transmission of electrical energy

8/16/2019 Transmission of Electrical Energy

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Transmission of Electrical Energy

dristyBD EEE MCQ

Voltage and Current are not the same thing, although they are very closely related. In simple

terms, Voltage causes Current. Given a Voltage and a path for the electrons, current willflow. Given the path, but no Voltage, or Voltage without the path, there will be no Current.

Test Your Knowledge About Transmission of Electrical

Energy

1. The sag produced in conductor of a transmission line...

Weight of the conductor of a transmission line

Tension of conductor

Length of the conductor

All of Above

2. Capacitance of a transmission line is the result of....

potential difference between the conductors

charge per unit

current flow between the conductor

none of above

3. Corona occures between two transmission lines when they ....

have high voltage

are widely spaced

are closely spaced

none of above

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4. Which phenomena is Ferranti effect?

When sending and receiving end voltage is equal

When receiving end voltage greater than sending end voltage

When sending end voltage greater than receiving end voltage

None of above

5. High voltage transmission lines use...

pin insulator

suspension insulator

both a & b optionnone of above

6. Transmission lines insulator are made of...

p.v.c

porcelain

glass

none of above

7. In transmission lines cross arm are made of...

steel

wood

R.C.C

All of above

8. Overhead lines generally used

Copper Conductor

A.C.S.R conductor

Silver Conductor

none of above


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9. As load power factor of an alternator becomes more leading , the value of generated

voltage required to give rated terminal voltage--

unchanged

increase

decrease

none of above

10. The presence of ozone due to corona is harmful because it....

transfer energy to ground

corroded material

reduce power factor

none of above

11. A feeder, in a transmission system feeds power to...

ground

generating station

service main

distributor

12. Pin type insulator not used in transmission lines for voltage beyond....

11KV

33KV

1KV

none of above

13. Which of the following factors skin effect depends?

Frequency of the current

size of the conductor

resistivity of the material

all of above


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14. A A.C.S.R conductor having 7 steel stands surrounded by 25 aluminium conductor will

be specified as

7/25

50/15

14/50

25/7

15.320km line considered as.

Medium transmission line

long transmission line

short transmission line

none of above

16. 65km line considered as.

Medium transmission line

short transmission line

long transmission line

none of above

17. Whice expression is right?

none of above

18. In short transmission lines, the effects of .............. are neglected.

inductance

resistance

capacitance

all of above


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19. The length of a short transmission line is upto about...

150km

50km

100km

120km

20. The capacitance of a transmission line is ........... element

shunt

series

both A and B None of above

Ans:-

1. D 2. A 3. C 4. B 5. B 6. B

7. A 8. B 9. C 10. B 11. D 12. B 13. D 14. D 15. B 16. A 17. B 18. C 19. B 20. A

transmission of electrical energy

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