Electrical Practice Test -1

The separate circuit breakers for all types of different electrical equipment within a dwelling, are contained in the?

• Supplier’s sealed fuse unit

• Supplier’s meter

• Consumer unit

• Residual current device

Which one of the following appliances should have its own separate connection to the consumer unit?

• An immersion heater

• An electric fire

• A bathroom light

• A freestanding fan heater

The main equipotential bonding point to earth the hot and cold services, would usually be located?

• Near to the cold water storage cistern

• On the cold water supply pipe as it enters the property

• On the cold feed to the hot water storage cylinder

• Behind the panel under the bath

The normal voltage of the electric supply to a dwelling is?

• 110 V alternating current

• 240 V alternating current

• 240 V direct current

• 415 V three-phase supply

The rating of a miniature circuit breaker, in a consumer unit in a dwelling that is only feeding a gas central heating system, is usually sized at?

• 6 amps

• 12 amps

• 16 amps

• 20 amps

The miniature circuit breaker in a consumer unit for a ring main circuit in a dwelling is usually sized at?

• 6 amps

• 18 amps

• 20 amps

• 32 amps

Pipework that is not earthed by the main bonding conductor to the property, should be earthed by providing?

• Short circuits

• Bypass circuits

• Complimentary bonding

• Supplementary bonding

Which one of the following must be contacted if damage to the main supply cable to a dwelling is discovered during installation work?

• The fire authority

• The Local Authority

• The electricity supplier

• The main contractor

Which one of the following appliances in a dwelling usually requires a 2.5 mm² minimum heat proof flex?

• An electric shower

• An electric immersion heater

• A central heating pump

• A macerator type WC

When power to an appliance is turned off, power flow through both the phase (live) and neutral conductors can be prevented by the use of a?

• Double pole switch

• Single pole switch

• Fuse

• Ring circuit