Actuator and Electrical Systems Quiz

What type of actuator is used on a remotely switched fuel flap release?

• A motor and gear actuator

• A pneumatic motor

• A stepper motor

• An electric solenoid

What device is used to control the duration of the heater systems operation?

• A regulator and a relay

• A relay and timer

• A thermistor and relay

• A relay and resistor

What electrical unit is used to control the power flow in the circuit?

• A regulator

• A diode

• A relay

• A thyristor

When testing a suspected faulty door actuator, what would you expect to find on the two activation wires when the central locking is active?

• Both showing an earth

• Both reading 12 volt

• 12 volts and an earth

• 0 Ohms

In modern, heavy commercial vehicles what is the most common use for LED lighting?

• Side marker lights

• Headlight low beam

• Front driving lights

• Front fog lights

What is the purpose of a power capacitor in a higher power amplifier system?

• To act as a second power source for the amplifiers if the vehicle battery fails

• To keep the amp supply to the amplifiers at a pre-set level in all conditions

• To prevent damage to electronic amplifier control systems in a power failure situation

• To provide a constant voltage to the amplifiers under all conditions

What causes an element to get hot?

• The magnetic field that forms around the element when current flows

• The elements resistance to the flow of electrical current

• The higher voltage produced by the alternator when the screen heater is operated

• The glasses resistance to the flow of electrical current

The door lock actuators are wired in:

• parallel

• series then parallel

• parallel then series

• series

What is the name of the component in an alternator that converts AC to DC?

• Regulator

• Stator

• Rectifier

• One way clutch

Before carrying out any repairs on an airbag system, what must you do?

• Disconnect the battery and start work straight away

• Leave the battery connected and remove the ignition keys for 15 minutes

• Disconnect the battery and wait for at least 15 minute

• Disconnect the battery and wait for at least 5 minutes