Electrical principles for plumbers

Where is an MCB fitted? Select one of the following:

• Consumer unit

• Incoming electrical supply

• Before the electric meter

• After the electric meter

When carrying out a continuity test would you expect

• A very high reading

• A very low reading

• No reading at all

• a. A variable reading

Test probes on a multimeter must have a maximum exposed tip of

• 6mm

• 5mm

• 4mm

• 10mm

1. The design, installation and testing of electrical systems is covered by:

• BS6700

• BS1212

• BS7671

• BS7176

What does AC stand for

• Alternative current

• Accelerated current

• Actual current

• Alternating current

What does DC stand for

• Domestic Current

• Direct Current

• Dead Current

• Down Current

DC is direct current it is electrical energy generated by batteries (chemically) it is dissimilar metals in a dilute acid solution- what is correct about the Cathode and Anode

• •Cathode is eaten away away by the anode

• •Cathode eats away at the anode

What size cable and fuse should be used on a domestic lighting circuit

• 30amps and 1.5mm twin and earth

• 6 amps & 1.5mm twin and earth

• 6 amps & 2.5mm twin and earth

• 16 amps & 1.5mm twin and earth

A domestic ring socket main should have what size cable and fuse protection

• 2.5mm twin and earth

  16 amp circuit protection

• 2.5mm twin and earth

  6 amp circuit protection

• 1.5mm twin and earth

  30 amp circuit protection

• 2.5mm twin and earth

  32 amp circuit protection

What is the correct name for this piece of electrical equipment

• Fuse box

• Consumer unit

• Switched fuse spur

• Lock out unit