Mock exam 33 questions electrical science

Which one of the following does NOT conduct electricity?

• Brass

• Glass

• Aluminium

• Copper

Which of the following makes use of the magnetic effect of an electric current?

•  Bimetal strip

• Electric Doorbell

• Car battery

• Storage heater

The meter used in an electrical installation for recording the energy used is called?

• a power meter

• A Wattmeter

• an ammeter

• a kilowatt hour meter

What is the Quantity symbol for Impedance?

• Z

• A

• I

• V

What value of resistance is required to have a current of 12A, from a supply of 230v?

• 1320A

• 19.17Ω

• 19.17A

• 1320Ω

A series circuit consists of three resistors with values of 100Ω, 250Ω and 350Ω. The total resistance is?

• 70Ω

•  59Ω

•  550Ω

• 700Ω

The magnetic effect of an electric current is put to use in a?

• Solenoid

• Heating clement

•  Fuse

• Battery

 

If a lever has a fulcrum is at one end and the load is in the middle but nearer to the fulcrum it is known as a?

• Class 2 Lever

•  Class 1 Lever

• Class 3 Lever

• Universal Lever

An Electric storage heater uses the heating method of?

• Immersion

• Radiation

• Convection

• conduction

If a lever has a fulcrum in the middle between the force and load it is known as a?

•  Universal Lever

•  Class 1 Lever

•  Class 2 Lever

•  Class 3 Lever