What is Extra High Voltage?
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Description : What is meant by extra high voltage transmission?

Answer : HT & LT  two types transmission in industrial line 

Description : What is the definition of extra low voltage?

Answer : Extra-low voltage (ELV) is an electricity supply voltage in a range which carries a low risk of dangerous electrical shock.

Description : In a tap changing transformer, the tappings are provided on (a) primary winding (b) secondary winding (c) high voltage winding (d) any of the above

Answer : (b) secondary winding

Description : The power transmitted will be maximum when (a) corona losses are minimum (b) reactance is high (c) sending end voltage is more (d) receiving end voltage is more

Answer : (c) sending end voltage is more

Description : The material generally used for armour of high voltage cables is (a) aluminium (b) steel (c) brass (d) copper

Answer : (b) steel