Vehicle Electrics progress check

When replacing a vehicle Battery

• Insulated tools must be used

• The ignition must be switched on

• The live terminal must be removed first and refitted last

• The earth terminal must be removed first and refitted last

After discharging a lead acid battery, the plate material consists of

• Lead Sulphate

• Lead Peroxide

• Spongy Lead

• Lead Calcium

Noisy engagement of a starter motor can be caused by

• Worn brushes

• A worn drive end brush

• A short circuit field winding

• Open circuit solenoid pull in winding

Starter motors have the field windings and armature connected in series as this produces the

• Maximum torque at zero speed

• Maximum torque at maximum speed

• Minimum torque at zero speed

• Minimum torque at minimum speed

When the starter switch is operated the voltmeter connected across the battery terminal shows no alteration in the reading. This indicates

• An open circuit in the starter circuit

• The starter circuit is operating correctly

• A short circuit in the starter circuit

• The starter motor engagement gear is jammed

Which one of the following faults would cause the starter motor to draw an excessive amount of current during cranking?

• High resistance on the starter motor brushes

• Engine earth strap removed from the vehicle

• Starter motor field windings open circuit

• Short to earth inside the armature

The largest diameter electrical cable used on a vehicle connects the starter motor to the

• Distributor cap

• Ignition coil

• Engine

• Battery

The function of the rectifier in the charging system is to

• Convert alternating current to direct current

• Control the output voltage

• Produce the rotor magnetic field

• Allow current to pass to the spinning rotor

When a vehicle is being driven, the main source of electrical power is the

• Alternator

• Regulator

• Battery

• Solenoid

The alternator component which consists of 6 or 9 diodes connected to a heat sink is the

• Stator

• Regulator

• Rotor

• Rectifier