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WorksheetsIMI REVISION LEVEL2
Total questions: 64
Worksheet time: 21mins
What does the diagram illustrate about a 'Single point' system?
It shows the point of air intake only.
It illustrates the connection between fuel, air, and the engine control unit (ECU) in a system.
It depicts a cooling system for electronic components.
It represents a hydraulic system.
What does SPI stand for in the context of fuel injection systems?
Single Point Injection
Systematic Point Interface
Single Pressure Injection
Systematic Pressure Increase
What is the fuel supply pressure for a Single Point Injection system?
2 bar
1 bar
0.5 bar
1.5 bar
What is the primary function of an ECU (Electronic Control Unit) in automotive systems?
To play music through the car's audio system
To control the vehicle's electronic systems by processing input signals and sending output signals
To monitor the car's fuel levels only
To enhance the vehicle's external appearance
The definition of the term 'castor angle' is defined as
inclination of the road wheel relative to the vertical axis, when viewed from the side of the vehicle
angle of the road wheel steering axis relative to the vertical, as viewed from above the vehicle
angle of the road wheel steering axis relative to the vertical, as viewed from the side of the vehicle
inclination of the road wheel relative to the vertical axis, when viewed from the front of the vehicle
During traction control operation
the brake is rapidly applied and released on the spinning wheel until traction is regained
the brake is applied on the non spinning wheel until traction is regained
the brake is applied on the spinning wheel until traction is regained
the brake is rapidly applied and released on the non spinning wheel until traction is regained
When cornering, a vehicle with electronically controlled air suspension will,
immediately provide more air pressure to the air springs on the outside of the bend
provide more air pressure to the air springs on the outside of the bend after a short delay
immediately provide more air pressure to the air springs on the inside of the bend
provide more air pressure to the air springs on the inside of the bend after a short delay
One advantage of a vehicle fitted with EPAS over a vehicle fitted with hydraulic power steering is
less steering effort
no torque sensing required
reduced steering rack ratio
improved fuel economy
During hard braking, an insecure load in the boot will slide forward due to
Normal force
gravitational force
inertia force
centrifugal force
On a hybrid vehicle, which one of the following is responsible for the amount of regenerative braking required?
The main brake pedal switch
The ABS modulator valves
Master cylinder pressure sensor
All four wheel speed sensors
What does a central door locking actuator contain?
Solenoid and rocker switch
Drive motor and gear
Motor and solenoid
Solenoid and gear
What is the name of the electrical principle, that is used to stop the wiper system against momentum, once the wipers has been switched off?
Regenerative braking
Electromotive force
Electromagnetic induction
Reactive braking
The device shown is more commonly know as
a logic gate
a transistor
a solenoid switch
an intergrated circuit (IC)
How is the compressor clutch engaged on an air conditioning system?
Using a solenoid
Using Permanet magnets
Electromagnetically
Mechanically using gears
What should the resistance reading of a door contact switch be, when the door is closed?
Infinity
0 Ohms
100 Ohms
10K ohms
What are the main advantages of using LED lighting
They produce a bright blue light from 1 LED
Quick reaction and greater reliability
Quick reaction and greater reliability
Slow reaction time increasing life expectancy
On a typical vehicle heater system, a customer complains of loss of slowspeeds of the motor. What would be the most likely fault?
Resistor pack failure
Coolant sensor faulty
Switch faulty unit
Motor brush failure
When checking an electric window or mirror, what should be checked first?
Fuse
Switch
wiring
Motor
In relation to cooling and air conditioning, what is meant by the term convection?
Transfer of heat using waves or particles
The difference in air pressure
Transfer of heat which involves a fluid
Flow of heat through a material
On a SRS system with an Airbag and Seatbelt Pre-tensioner, what will be occurring from 10-15 milliseconds after impact?
Driver hits the bag and the pre-tensioner releases
Impact identified and pre-tensioner ignition
Airbag is inflated and the pre-tensioning is complete
Airbag starts to inflate and pre-tensioner moving
What would the symptom be, if the system earth failed on an electric window circuit?
Window would opeerate slowly
Window would not operate
Window would only do down
Window would only go up
What does PWM stand for?
pulse width modulation
primary wired modules
Pulse weighted motors
Pulse wired motors
How many motors are used in a typical single electric mirror adjusting system?
1
2
3
0
which one of the following terms applies to the reflector part of a headlight?
Prism
lense
Parabolic
condenser
What are the symptoms likely to be the next time the engine is started if the alternator charge warning lamp has blown?
The alternator will overcharge
The alternator will only charge at idle
The alternator will only charge at high revs
The alternator will not charge
The pattern shown on an oscilloscope of an hall effect type sensor would be a
Square wave
cosine wave
saw tooth
Sine Wave
How does an ABS system with an inductive wheel speed sensors know that a wheel is slowing down?
an decreasing D.C. voltage
an increasing D.C. voltage
an decreasing A.C. voltage
an increasing A.C. voltage
the diagram represents a wave form from an inductive speed sensor. What will happen to the sine wave as the component rotates faster?
Voltage remains the same and the frequency increases
Voltage increases and the frequency increases
Voltage increases and the frequency remains the same
voltage remains the same and the frequency remains the same
What is an electronic device that lets electronic current flow only 1 way
zener diode
capacitor
Transistor
Rectifier
Your Satellite Navigation system is struggling to locate your position. the most likely cause is
a faulty yaw angle sensor
a faulty wheel speed sensor
only 2 satellites are in view of the receiver
only 3 satellites are in view of the receiver
What will be the effect of a lamp with a poor earth connection?
Lamp will be dim
Circuit fuse will blow
the bulb will blow
lamp will be brighter
An ohms test on a Thermister indicates 0C=4500 ohms 100C 200 ohms this type of thermister is
negative temperature coefficient
positive temperature coefficient
exponential temperature coefficient
reverse temperature coefficient
The pattern shown on an oscilloscope of an inductive type sensor would be a
square wave
cosine wave
saw tooth
sine wave
The function of the low pressure switch in an air conditioning system is to
regulate refrigerant flow when the system is switched on
increase air flow through the condenser when required
disconnect the compressor due to low gas/liquid level
reduce evaporator temperature when required
What is a multiplex network?
a data bus system carrying signals to and from remote control units
more wiring than conventional automotive wiring systems
a data bus system carrying battery voltage to and from remote control units
a data bus system carrying AC signals to and from remote control units
What readings would be expected when checking the feed to the terminals on a front heated screen?
Within 0.5v of the battery voltage
Within 1.75V of the battery voltage
Within 2.5v of the battery voltage
Within 4.6v of the battery voltage
What is the correct procedure to check for a parasitic drain
Ignition off, disconnect both battery leads and connect an ammeter in parallel
Ignition off, disconnect the battery earth and connect an ammeter in series
Ignition off, disconnect the battery positive and connect a voltmeter on series
Ignition on, disconnect both battery positive and connect an ohmmeter in series
A diesel glow plug is suspected to be faulty. The test to be carried out would be
an amperage check with an ohmmeter
a switching check with an oscilloscope
a voltage check with an ohmmeter
a resistance test with an ohmmeter
What on a car uses a sun load sensor?
Climate control system
Central door locking
A car alarm
An electric window
A gas discharge bulb contains what
electrodes, argon, silver and metal salts
electrodes, xenon, mercury and metal salts
wire elements, helium gas and metal salts
a tungsten electrode, silver and metal salts
What does Flemings left hand rule relate too?
Flemings right hand rule is used with motors
Flemings left hand rule is used with generators
Flemings left hand rule is used with motors
Flemings left hand rule is used with ohms law
On a hybrid electric vehicle, regenerative braking is when the
generator acts as a motor
brake fluid recuperates
parking brake is slowly applied
motor acts as a generator
Which of the following statements is correct?
1 Hertz = 1 cycle per second
Hertz is the unit of magnetic flux
The unit of power is the Hertz
1 Hertz = 360 degrees rotation
When checking for parasitic drain, the voltmeter is connected in parrallel with the battery and all consumers are switch on
True
False
A strain gauge pressure sensor incorporates the use of
magnetic induction
a thermister
sensing resistors
piezo crystals
Which of the following is NOT true about LEDs?
LEDs have a shorter operating life than conventional bulbs
LEDs can produce a brighter light than conventional bulbs
LEDs can operate quicker than conventional bulbs
LEDs are vibration resistant
What is the operating temperature of an incandescent bulb?
2000 degrees celcius
2300 degrees celcius
1500 degrees celcius
3000 degrees celcius
What does DRL stand for?
Daylight running lamps
Daytime running lights
Digital resonance lighting
Digital running lighting
When discussing engine temperature sensors, what does NTC stand for?
Negative temperature coolant
Negative temperature coefficient
Numbered temperature coolant
Numbered temperature current
What sensor is used for automatic headlight systems?
Thermistor
Photo cell
Inductive
Hall effect
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
Directional indicators should flash at which rate?
40 to 100 flashes per minute
60 to 120 flashes per minute
95 to 125 flashes per minute
90 to 140 flashes per minute
How many wires are normally connected to a twin filament light bulb?
1
2
3
4
Identify the circuit the item shown belongs to.
The indicator circuit
The headlamp circuit
The spot light circuit
The reverse lamp circuit
What does PWM stand for?
Pressure width modulation
Pulse width modulation
Pulse wave modulation
Pressure wave modulation
Where is the reverse light switch normally mounted?
Instrument panel
Transmission
Brake pedal arm
None of the above
How many brushes does a two-speed wiper motor have?
1
2
3
4
Where is the stoplight switch normally mounted?
Instrument panel
Transmission
Brake pedal arm
None of the above
A gas discharge bulb contains what?
A tungsten electrode, silver and metal salts
Wire elements, helium gas and metal salts
Electrodes, argon, silver and metal salts
Electrodes, xenon, mercury and metal salts
What is the reflective part of a headlamp called?
A prism
A parabolic
A lens
A condenser
What is the part below used for?
Stop light operation
Airbag control
Interior lamp circuits
Side light operation
Which of the following components is essential for the operation of a piezoelectric sensor?
Capacitor
Resistor
Piezoelectric crystal
Inductor
What is the primary function of a thermistor in an electronic circuit?
To store electrical energy
To measure temperature
To amplify signals
To convert AC to DC
Which type of sensor is commonly used to detect the rotational speed of a wheel?
Thermistor
Inductive sensor
Capacitive sensor
Photoelectric sensor
