LV03 mock exam

What electrical units is the meter in the picture set to read?

• Volts

• Amps

• Ohms

• Watts

If a customer complains of the need to frequently replace bulbs and the lights are very bright, the likely fault is:

• a wiring short circuit

• a defective switch

• a faulty battery

• a defective voltage regulator

If you were to connect the leads of an ammeter directly to the positive and negative terminals of a battery:

• you can judge the battery condition

• it would seriously damage the meter

• it would read 12 volts

• it would read 12 Amps

The fuel gauge reads empty even when the fuel tank is full. You check voltage to the gauge and fail to get a reading, is the fault more likely to be?

• The tank sender unit

• The voltage stabiliser

• The gauge

• Empty tank

In a lead acid battery, water and sulphuric acid is mixed together to make:

• Electrolyte

• The Casing

• The Negative plate

• The Positive plate

The diagram shows part of a lighting circuit. If the side and rear lamps and main beam lamps operate, but the dip beam lamps fail to operate, the likely cause is:

• the main feed from the battery is faulty

• the dip switch is faulty

• the battery is faulty

• the battery earth is faulty

When disconnecting a battery , the first terminal to be disconnected must always be:

• the positive terminal

• the negative terminal

• the one coloured red

• the earth terminal

A means of providing low current switching for a high current a starter motor circuit is by the use of:

• a flick switch

• a solenoid

• a hall generator

• a relay

An electrical cable is designated as 28/0.30. This mean that:

• it has 28 strands, each with a diameter of 0.30mm

• it has a maximum current rating of 28 amps

• it has 28 strands, each capable of carrying 0.30 amps

• it has 28 strands and a total diameter of 0.30 mm

If each of lamps R1, R2 and R3 are of equal resistance and the battery rated at 12 Volt, the voltage measures across each bulb will be:

• 12 Volts

• 4 Volts

• 6 Volts

• 2 Volts