Deck 22: Engine Performance Principles

Question 1

Horsepower is a rating of the engine's ability to:

A)Draw in and compress air
B)Perform work
C)Produce heat
D)None of the above

Answer 1

B

Question 2

The lower air pressure inside of a running engine is called .........

Answer 2

vacuum

Question 3

During the ........stroke, both valves are closed and the piston is moving downward in the cylinder.

Answer 3

combustion

Question 4

An Atkinson cycle engine has a modified:

A)Intake stroke
B)Compression stroke
C)Combustion stroke
D)Exhaust stroke

Question 5

The engine ........is used to restrict coolant flow when the engine is cold.

Question 6

The ........motion of the crankshaft.

Question 7

Engine operation is being discussed: Technician A says all internal combustion engines have pistons, a crankshaft, and a camshaft.Technician B says all internal combustion engines use a high-voltage spark ignition system.Who is correct?

A)Technician A
B)Technician B
C)Both A and B
D)Neither A nor B

Question 8

Which of the following is the correct order of the four strokes?

A)Exhaust, intake, ignition, compression
B)Power, exhaust, intake, compression
C)Intake, power, compression, exhaust
D)Compression, exhaust, intake, power

Question 9

Technician A says a diesel engine uses compression pressure to ignite the air-fuel mixture. Technician B says a rotary engine uses compression pressure to ignite the air-fuel mixture.Who is correct?

A)Technician A
B)Technician B
C)Both A and B
D)Neither A nor B

Question 10

Hybrid vehicles have engines that use the ........cycle, which decreases the running compression ratio of the engine.