1. Three equal resistors of hundred ohm is connected in series across a source of E.m.f 30V.What would be the power consumed by is resistor?

10 W

30 W

90 W

60 W

2. The unit of resistivity is

Ohms

Ohm-m

Ohm/sqm

None

3. The phenomena of creeping occurs in

Ammeter

Voltmeter

Wattmeter

Watt-hour meter

4. Common declared distribution voltage in Bangladesh for low voltage circuit is –

230 Volt

440 Volt

250 Volt

350 Volt

5. Which distribution system is more reliable?

Ring main system

Tree system

Radial system

All are equally reliable.

6. Burden of current transformer is usually expressed in-

Volts

Amperes

Volt amperes

Kilowatt

7. Bucholz relay used on-

Air cooled transformer.

Oil cooled transformers.

Welding transformers

Furnace transformer.

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

Animal oil

Cooking oil

Mineral oil

Vegetable oil

9. 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

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

30Hz

300Hz

10MHz

10KHz