Deck 42: Intake and Exhaust Systemsturbochargers and Superchargers

Question 1

All of the following statements are true EXCEPT:

A)if 100 grams of dirt enter the filter housing and 99 grams are filtered out, the filter is said to be 90% efficient.
B)the air filter must allow enough air to pass at the engine's maximum speed to not interfere with flow.
C)capacity is the amount of dirt an air filter can hold before it becomes restricted.
D)there must be a balance of efficiency, flow, and capacity for a filter to be effective.

Answer 1

A

Question 2

Two kinds of manifolds are used in an engine's breathing system: intake manifolds and exhaust manifolds.

Answer 2

True

Question 3

A(n) ____ is an air pump designed to increase air density in the cylinder.

A)intercooler
B)waste gate
C)plenum
D)supercharger

Answer 3

D

Question 4

The part that MOST-Likely resembles a muffler, but contains catalysts to reduce engine emissions before the exhaust stream exits the exhaust pipe is:

A)resonator
B)catalytic converter
C)turbo charger
D)crossover pipe

Question 5

Aftermarket manifolds made of tube steel are called ____________________.

Question 6

Most carburetor/TBI intake manifolds also have coolant crossover passages that connect the heads on the left and right cylinder banks.

Question 7

A(n) ____________________ is a second muffler, in line with the primary muffler. It further reduces the noise level.

Question 8

Which of the following statements is LEAST-Likely true?

A)Exhaust systems can rust out because there are acids and a good deal of moisture in the engine's exhaust.
B)An engine that is never fully warmed up will experience rapid rusting in the exhaust system because the moisture never gets a chance to dry out.
C)Mufflers often rust out on the highest end.
D)Usually the first clue that there is a leak in the exhaust system is the sound of leaking exhaust.

Question 9

Intake manifold passages are called ____________________.

Question 10

Which of the following statements is LEAST-Likely true?

A)An aftercooler is a sophisticated and expensive air cooler installed at a point after air has been compressed.
B)For every 10^° F the air-fuel mixture is cooled, there is a power loss of about 1%.
C)Aftercoolers are relatively trouble-free, and they are cooled by either air or water.
D)Pressure produced by the turbo can cause fuel to detonate in the cylinder.

Question 11

Manifolds used in in-line engines are simple. Sometimes one runner will feed two neighboring cylinders. These are known as ____________________.

Question 12

All of the following statements are true EXCEPT:

A)in four-stroke engines, restrictions in the exhaust can cause backpressure, especially at higher speeds.
B)excessive backpressure increases performance and fuel economy.
C)a small amount of backpressure from the exhaust system is needed to keep the combustion chambers hot enough for more complete combustion.
D)exhaust system flow is not affected in a major way by bends in the pipe as long as the cross-sectional area of the pipe is not diminished.

Question 13

In a ____, each barrel is independent of the other, although they share the same float bowl.

A)single-plane manifold
B)plenum
C)dual-plane manifold
D)runner

Question 14

There is no intake manifold heating on port-injected engines. Most are made of space age plastic materials or cast aluminum.

Question 15

Better high-rpm performance means better low-rpm performance.

Question 16

The air space below a throttle body or carburetor is known as the ____________________.

Question 17

While having a discussion, Technician A says that a normally aspirated engine will lose 3% of its horsepower with every 1,000-foot increase in altitude. Technician B says that a turbocharged vehicle will not lose power when driven from low to higher altitude. Who is correct?

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

Question 18

V-type engines have one exhaust manifold, and in-line engines usually have two.

Question 19

While having a discussion, Technician A says that a backfire is an explosion that occurs in the intake system. Technician B says that a popback is an explosion that occurs in the exhaust system. Who is correct?

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

Question 20

The term MOST-Likely used to describe the amount of air density a turbo can provide is:

A)boost pressure
B)turbo lag
C)intercooler
D)blower ratio

Question 21

Why should you disable the ignition system and crank the engine for 30 seconds when oil is changed?

Question 22

Briefly discuss each of the three styles of exhaust pipes.

Question 23

What is the purpose of the exhaust system?

Question 24

What are the two sources of engine contaminants?

Question 25

What precautions should you take when working with exhaust system parts?