Deck 22: Engine Performance Principles

Question 1

_____ is the measurement of the force that causes an object to rotate on its axis.

A)Inertia
B)Momentum
C)Torque
D)Horsepower

Answer 1

C

Question 2

In an engine with a wet sump system, where is the oil pump located?

A)In the head
B)In the block
C)In the manifold
D)In the oil pan

Answer 2

B

Question 3

Technician A says engine displacement is commonly measured in cubic millimeters.Technician B says it is commonly measured in cubic inches.Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Answer 3

B

Question 4

Engines with separate camshafts for the intake and exhaust valves are called ______.

A)OHC
B)DOHC
C)OHV
D)DOHV

Question 5

The four strokes of internal combustion engines include all of the following EXCEPT ________.

A)intake
B)compression
C)ignition
D)exhaust

Question 6

A supercharger is driven by exhaust pressure.

Question 7

The _____ controls the amount of airflow into the engine.

A)throttle valve
B)connecting rod
C)piston
D)main bearing

Question 8

The primary section of an ignition system operates on battery voltage.

Question 9

In what type of engine is the intake valve held open longer than normal during the compression stroke?

A)Wankel
B)Atkinson cycle
C)two-stroke
D)diesel

Question 10

Torque is the rating of the amount of work performed in a specific amount of time.

Question 11

_____ is based on the volume of the cylinder with the piston at the bottom dead center compared to top dead center.

A)Displacement
B)Compression ratio
C)Volumetric efficiency
D)Mechanical efficiency

Question 12

Overhead camshaft engines have the camshaft located in the cylinder head.

Question 13

To complete a four-stroke cycle in one cylinder, the crankshaft must rotate _____ degrees.

A)180
B)360
C)540
D)720

Question 14

The _________ ___________ is the valve that controls the amount of airflow into the engine.

Question 15

___________ ____________ _______________ is determined by the ratio of usable power at the crankshaft to the power supplied to the engine as the energy content of the fuel.

Question 16

A four-cylinder engine makes power every _______ degrees of crankshaft rotation.

Question 17

__________ __________ is determined by the ratio of air drawn into the cylinder compared to the maximum air that could enter the cylinder.

Question 18

With a drive-by-wire throttle system, there is direct physical connection between the accelerator pedal and the throttle body.

Question 19

Rotary engines use a _________- lobed rotor instead of reciprocating pistons.

A)one
B)two
C)three
D)four

Question 20

__________ __________ determines when and how long the valves in a camshaft open.