IMI Level 3 AE06 Electrical Principles - Light Vehicle Maintenance - 2 of 3

ohm meter test on a thermistor shows 0 degrees C = 4,500 ohms ,20 degrees C= 1,200 ohms ,100 degreesC=200 ohms

• a/ Negative Temperature Coefficient
• b/ An inductive pick up is being used
• c/ A piezo crystal pressure sensor is being used
• d/ Positive Temperature Coefficient

Whilst testing the voltage on an inductive speed sensor what would happen if the rotating component slowed.

• a/ there would be a decrease in AC Voltage
• b/ there would be an increase in AC Voltage
• c/ there would be a decrease in DC Voltage
• d/ there would be an increase in DC Voltage.

What will be the effect on a lamp with a poor earth connection.

• the lamp will glow brighter than normal
• the lamp will be dimmer than normal
• the bulb would blow
• the fuse would blow

What should the resistance of a door contact switch be when the door is closed.

• 0 ohms
• 10 K/Ohms
• Infinity
• 100 Ohms

Which of the following statements is correct

• Flemming`s left hand rule is used with Ohms Law
• Flemming`s left hand rule is used with motors
• Flemming`s right hand rule is used with motors
• Flemmimg`s left hand rule is used with generators

A diesel glow plug is suspected to be faulty the test to carry out would be to test for

• Volts with an Ohm Meter
• Amps with an Ohm Meter
• / A switching check with an oscilloscope
• Resistance test with an ohm meter.

An AC inductive pick up will produce which type of wave form.

• A PMW
• A PWM
• A square wave pattern for voltage and time.
• A sine wave

A Strain gauge pressure sensor incorporates the use of

• sensing resistors
• Thermister
• magnetic induction
• piezo crystals

Name the electrical principle used to stop the wiper motor against momentum once the wipers have been switched off.

• Electromagnetic induction
• Reactive braking
• Re-generative braking
• EMF

Which one of the following terms applies to a reflector in a vehicle headlight.

• Sine wave reaction
• lamp colour
• Parabolic
• PWM