WorksheetsAutomotive Electrical Systems Quiz
Total questions: 15
Worksheet time: 8mins
When diagnosing a fault with an inductive type ABS sensor, the Technician should first disconnect the sensor and then test it with
A test light.
An ammeter.
An ohmmeter.
A fused jumper wire.
When looking at a waveform on an oscilloscope, what does the vertical line represent?
a. Volts
b. Amps
c. Time
d. Ohms
Which component converts AC to DC in an alternator?
a. A relay
b. A rectifier
c. A coil pack
d. A voltage regulator
Why does a roof aerial have a live feed wire connected to it?
a. To raise and lower the aerial
b. To operate an aerial amplifier
c. To switch the aerial on and off
d. To create a weaker aerial signal
What should a Technician check when diagnosing a faulty alternator?
a. The battery reserve capacity
b. The charge rate at the battery
c. The starter motor current draw
d. The alternator internal resistance
What would be the simplest way to diagnose a faulty horn switch?
a. Check the operation with an oscilloscope
b. Remove the dashboard and trace the wiring
c. Carry out an actuator test with a code reader
d. Run a wire from another car and press the horn on that car
Why must a hybrid vehicle incorporate a DC-to-DC convertor?
a. To maintain a constant voltage
b. To enable regeneration to take place
c. To reduce high voltage to low voltage
d. To allow the alternator to charge the high voltage battery
What is the power consumed by a vehicle’s horn, when the voltage supplied is 12 Volts and the current flow is 3 Amps?
a. 0.75 Watts
b. 4 Watts
c. 15 Watts
d. 36 Watts
Which of the following DIN numbers would indicate an ignition live on a wiring diagram?
a. 10
b. 15
c. 30
d. 31
What is the system called that emits a warning when the vehicle crosses the white line on the road without using indicators?
a. Blind spot alert
b. Lane departure
c. Lane change assist
d. Collision avoidance
In what state is air conditioning refrigerant when it leaves the compressor?
a. High pressure, high temperature gas
b. Low pressure, High temperature gas
c. Low pressure, low temperature liquid
d. High pressure, high temperature liquid
What does a GPS rely on for accuracy?
a. An accurate atomic clock
b. Sensors in the road surface
c. ECU updates from a satellite
d. Satellite navigational programme
What test equipment can be used to check the correct operation of the CAN bus system on a modern vehicle?
a. Ammeter
b. Oscilloscope
c. Digital voltmeter
d. An analogue voltmeter
What can activate an airbag if a vehicles battery is damaged during an accident?
a. A diode
b. A resistor
c. A transistor
d. A capacitor
When replacing an air-conditioning pipe, why is it important to blank off connections?
a. To stop the expansion valve from overheating
b. So that oil cannot escape from the condenser
c. To stop dirt and moisture entering the system
d. So that gas cannot escape from the evaporator
