MCQs Electrical Engineering
1. By using bundle conductors, the critical voltage for the formation of corona will be :
(1) Remain same
(2) Increase
(3) Decrease
(4) Not occur
Ans (2)
2. The current in a transmission line under no load conditions is due to .
(1) spinning reserve
(2 ) corona effects
(3) capacitance of the line
(4) back flow earth
Ans (3)
3. On 132 kV transmission lines, some particular type of insulator is used . What is the name given to it ?
(1) Pin type insulators
(2) Disc type insulators
(3) Shackle type insulators
(4) Pin and shackle type insulators
Ans (2)
4.Which of the following insulator will be selected for high voltage applications ?
(1) Strain
(2) Suspension
(3) Pin
(4) Egg
Ans (2)
5. Corona loss is less when the shape of conductor is :
(1) Circular
(2) Flat
(3) Oval
(4) Independent of shape
Ans (1)
6. A wire placed on the top of a transmission line acts as
(1) a phase wire
(2) neutral
(3) a transmission wire
(4) ground wire
Ans (4)
7. The ratio of the puncture voltage to the flashover voltage of an insulator is -
(1) equal to one
(2)lower than one
(3) zero
(4) greater than one
Ans (4)
8. Which portion of the transmission system is more prone to faults ?
(1) Alternator
(2) Transformer
(3) Overhead lines
(4) Underground cables
Ans (3)
9. Aluminium conductor canles can be joined by
(1) Gas welding
(2) Soldering
(3) Compression
(4) Thermit welding
Ans (3)
10. Overhead lines for power supply to tramcars are at a nimimum height of
(1) 3 m
(2) 6m
(3) 10 m
(4) 20m
Ans (3)
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