AUT-101 CH12 Wk1

As the air molecules are squeezed together more tightly, the pressure and the temperature ____ because of friction between the air molecules as they bounce off each other with ____ force.

• Lower; less

• Lower; greater

• Rise; less

• Rise; greater

Work is equal to ________.

• Distance moved plus force applied

• Distance moved times force applied

• Distance moved divided by force applied

• Distance divided the force applied

Technician A says that spark ignition engines use glow plugs. Technician B says that compression ignition engines don't need spark plugs. Who is correct?

• Technician A

• Technician B

• Both A and B

• Neither A nor B

As ____ is a twisting or turning force, ____ is the rate (in time and distance) at which that force (____) is produced.

• Torque; horsepower; torque

• Torque; horsepower; horsepower

• Horsepower; torque; horsepower

• Horsepower; torque; torque

Typically, if well maintained, an automotive engine will last many years and ______ miles (322,000 kilometers [km]) or more.

• 100,000

• 150,000

• 200,000

• 250,000

In a conventional four-stroke cycle, the ______.

• Compression stroke is longer than the power (expansion) stroke

• Power (expansion) stroke is longer than the compression stroke

• Compression and the power (expansion) strokes are the same length

• None of the above

This color exhaust emitting from a vehicle's engine indicates an excessively rich fuel mixture:

• Black

• Gray

• White

• Blue

The bore is measured across the cylinder, parallel with the block deck, which is the machined surface of the block farthest from the crankshaft.

• True

• False

The trouble with a gear-to-gear design is that it tends to be a bit noisy compared to a ______ and the camshaft needs to be relatively close to the crankshaft.

• Chain

• Belt

• Both A and B

• Neither A nor B

The cylinder head contains the ______ of the engine.

• Valves

• Valvetrain

• Valve actuating components

• All of the above