1. Burden of current transformer is usually expressed in-

Volts

Amperes

Volt amperes

Kilowatt

2. Bucholz relay used on-

Air cooled transformer.

Oil cooled transformers.

Welding transformers

Furnace transformer.

3. The type of oil which is suitable as transformer oil is-

Animal oil

Cooking oil

Mineral oil

Vegetable oil

4. A short circuit test on transformer oil is-

Copper loss at full load

Copper loss at half load

Iron loss at any load

Sum of iron losses and copper losses

5. A radio station broadcast at 30m wavelength.The frequency of broadcast wiil be-

30Hz

300Hz

10MHz

10KHz

6. . Satellite power requirement is provided through –

Lead-acid batteries

Dry cell

Solar cells

Nickel cadmium cell

7. One Horse power is equal to –

5.50 foot pound/ second

55.00 foot pound/ second

550 foot pound/second

5550 foot pound/second

8. For an R-L load-

Active Power is better than apparent power

Reactive Power is better than apparent power

Apparent power is better than both active and reactive power

All the equal

9. Which is the highest system voltage in Bangladesh ?

33KV ACr

132KV AC

230 KV AC

230 KV HV DC link

10. Which one of the following semi-conductor ?

Copper

Silicon

Neon

Lithium