Domestic Wiring System

Q.

If an electric switch is off, then:

1. Less current flows through the circuit

2. No current flows through the circuit

3. More current flows through the circuit

4. Either A or B

Q. In household electrical circuits, a DC(direct current) supply is used.

1. True
2. False

Q. The colour of insulation over the 'live' wire is always .

1. green
2. yellow
3. red
4. black

Q.

In coaxial cable the material used as space is

1. teflon (or) polyethylene

2. glass or mica

3. a gaseous medium

4. glass

5. mica

Q.

If an electric switch is off then ___ .

1. Either A or B

2. No current flows through the circuit

3. More current flows through the circuit

4. Less current flows through the circuit

Q.

If an electric switch is off then:

1. More current flows through the circuit

2. Less current flows through the circuit

3. Either A or B

4. No current flows through the circuit

Q.

Earthing is provided for electrical appliances in a building to protect it from ______.

1. leakage of electric current

2. inducing excess current
3. heavy rainfall

4. earthquakes

Q. Why is the Earth called as "the ocean of charges"?

1. It can absorb a stream of negative charges only.
2. It can absorb a stream of both positive as well as negative charges.
3. It cannot absorb a stream of either positive or negative charges.
4. It can absorb a stream of positive charges only.

Q. All household components should be connected to ____ for safety.

1. electric poles
2. rubber
3. earth wire
4. antennas

Q. Which of the following does a domestic wiring system consists.

1. Electric meter and a main switch
2. Main switch
3. Lighting circuit
4. Power circuit

Q. Which of the following is a device used for protection from electrical faults in domestic electric circuits?

1. Iron rod
2. Copper wire
3. Electric Bulb
4. MCB

Q. What precaution will you do to transfer an equipment which is very sensitive to electric field from one point to another?

Q.

Fill in the blank.

If a person comes in contact with a ______ wire, he gets an electric shock.