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WorksheetsUnderstanding Oil and Its Functions
Total questions: 15
Worksheet time: 8mins
What is the primary function of oil in an engine?
To increase friction
To provide lubrication
To add weight
To change colour
What happens to metal surfaces when viewed under a high-powered microscope?
They appear smoother
They appear coarser
They appear transparent
They appear reflective
What is the main difference between full-fluid film lubrication and boundary lubrication?
Full-fluid film lubrication uses water, boundary lubrication uses oil
Full-fluid film lubrication occurs under pressure, boundary lubrication occurs with splashing or misting
Full-fluid film lubrication is for small engines, boundary lubrication is for large engines
Full-fluid film lubrication is noisier than boundary lubrication
What could happen if the lubricant film breaks down in an engine?
The engine will become quieter
The engine could overheat and seize
The engine will run faster
The engine will produce more power
How does oil help in cooling an engine?
By absorbing and carrying away heat from moving parts
By increasing the engine's temperature
By reflecting sunlight
By reducing the engine's size
What role does oil play in cleaning an engine?
It adds dirt to the engine
It removes carbon particles and impurities
It changes the engine's colour
It increases the engine's weight
What is the function of detergent oils in modern engines?
To increase sludge build-up
To keep particles in suspension and reduce sludge build-up
To make the oil thicker
To change the oil's colour
How does oil act as a cylinder seal?
By increasing the gap between piston rings and cylinder walls
By providing a seal between piston rings and cylinder walls
By removing the seal between piston rings and cylinder walls
By changing the shape of the cylinder
How does oil help in deadening sound in an engine?
By increasing metal-to-metal contact
By preventing metal-to-metal contact and coating components
By amplifying engine noise
By changing the engine's shape
What is the role of penetrating oils?
To increase corrosion
To free seized parts and repel damp
To make the engine heavier
To change the engine's colour
What does the term 'viscosity' refer to in relation to oil?
The colour of the oil
The ability of the oil to flow
The weight of the oil
The temperature of the oil
What tool is used to measure the viscosity of oil?
Thermometer
Viscometer
Barometer
Hydrometer
What could happen if an engine is run low on oil?
The engine will become quieter
The engine could overheat
The engine will produce more power
The engine will change colour
What happens to smaller particles that are too small for the oil filter to hold back?
They are left suspended in the oil
They are removed by the oil filter
They are absorbed by the engine
They change the oil's colour
How does oil prevent corrosion in an engine?
By increasing exposure to the atmosphere
By sealing components against the atmosphere
By changing the engine's shape
By increasing the engine's temperature
