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WorksheetsLV03 IMI Electrical Components and Measurements Quiz
Total questions: 63
Worksheet time: 32mins
The relative density of the electrolyte in a fully charged lead acid battery is approximately:
12.80
1.300
1.500
1.280
None of the above
In the component is known as a:
Diode
Capacitor
Fuse
Transistor
The unit of electrical power is the:
Voltage
BHP
Newton
Watt
A thermistor is a type of:
Electronic one way valve
Rectification diode
Suppression device
Temperature sensitive device
What type of starter is shown:
Inertia drive
Engaged drive
Direct drive
Pre-engaged drive
In a lead acid battery, distilled water and sulphuric acid are mixed together to make:
H2SO4
PBO4
2H2SO4
H2O4
What check would you carry out, if the door window motor does not work?
Replace the motor
Replace the operating switch
Check the fuse
Measure the operating current
When fitting a halogen head lamp bulb you should:
Test the bulb before fitting it
Clean the reflector
Avoid touching the glass envelope
Check the beam setting after fitting the bulb
The diagram shows part of a lighting circuit. What is the effect if the earth connection to the component labelled 'C' is broken?
The sides light will not operate
The dip beam will not operate
It will make no difference
Both dip and main will not operate but the headlamp flash will work
A permanent live feed is found at point A on the electrical diagram and this would cause:
The starter will operate as normal
The starter will not operate
The starter will operate erratically
The starter will permanently rotate
If each of lamps R1, R2, and R3 are of equal resistance and the battery rated at 12 volts, the voltage measures across each bulb will be:
36 volts
12 Amps
4 volts
12 volts each
The alternator stator is found in the:
Control circuit
The main power output
Connected to the rotor windings
Main casing
Before testing an unfamiliar electronic component for the first time, it is always good practice to:
Only fit OME
Fit good used parts
Consult the owners handbook
Consult the workshop manual
Which meter is connected in series with circuit components to get a reading?
Ohmmeter
Volt meter
Watt meter
Ammeter
In a 12 volt lighting circuit, 4 lamps are connected in parallel, each lamp is rated at 6 watts. The current used by this circuit is:
24 watts
4 Amps
2 Amps
12 Volts
An electronic immobiliser is likely to work by disabling:
Door locking system
The engine management system
The Lambda control circuit
None of the above
In the diagram, the component A is known as a:
Transistor
Thermistor
Resistor
SCR
The diagram shows two resistors in a circuit, the resistors are connected in:
Compound
Series – parallel
Parallel
Series
When disconnecting a battery, the first terminal to be disconnected must always be:
Positive
Negative
Earth
Neutral
An electrical cable is designated as 28/0.30. This means that:
The cable has 28 strands each of 0.30 mm diameter
The cable is 28 mm in diameter and 0.30 mm long
The cable can carry 28 amps at 0.30 volts
The cable is 28 meters long and 0.30 mm thick
The 'lambda sensor' is usually located in the:
Front pipe or down pipe
Rear exhaust pipe
Fuel tank
Air filter
Current flow in a circuit is measured using:
Hydrometer
Flow meter
Ohmmeter
Ammeter
If each of the lamps R1, R2, and R3 are of equal resistance and the battery rated at 12 volts, the voltage measured across each bulb will be:
2 Volts
4 Volts
6 Volts
12 Volts
If the side and rear lamps and main beam lamps operate, but the dip beam lamps fail to operate, the likely cause is:
Faulty main beam switch
Blown fuse in the dip beam circuit
Disconnected rear lamp
Burnt-out side lamp bulb
The statement 'vehicle lights must be maintained in working order' forms part of:
Construction and use regulations
MOT you decide
Vehicle safety guidelines
Traffic light rules
To stop the starter motor being turned by the engine when it starts, it is fitted with:
A clutch
A flywheel
A solenoid
A starter relay
A light is not working. The bulb is not faulty. The next check would be the:
Battery
Fuse
Wiring
Switch
A loose or dirty battery terminal is likely to cause:
Increased battery life
Improved engine performance
Starting problems
Faster charging
If you were to connect the leads of an ammeter directly to the positive and negative terminals of a battery:
It would measure the battery voltage
Damage the battery
Damage the meter
Give an Ohms reading
Name the components listed below:
Component 7
Component 23
Component 6
Component 9
Component 19
Name the components listed below:
Component 4 = Pinion and UDC
Component 45 = Armature
Component 46 = Solenoid
Component 41 = Brush
An electronics device that senses temperature change is a:
Thermistor
Thermostat
Diode
Thyristor
The dash gauges rise with engine speed, this could be caused by:
Faulty gauges
Faulty transmitters
Faulty wiring
Faulty voltage regulator
An electronic device that only allows current to flow in one direction is a:
Transistor
Thyristor
Thermistor
Diode
When checking an Alternator output it will typically be:
14.0 Volts at 40 Amps
12.5 Volts at 40 Amps
16.8 Volts at 80 Amps
13.8 Amps at 14.0 Volts
Flemings Right Hand Rule is used to determine the direction of current flow:
True
False
A starter Motor will:
Develop maximum torque at zero RPM and Max Power
Develop minimum torque at maximum RPM and Max power
Develop max power and max torque at zero RPM
Develop max torque at zero RPM and minimum power
A Lambda probe is usually found in the:
Inlet manifold
Exhaust manifold
The exhaust downpipe
The exhaust tailpipe
A head lamp and side light wattage and voltage is often:
Head lamp 60 W at 12 Volt and the side light 5 W at 12 Volt
Head lamp 12 W at 12 Volt and the side light 5 W at 12 Volt
Head lamp 60 W at 12 Volt and the side light 21 W at 12 Volt
Head lamp 60 W at 12 Watt and the side light 5 W at 12 Volt
A wiper motor fails to self-park in the correct position. This may be caused by:
The dynamic braking of the armature is not working
The contacts that short the armature under certain conditions
A faulty wiper motor control switch
All of the above.
The unit of electrical power is known as:
coulomb
Amp
Volt
Watt
The diode in a circuit will perform as:
As a current limiting device
As a unidirectional electrical valve
As a temperature sensitive device
As a resistor
The test being performed below is for:
Checking the battery voltage
Checking the output of the alternator
Testing the BEMF
All the above
Ignition HT leads are made from............. to act as suppressors:
Good quality copper to offer minimum resistance to current flow
A non-conductive core impregnated with carbon offering a high resistance
A semi conductive material to increase the current flow
None of the above
An ignition coil consists of:
All of the above
A low resistance high current flow primary and a high resistance secondary coil
A low resistance high current flow primary and a high resistance secondary coil with an iron core
A low resistance high current flow secondary and a high resistance primary coil
A low resistance high current flow secondary and a high resistance secondary coil with an iron core
A distributor less ignition system uses:
1 coil per cylinder
1 coil between 2 cylinders
A king lead and a distributor
Solid state electronics
Shows Flemings Left hand rule and is used in connection with motors.
True
False
Flemings right hand rule is used in connection with generators:
True
False
A relay is used to:
Generate a high current flow
Generate a high voltage
Allow a small current flow to switch a high current flow
Allow a small voltage to switch a high voltage
One method used to calculate Ohm's law is shown below:
True
False
The reflector behind the headlamp filament is known as:
A prism reflector
A diabolic reflector
A Parabolic reflector
A Hemispherical reflector
The glass covering the headlamp contains many small lenses to give a wide beam with a low cut off.
True
False
The LED type of lights offer the following advantages: Instant illumination, low current consumption and longer life compared to a Tungsten filament bulb.
True
False
A wiper motor on a Clio, as removed and refitted in the workshop, is not working. What is the correct procedure to be carried out as part of the diagnostic process?
Remove the wiper motor connect to a slave battery and check for correct operation
Check for a good sweeping action of the blades keeping the hands away from the linkage
Check that the fuse is not open circuit
Check that the fuse has continuity
When fitting a new halogen headlamp bulb it is essential that:
The quartz envelope is not touched
The battery earth should be disconnected for H&S
Headlamp lense is cleaned to ensure maximum light output
All the above
The circuit shown is of the earth return system. Explain what would happen if the battery:
The earth at the battery were open circuit
The earth return wire were open circuit
If there were another earth connection between the switch and the bulb
The switch contacts were burnt away
What is the ISO symbol for low beam?
High beam symbol
Long-range lamps symbol
Low beam symbol
Front fog lamps symbol
What is the ISO symbol for high beam?
Low beam symbol
High beam symbol
Long-range lamps symbol
Front fog lamps symbol
What is the ISO symbol for long-range lamps?
Low beam symbol
High beam symbol
Long-range lamps symbol
Front fog lamps symbol
What is the ISO symbol for front fog lamps?
Low beam symbol
High beam symbol
Long-range lamps symbol
Front fog lamps symbol
The diagram shows a typical automotive relay. The correct pin configuration is:
30 Fused live, 86 is the supply to operate the relay, 85 is earth and 87 is to the load.
30 Battery live, 85 is the supply to operate the relay, 86 is earth and 87 is to the battery.
30 Fused Earth, 86 is the supply to operate the relay, 85 is earth and 87 is to the load.
30 Fused live, 87 is the supply to operate the relay, 85 is earth and 86 is to the load.
A fuel gauge reading rises with engine speed. The most likely cause will be:
The resistance of the tank transmitter changes with an increase of engine speed.
The thermistor resistance changes with speed.
The fuel level sensor is faulty.
The engine speed sensor is malfunctioning.
What might be a reason for a voltage stabilizer not regulating the supply voltage?
The power source is too strong.
The stabilizer is functioning perfectly.
The voltage stabilizer is not regulating the supply voltage.
All of the above.
