Electrical Systems Review

What would be the most suitable test to carry out if a battery does not charge?

• Check all the lamps have the correct rating

• Check for corrosion on the starter motor Positive connection

• Carry out an Alternator Current Output Test

• Test the Specific Gravity of the electrolyte

When conducting an alternator current output test what is the most common meter reading?

• 36 Volts

• 36 Ohms

• 36 Watts

• 36 Amps

Why does the battery supply a small voltage even when all circuits are switched off?

• To maintain a small working temperature in the battery

• To ensure the glow plugs are warm for enhanced cold starting in winter

• To prevent component memory loss in the radio

• To maintain constant monitoring of the Tyre Pressure Monitoring System (TPMS)

Which component in an alternator converts AC Voltage into DC Voltage?

• The regulator

• The armature

• The commutator

• The rectifier

If the headlamps of a car are dim what would be your first check?

• Damage to the headlamp lens

• Poor earth connection

• Corroded headlamp reflector

• The supply voltage

What test would you perform if the starter motor turns over very slowly when starting the engine?

• A Current Flow test

• A Continuity test with an Ohms meter

• A Volt Drop test

• A Cylinder Compression test

How is a Voltmeter connected to carry out tests?

• In series

• In combination

• In parallel

• In isolation

How is an Ammeter connected to carry out tests?

• In series

• In combination

• In parallel

• In isolation

How is an Ohmmeter connected to carry out tests?

• In series

• In combination

• In parallel

• In isolation

When disconnecting a battery, which terminal is removed first?

• Positive

• Ground

• Neutral

• It does not matter