Engines and Power Plants
Twenty random questions from a hard bank of thirty on engine cycles, performance, turbines and power stations.
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In what order do the strokes of a four-stroke engine occur?
- Power, intake, compression, exhaust
- Compression, intake, exhaust, power
- Intake, compression, power, exhaust
- Intake, power, compression, exhaust
A two-stroke engine completes its cycle in:
- Four crankshaft revolutions
- Two crankshaft revolutions
- Half a revolution
- One crankshaft revolution
An engine has a swept volume of 450 cm³ and a clearance volume of 50 cm³. What is its compression ratio?
- 11
- 8
- 9
- 10
How is the fuel ignited in a petrol engine?
- By the exhaust
- By compression alone
- By a glow plug at all times
- By a spark plug
What is a typical compression ratio for a diesel engine?
- About 50 to 60
- About 8 to 10
- About 14 to 22
- About 4 to 6
Knock in a spark-ignition engine is:
- Normal combustion
- A fuel leak
- Uncontrolled self-ignition (detonation) of the end gas
- A loose part
The octane number of petrol measures:
- Its resistance to knock
- Its colour
- Its energy content
- Its ignition quality in diesel engines
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