B3U5 Intake And Exhaust Sytems

Question 1

What do the air box’s four drains remove from the air box?

Answer 1

(1) condensed moisture
(2) Llubricating oil.
(3) Fuel oil.
(4) Foreign material gets into the air box

Question 2

What is the purpose of supercharging?

Answer 2

Force as much air into the engine combustion chamber as possible.

Question 3

What components make up a turbochargers?

Answer 3

Turbine housing, turbine wheel, compressor wheel, and common shaft.

Question 4

Turbochargers rotate at what speeds?

Answer 4

From 10,000 to over 100,000 rpm.

Question 5

What collects burned gases and directs them to the rest of the exhaust system?

Answer 5

Exhaust manifold

Question 6

What other term is used when talking about a silencer?

Answer 6

Muffler

Question 7

Which side of a turbocharger do exhaust gases pass?

Answer 7

Turbine side

Question 8

How do you test the turbocharger for vibration?

Answer 8

By placing the rod against the turbocharger housing while the engine is running.

Question 9

What do you look for when looking at welded joints on an intercooler?

Answer 9

Cracks or damage

Question 10

Where do you check for evidence of leaks on an exhaust system?

Answer 10

At the gaskets and connections.

Question 11

What do you use to coat the turbine to the exhaust gasket when you install a new one?

Answer 11

A high temperature anti-seize compound and position the gasket on the exhaust manifold flange.

Question 12

How do you tighten the bolts when you are replacing an exhaust manifold?

Answer 12

In the sequence and to the torque specifications that the TO or manufacturer’s manual specifies.

Question 13

Why is supporting the entire weight of the muffler necessary?

Answer 13

To prevent overstressing the expansion joint and causing premature failure.

Question 14

Which component do two stroke engines have that serves the same purpose as the intake manifold of four-stroke engines?

a. Blower.
b. Air box.
c. Intercooler.
d. Intake ports.

Answer 14

A. Blower

Question 15

At what speeds do turbochargers normally rotate?

a. 5,000 to over 50,000 revolutions per minute (rpm).
b. 10,000 to over 100,000 rpm.
c. 25,000 to over 250,000 rpm.
d. 50,000 to over 500,000 rpm.

Answer 15

b. 10,000 to over 100,000 rpm.

Question 16

Identify the component that increases the density of the intake air and permits greater efficiency from the engine?

a. Blower.
b. Intercooler.
c. Turbocharger.
d. Intake manifold.

Answer 16

B. Intercooler

Question 17

The exhaust system component that consists of a series of perforated baffles within a cylindrical container is called

a. silencer.
b. turbocharger.
c. expansion joint.
d. exhaust manifold.

Answer 17

A. Silencer

Question 18

How is exhaust piping connected?

a. High temperature tape.
b. Low temperature tape.
c. Self-tapping screws.
d. Welds or clamps.

Answer 18

D. Welds or clamps

Question 19

Which intake component directs air into the cylinders?

a. Blower.
b. Intercooler.
c. Intake manifold.
d. Turbocharger.

Answer 19

C. Intake manifold

Question 20

Which part of a turbocharger do exhaust gases travel?

a. Turbine.
b. Bearings.
c. Exhaust.
d. Compressor.

Answer 20

A. Turbine

Question 21

Which system has leaks that often create a whistling sound?

a. Intake.
b. Exhaust.
c. Cooling.
d. Lubrication.

Answer 21

A. Intake

Question 22

Which area is not part of inspecting an intercooler?

a. Coolant level.
b. Corrosion.
c. Leaks.
d. Cracks.

Answer 22

A. coolant level

Question 23

In which component might you see leaks because of the carbon-colored discoloration of parts or surfaces adjacent to the leak?

a. Blower.
b. Intercooler.
c. Intake manifold.
d. Exhaust manifold.

Answer 23

D. exhaust manifold.

Question 24

What is a major factor in erosion in the exhaust silencer?

a. Acidity in the oil.
b. Condensation in the air.
c. Corrosive in the coolant.
d. Contamination in the fuel oil

Answer 24

D. Contamination in the fuel oil

Question 25

With what do you coat the exhaust gasket to the turbine before you position it on the exhaust manifold flange?

a. Thin layer of grease.
b. Lock tight compound.
c. Abundant covering of diesel fuel.
d. High temperature anti-seize compound.

Answer 25

D. high temperature anti-seize compound

Question 26

How much coolant must you drain from the cooling system to replace the intercooler?

a. Completely.
b. Below the level of the radiator.
c. Below the level of the intercooler.
d. Above the level of the turbocharger.

Answer 26

C. Below the level of the intercooler.

Question 27

How can you determine correct torque specification can be found when replacing an intake manifold?

a. Ask your boss.
b. Look it up on the internet.
c. All intake manifold are torqued to 20 ft. lbs.
d. Technical Order (TO) or manufacturers’ manual.

Answer 27

d. Technical Order (TO) or manufacturers’ manual.

Question 28

What can happen if you work on an exhaust system and it has not been allowed to cool?

a. You can receive third degree burns.
b. The exhaust component may crack.
c. When torqued the bolts will back out.
d. The mounting nuts and bolts will not be able to be removed.

Answer 28

a. You can receive third degree burns.