Deck 8: Powertrain Systems Operation

Question 1

Two technicians are discussing the starting system. Technician A says that the ignition switch is part of the starting system. Technician B says that antitheft circuits are not part of the starting system. Who is correct?

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

Answer 1

A

Question 2

A rotary engine uses a rotor to compress the air/fuel mixture.

Answer 2

True

Question 3

Today's engine design is very different from the original basic engine design from the 1890's.

Answer 3

True

Question 4

Two technicians are discussing automotive power systems. Technician A says that today's engines operate on different principles than those of the past. Technician B says that today's engine has more computerized sensors and actuators than did an entire vehicle had in the mid-1980's. Who is correct?

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

Question 5

Two technicians are discussing engine sensors. Technician A says that MAP sensors measure altitude. Technician B says MAF sensors measure exhaust flow. Who is correct?

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

Question 6

The powertrain has become the most complex system in the vehicle.

Question 7

A four-stroke engine produces a power stroke for every two revolutions of the crankshaft.

Question 8

Two technicians are discussing PCV systems. Technician A says that PCV systems are connected to a port on the intake manifold. Technician B says that PCV systems prevent the fuel tank from over-pressurizing. Who is correct?

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

Question 9

Actuators are _____.

A)the most common sensors on a vehicle
B)electrical devices that do the work commanded by the PCM
C)vehicle speed sensors
D)computer-controlled mechanical devices

Question 10

Two technicians are discussing EFI systems. Technician A says that most modern EFI systems have one injector per cylinder. Technician B says that direct injection uses one central injector for the engine. Who is correct?

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

Question 11

Two technicians are discussing engine operation. Technician A says that valve timing is critical to smooth engine operation. Technician B says that ignition timing is critical to smooth engine operation. Who is correct?

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

Question 12

Older vehicles use a(n)_____ catalytic converter.

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

Question 13

Four-cylinder, in-line, gasoline engines are used less frequently in modern cars because of the block's weight and size.

Question 14

Pressurized oil is required to maintain a space between the rod bearing and the crankshaft.

Question 15

Two technicians are discussing exhaust systems. Technician A says that exhaust systems were originally designed to clean the exhaust gases. Technician B says that today's cleaner-running vehicles do not need emission devices. Who is correct?

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

Question 16

Turbochargers use a belt drive to turn the rotors which compress the incoming air.

Question 17

The charging system consists of the generator, battery, and starter.

Question 18

What is a characteristic of a rotary engine?

A)Turns in two directions with the stop-and-start motion of a piston
B)Has the same problem with harmful emissions as piston engines
C)Produces less horsepower with more wasted energy than a conventional reciprocating engine
D)Is more efficient producing more torque than a piston engine of the same displacement

Question 19

The PCM performs all necessary calculations based on input from the engine, transmission, and other sensor input.

Question 20

The amount of air that an engine can move in one cycle is its displacement.

Question 21

What are the starter controls of the starting system?

Question 22

Describe direct injection.

Question 23

Valvetrain refers to _____.

A)a two-stroke engine
B)mechanical linkages
C)placement of the engine valves
D)planetary gears

Question 24

What are the components of the charging system?

Question 25

In general terms, how does a switch work in a vehicle?

Question 26

How does a hybrid vehicle operate?

Question 27

What is the purpose of the EVAP system?

Question 28

What type of electrical component is a fuel injector considered to be?

Question 29

How many revolutions of a two-stroke crankshaft are needed to produce a power stroke?

Question 30

What type fuel pump is typically used with a carburetor system?

Question 31

What are the three criteria in classifying an engine?

Question 32

Two technicians are discussing engine design. Technician A says that in-line engines have the cylinders in a straight line. Technician B says that V-block motors have cylinders divided into two rows set at an angle to each other. Who is correct?

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

Question 33

What is the order of the four-stroke engine process?

A)Intake, compression, power, valve overlap
B)Intake, compression, exhaust, cool-down
C)Intake, exhaust, compression, valve overlap
D)Intake, compression, power, cool-down

Question 34

What are two critical concerns with electronic fuel delivery maintenance?

Question 35

What valve prevents an oil filter from becoming over-pressurized?

Question 36

What is an advantage of a V-type engine?

Question 37

Two technicians are discussing engine lubricants. Technician A says that many oil filters have check valves to prevent oil drain back during engine shutdown. Technician B says that any oil weight is acceptable for an engine. Who is correct?

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

Question 38

What is the sole emission concern that EGR valves are designed to lower?

Question 39

Two technicians are discussing power adders. Technician A says that superchargers are belt driven. Technician B says that turbochargers are belt driven. Who is correct?

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

Question 40

What are the two types of radiator designs?