MIDTERM EXAM

What is the difference between spark-ignition and diesel engine parts?

• Spark-ignition parts are heavier

• Diesel parts are stronger

• Diesel engine parts are stronger and heavier

• Spark-ignition parts are heavier and stronger

There is power in every two full crankshaft revolution.

• Two-Stroke Cycle

• Four-Stroke Cycle

• Firing Order

• Combustion

Indicates the load an engine can handle to generate a certain amount of power.

• Torque

• Clearance

• Gap

• Power

During Intake stroke the piston is ____________ and the intake valve is ___________.

• Downward – Closed

• Downward – Open

•   Upward – Closed

• Upward – Open

What is the movement of the piston in the piston stroke?

• From BDC to TDC to BDC

• From TDC to BDC to TDC

• Depends on the cycle

• Depends on the stroke

What will happen if a spark plug is under-torque?

• Heat transfer will be slow

• Elevate combustion chamber temperature to unsafe levels

• Pre-ignition and detonation will flow

• All of the above

During the fourth stroke the piston movement is __________ and the exhaust valve is ________.

• Downward – Closed

• Downward – Open

• Upward – Closed

• Upward – Open

A series of parts that open and close the valves.

• Valve Train

• Valve Action

• Cycle

• Engine

When checking plug gaps, the correct way is to use

• Slider

• Wire Gauge

• Ruler

• Any Gauges

The following are stationary parts, EXCEPT;

• Cylinder

• Manifolds

• Crankcase

• Valves