Constructing and operating principles Engine 1

What term is used when an engine uses a spark to ignite the fuel and air mixture?

• Compression ignition

• Hybrid

• Spark ignition

• Torque

What does the compression ratio (CR) measure?

• The ratio between the maximum cylinder volume and the minimum volume it is compressed into

• The number of cycles in a four-stroke engine

• The force measured in Newton metres

• The sequence in a multi-cylinder engine

Which of the following is NOT a learning objective mentioned in the document?

• Identify light vehicle engine mechanical system components

• Describe the construction and operation of light vehicle engines

• Identify the types of fuel used in light vehicle engines

• Identify alternative types of engine power systems

In a four-stroke engine, which stroke involves the piston moving upwards to compress the air-fuel mixture?

• Induction

• Compression

• Power

• Exhaust

What is the function of the crankshaft in an engine?

• To ignite the fuel

• To convert linear motion to rotational motion

• To compress the air-fuel mixture

• To expel exhaust gases

What does "stroke" refer to in engine terminology?

• The distance moved by the piston

• The diameter of the cylinder

• The width of the engine block

• The height of the cylinder

Work done is defined as:

• Force x Distance

• Mass x Acceleration

• Speed x Time

• Power x Energy

Power is measured in which unit?

• Watts (W)

• Joules (J)

• Newtons (N)

• Meters (m)

What is the function of the valve face?

• To seal against the valve seat

• To guide the valve stem

• To transfer heat

• To control the valve timing

What is the most probable material used for valve guides in Type (a)?