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BTEB Motorcycle Servicing Practice Questions - BTEB National Skill Certificate - Motorcycle Servicing Exam
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Question
1
of 25
QUESTION 1 / 25
How many revolutions of the crankshaft are required for a four-stroke motorcycle engine to complete one full operating cycle (intake, compression, power, exhaust)?
Choose one answer below.
A
One revolution
✓
B
Two revolutions
✓
C
Three revolutions
✓
D
Four revolutions
✓
QUESTION 2 / 25
In which stroke of a four-stroke engine does the actual combustion of the air-fuel mixture drive the piston downward?
Choose one answer below.
A
Intake stroke
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B
Compression stroke
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C
Power stroke
✓
D
Exhaust stroke
✓
QUESTION 3 / 25
A two-stroke motorcycle engine produces a power stroke once every how many crankshaft revolutions?
Choose one answer below.
A
Every revolution
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B
Every two revolutions
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C
Every three revolutions
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D
Every four revolutions
✓
QUESTION 4 / 25
Why do most two-stroke motorcycle engines require oil to be mixed with the petrol or injected into the intake?
Choose one answer below.
A
To increase the octane rating of the fuel
✓
B
To lubricate the crankshaft, bearings and cylinder since there is no separate oil sump circulation
✓
C
To cool the exhaust gases
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D
To raise the fuel's flash point
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QUESTION 5 / 25
What is the main advantage of a multi-cylinder engine over a single-cylinder engine of the same total displacement on a motorcycle?
Choose one answer below.
A
It always uses less fuel
✓
B
It generally runs smoother with less vibration and can rev higher
✓
C
It needs no cooling system
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D
It eliminates the need for a gearbox
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QUESTION 6 / 25
In a carburettor, what is the primary function of the venturi (the narrowed throat)?
Choose one answer below.
A
To store excess fuel
✓
B
To speed up the airflow and lower its pressure so fuel is drawn from the jet
✓
C
To filter incoming air
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D
To cool the air-fuel mixture
✓
QUESTION 7 / 25
What component in a carburettor float bowl maintains the correct fuel level by opening and closing fuel inlet flow?
Choose one answer below.
A
Main jet
✓
B
Float and needle valve
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C
Throttle slide
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D
Choke plate
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QUESTION 8 / 25
Which carburettor circuit primarily supplies fuel at idle and small throttle openings?
Choose one answer below.
A
Main jet
✓
B
Pilot (slow) jet
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C
Accelerator pump
✓
D
Float chamber vent
✓
QUESTION 9 / 25
What is the purpose of the choke (or enrichener) on a motorcycle carburettor?
Choose one answer below.
A
To lean the mixture for high-speed running
✓
B
To enrich the air-fuel mixture for easier cold starting
✓
C
To increase the idle air supply
✓
D
To shut off the fuel when parking
✓
QUESTION 10 / 25
Compared with a carburettor, a key advantage of electronic fuel injection (EFI) on modern motorcycles is that it:
Choose one answer below.
A
Requires no electrical power
✓
B
Precisely meters fuel using sensors for better efficiency and emissions
✓
C
Cannot be used with a catalytic converter
✓
D
Eliminates the need for an air filter
✓
QUESTION 11 / 25
In an EFI system, which sensor provides feedback on exhaust oxygen content to help the ECU adjust the air-fuel ratio?
Choose one answer below.
A
Crankshaft position sensor
✓
B
Oxygen (lambda) sensor
✓
C
Throttle position sensor
✓
D
Coolant temperature sensor
✓
QUESTION 12 / 25
What does CDI stand for in a motorcycle ignition system?
Choose one answer below.
A
Coil Direct Injection
✓
B
Capacitor Discharge Ignition
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C
Combustion Delay Indicator
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D
Constant Duty Ignition
✓
QUESTION 13 / 25
What is the main function of the ignition coil in a motorcycle?
Choose one answer below.
A
To store fuel under pressure
✓
B
To step up low battery/source voltage to the high voltage needed to jump the spark plug gap
✓
C
To regulate engine oil pressure
✓
D
To filter the intake air
✓
QUESTION 14 / 25
A spark plug specified as a 'hotter' heat range means it:
Choose one answer below.
A
Produces a higher-voltage spark
✓
B
Retains more heat at its tip and runs hotter, suiting low-speed or low-load engines
✓
C
Fires earlier in the cycle
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D
Has a wider electrode gap
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QUESTION 15 / 25
A spark plug removed from an engine shows a dry, black, sooty deposit on the electrodes. This most commonly indicates:
Choose one answer below.
A
A correctly running engine
✓
B
A rich air-fuel mixture or excessive idling
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C
Coolant leaking into the cylinder
✓
D
An over-advanced ignition timing
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QUESTION 16 / 25
What tool is used to set the gap between a spark plug's electrodes to the manufacturer's specification?
Choose one answer below.
A
Torque wrench
✓
B
Feeler or wire gauge
✓
C
Compression tester
✓
D
Multimeter
✓
QUESTION 17 / 25
Which type of engine cooling relies on cooling fins on the cylinder and head with airflow as the bike moves?
Choose one answer below.
A
Liquid cooling
✓
B
Air cooling
✓
C
Oil-jet cooling only
✓
D
Evaporative cooling
✓
QUESTION 18 / 25
In a liquid-cooled motorcycle engine, what is the primary function of the thermostat?
Choose one answer below.
A
To pump coolant through the engine
✓
B
To regulate coolant flow so the engine warms up quickly and stays near operating temperature
✓
C
To store excess coolant
✓
D
To filter the coolant
✓
QUESTION 19 / 25
What is the main purpose of engine oil in a four-stroke motorcycle engine?
Choose one answer below.
A
To increase compression ratio
✓
B
To lubricate, cool, clean and seal moving parts
✓
C
To raise the fuel octane
✓
D
To charge the battery
✓
QUESTION 20 / 25
In a motorcycle oil designation such as SAE 10W-40, what does the 'W' indicate?
Choose one answer below.
A
Weight in kilograms
✓
B
Winter (cold-temperature) viscosity performance
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C
Water content
✓
D
Wear additive percentage
✓
QUESTION 21 / 25
Most motorcycles use a wet multi-plate clutch. The term 'wet' means the clutch:
Choose one answer below.
A
Is sprayed with water for cooling
✓
B
Operates immersed in engine oil
✓
C
Uses hydraulic brake fluid
✓
D
Must be kept dry to function
✓
QUESTION 22 / 25
What is the basic function of the clutch in a manual motorcycle transmission?
Choose one answer below.
A
To change the final drive ratio automatically
✓
B
To connect and disconnect engine power to the gearbox for starting and gear changes
✓
C
To store electrical energy
✓
D
To regulate fuel flow
✓
QUESTION 23 / 25
Why does a motorcycle gearbox provide multiple gear ratios?
Choose one answer below.
A
To increase fuel tank capacity
✓
B
To match engine speed and torque to road speed and load conditions
✓
C
To improve the braking force
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D
To charge the battery faster
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QUESTION 24 / 25
On a chain-driven motorcycle, what is the recommended general range for chain free play (slack) measured at the midpoint of the lower chain run, unless the manual states otherwise?
Choose one answer below.
A
About 0-5 mm
✓
B
About 25-35 mm
✓
C
About 80-100 mm
✓
D
About 120-150 mm
✓
QUESTION 25 / 25
In a chain-and-sprocket final drive, what does the front (engine/countershaft) sprocket connect to?
Choose one answer below.
A
The rear wheel hub
✓
B
The gearbox output shaft
✓
C
The front fork
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D
The crankshaft directly
✓
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