Quiz on Domestic Electrical Appliances
Feb 23, 2016
Quiz on Domestic Electrical Appliances
1. A resistance coil is also called
a heating coil.
a fuse.
an earth wire.
a live wire.
2. Which of the following is NOT making use of heating effect of electric current to operate?
Electric heater
Hairdryer
Electric radiator
Electric doorbell
3. What is the function of the insulation layer inside the heating element of an electric kettle?
Prevent heat leakage
Separate the heating wire from the metallic tube and prevent electrical leakage.
Speed up boiling of water
Avoid overloading
4. Which of the following appliance has the heating element hidden and is separated from the other metallic
part of the body? hairdryer
Electric cooker
Electric heater
Electric fan
5. A device that generate a magnetic effect after being connected to the power supply is known as
A solenoid
An electric breaker
An electromagnet
A doorbell
6. Which of the following is NOT making use of magnetic effect of electric current to operate?
Electric doorbell
Handset
Washing machine
Oven
7. Which of the followings are the necessary components for making an electromagnet?
(i) Electricity supply(ii) Long piece of Insulated wire (iii) Iron core(iv) Fuse
Only (i) and (ii)
Only (i) and (iii)
Only (i)、 (ii) and (iii)
(i)、 (ii) 、 (iii) and (iv)
8. Which of the following appliances DO NOT use a motor to operate?
Blender
Electric iron
Electric fan
Air conditioner
9. Which of the following is correct?
10. The unit of power is
volt
ampere
watts
ohm
11. Which of the following is correct?
11. Which of the following is correct?
Current
Current
Current
Current
12. Which of the following is correct?
Power X Time = Energy
Power X Current = Energy
Power X Time = Voltage
Power X Voltage = Current
13. What does a kilowatt-hour meter measure?
current
energy
power
voltage