-el
dal-el

2. Cables, generally used beyond 66 kV are

oil filled
S.L. type
belted
armoured

3. The metallic sheath may be made of lead or lead alloy or of aluminium.

Yes
No
none
none

4. Polyethylene has very poor dielectric and ageing properties.

Yes
No
none
none

5. Rubber is most commonly used insulation in cables.

Yes
No
none
none

6. Rubber is most commonly used insulation in cables.

Yes
No
none
none

7. Natural rubber is obtained from milky sap of tropical trees.

Yes
No
none
none

8. Natural rubber is obtained from milky sap of tropical trees.

Yes
No
none
none

9. In congested areas where excavation is expensive and inconvenient 'draw in system'of laying of underground cables is often adopted.

Yes
No
none
none

10. In congested areas where excavation is expensive and inconvenient 'draw in system'of laying of underground cables is often adopted.

Yes
No
none
none

11. In capacitance grading a homogeneous dielectric is used.

Yes
No
none
none

12. In capacitance grading a homogeneous dielectric is used.

Yes
No
none
none

13. The advantage of oil filled cables is

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

14. The advantage of oil filled cables is

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

15. The insulating material should have

low permittivity
high resistivity
high dielectric strength
all of the above

16. The insulating material should have

low permittivity
high resistivity
high dielectric strength
all of the above

17. Copper as conductor for cables is used as

annealed
hardened and tempered
hard drawn
alloy with chromium

18. If a power cable and a communication cable are to run parallel the minimum distancebetween the two, to avoid interference, should be

2 cm
10 cm
50 cm
400 cm

19. 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

20. Cables for 220 kV lines are invariably

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

21. The thickness of metallic shielding on cables is usually

0.04 mm
0.2 to 0.4 mm
3 to 5 mm
40 to 60 mm

22. Underground cables are laid at sufficient depth

to minimise temperature stresses
to avoid being unearthed easily due to removal of soil
to minimise the effect of shocks and vibrations due to gassing vehicles, et
for all of the above reasons

23. 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

24. In a cable the voltage stress is maximum at

sheath
insulator
surface of the conductor
core of the conductor

25. In a cable the voltage stress is maximum at

sheath
insulator
surface of the conductor
core of the conductor

26. 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

27. The insulation of the cable decreases with

the increase in length of the insulation
the decrease in the length of the insulation
either (a) or (b)
none of the above

28. The breakdown of insulation of the cable can be avoided economically by the use of

inter-sheaths
insulating materials with different dielectric constants
both (a) and (b)
none of the above

29. The electrostatic stress in underground cables is

same at the conductor and the sheath
minimum at the conductor and maximum at the sheath
maximum at the conductor and minimum at the sheath
zero at the conductor as well as on the sheath

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

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

31. The current carrying capacity of cables in D.C. is more thanthat in A.C. mainly due to

absence of harmonics
non-existence of any stability limit
smaller dielectric loss
absence of ripples

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

blue
black
brown
none of the above

33. Cables are used for 132 kV lines.

High tension
Super tension
Extra high tension
Extra super voltage

34. Conduit pipes are normally used to protect _____ cables.

unsheathed cables
armoured
PVC sheathed cables
all of the above

35. The minimum dielectric stress in a cable is at

armour
bedding
conductor surface
lead sheath

36. In single core cables armouring is not done to

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

37. Dielectric strength of rubber is around

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

38. Low tension cables are generally used upto

200 V
500 V
700 V
1000 V

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

insulation layer
sheath
armour
conductor surface

40. High tension cables are generally used upto

11kV
33kV
66 kV
132 kV

41. High tension cables are generally used upto

11kV
33kV
66 kV
132 kV

42. The surge resistance of cable is

5 ohms
20 ohms
50 ohms
100 ohms

43. The surge resistance of cable is

5 ohms
20 ohms
50 ohms
100 ohms

44. In the cables, sheaths are used to

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

45. 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

46. If a cable of homogeneous insulation has a maximum stress of 10 kV/mm, then thedielectric strength of insulation should be

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

47. In the cables, sheaths are used to

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

48. In cables the charging current

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

49. The intersheaths in the cables are used to

minimize the stress
avoid the requirement of good insulation
provide proper stress distribution
none of the above

50. The intersheaths in the cables are used to

minimize the stress
avoid the requirement of good insulation
provide proper stress distribution
none of the above

Enjoyed the Quiz. Share this with friends

Comments

Add Your Review

Your email address will not be published.

Ask a Question

Book Now & Get 50% Discount

Date of Expires 05/08/2019

How to use? Just show us this coupon on a screen

Coupon Code

DL76T

Quick Contact to Help?

For any Query regarding a website or any issue please contact with us we are here for solving your problem 24/7

Contact Us Now

Related MCQ's

Subscribe to Newsletter!

Subscribe to get latest updates and information.