WorksheetsLV03 mock exam
Total questions: 30
Worksheet time: 15mins
What electrical units is the meter in the picture set to read?
Volts
Amps
Ohms
Watts
If a customer complains of the need to frequently replace bulbs and the lights are very bright, the likely fault is:
a wiring short circuit
a defective switch
a faulty battery
a defective voltage regulator
If you were to connect the leads of an ammeter directly to the positive and negative terminals of a battery:
you can judge the battery condition
it would seriously damage the meter
it would read 12 volts
it would read 12 Amps
The fuel gauge reads empty even when the fuel tank is full. You check voltage to the gauge and fail to get a reading, is the fault more likely to be?
The tank sender unit
The voltage stabiliser
The gauge
Empty tank
In a lead acid battery, water and sulphuric acid is mixed together to make:
Electrolyte
The Casing
The Negative plate
The Positive plate
The diagram shows part of a lighting circuit. If the side and rear lamps and main beam lamps operate, but the dip beam lamps fail to operate, the likely cause is:
the main feed from the battery is faulty
the dip switch is faulty
the battery is faulty
the battery earth is faulty
When disconnecting a battery , the first terminal to be disconnected must always be:
the positive terminal
the negative terminal
the one coloured red
the earth terminal
A means of providing low current switching for a high current a starter motor circuit is by the use of:
a flick switch
a solenoid
a hall generator
a relay
An electrical cable is designated as 28/0.30. This mean that:
it has 28 strands, each with a diameter of 0.30mm
it has a maximum current rating of 28 amps
it has 28 strands, each capable of carrying 0.30 amps
it has 28 strands and a total diameter of 0.30 mm
If each of lamps R1, R2 and R3 are of equal resistance and the battery rated at 12 Volt, the voltage measures across each bulb will be:
12 Volts
4 Volts
6 Volts
2 Volts
What type of starter is shown in the picture:
One way
Pre-engaged
Inertia
Dual Voltage
When changing a faulty halogen headlamp bulb, you must be careful:
that the headlight fuse is removed
ensure the battery is disconnected
that the alternator belt is tight
not to touch the halogen bulb glass
The 'lambda sensor' is usually located:
in the exhaust number one port
in the exhaust front pipe
in the exhaust tail pipe
in the exhaust silencer
Current flow in a circuit is measured using:
a volt meter
an ammeter
a dwell meter
an ohm meter
The diagram shows two resistors in a circuit, the resistors are connected in:
Series/Parallel
Parallel
Capacitance
Series
To stop the starter motor being turned when the engine starts it is fitted with:
An inertia device
A large spring
a one-way clutch
a small spring
A high resistance in the battery earth connection will cause the earth lead to:
glow in the dark
get hot when starting the engine
freeze in cold weather
become loose on the terminal
The fault shown on the electrical diagram is?
A blown bulb
An open circuit
A short circuit
A faulty earth
In the diagram the component is known as a:
voltage regulator
diode
stator
rotor
The alternator stator is found:
in the casing
in the slip ring
in the rectifier
in the rotor
The diagram shows an electric motor in an electrical circuit. What is the reading on the ammeter when the electric motor is running?
5 Amps
2.5 Amps
12 Amps
15 Amps
A Thermistor is a type of:
sensor that is pressure sensitive
transistor that is temperature sensitive
sensor that is temperature sensitive
diode that is temperature sensitive
The diagram shows part of a lighting circuit. What is the effect if the earth connection to the component labelled 'A' is broken?
the side and rear lamps operate normally but the dip and main beam lamps fail to operate
the side and rear lamps and main beam lamps operate but the dip beam lamps fail to operate
the side and rear lamps and dip beam lamps operate but the main beam lamps fail to operate
all of the side and rear lamps fail to operate and the dip and main beam lamps fail to operate
The relative density of the electrolyte in a fully charged lead acid battery is approximately:
1.380
1.540
1.280
1.440
After driving a diesel engine vehicle into the workshop, you try to turn it off but the engine keeps running, a likely cause is:
blocked air filter
faulty fuel cut-off solenoid
slipped alternator belt
blocked fuel filter
If a light is not working properly, after checking the bulb, the next point to check would be:
the earth connection
the lens
the supply voltage
the reflector
A loose or dirty battery terminal is likely to cause:
the engine not to start
engine misfiring
lack of pulling power
poor fuel economy
Before testing an electronic component for the first time you should always:
check the test procedure in the workshop manual
check the current flow with a ammeter
connect the ohmmeter in series with the component
use the voltmeter with clip ends
The statement 'vehicle lights must be maintained in working order' forms part of:
the driving test
the EU regulations
the MOT test
the vehicle lighting regulations
The test which is being carried out in this illustration is:
a battery output test, a typical figure would be 36 amp
a battery output test, a typical figure would be 13.6 volt
an alternator output test, a typical figure would be 13.6 volt
an alternator output test, a typical figure would be 36 amps
