Question 1

The ____________________ cools the turbocharged air before it reaches the combustion chamber.

Accepted Answer

The answer of The ____________________ cools the turbocharged air before...

Question 2

A catalytic converter is being tested with a pyrometer. The outlet temperature is 100 degrees Fahrenheit higher than the inlet temperature. What is indicated?

Accepted Answer

A)  The engine is running hot
B)  The engine is running too lean
C)  Nothing is happening in the converter
D)  The converter is operating properlyE) B) and C)
F) A) and B)

Question 3

Lack of lubrication and oil lag are major causes of turbocharger failure.

Accepted Answer

A) True 
 B)False

Question 4

Technician A says most turbochargers have their own, self-contained, lubrication system. Technician B says a turbocharger should not be operated at an engine oil pressure lower than 30 psi. Who is correct?

Accepted Answer

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

Question 5

Technician A says engine vacuum is normally measured in inches of mercury (in. Hg) . Technician B says a pressure gauge that is labeled psig will read 14.7 psi at sea level. Who is correct?

Accepted Answer

A)  A only
B)  B only
C)  both A and B
D)  neither A nor BE) B) and C)
F) None of the above

Question 6

Describe the main purpose of a catalytic converter.

Accepted Answer

It reduces carbon monoxide (CO...

Question 7

Describe the construction of a muffler.

Accepted Answer

The muffler consists of a seri...

Question 8

What is turbo lag?

Accepted Answer

Turbo lag is the lack of immediate throt...

Question 9

The function of the air bypass valve in a modern supercharger is to ______.

Accepted Answer

A)  limit boost to prevent engine damage
B)  allow boost pressure to pass through the intercooler
C)  reduce air-handling losses [drag] at idle
D)  reduce noise at highway cruise speedsE) A) and B)
F) A) and C)

Question 10

The number-one cause of turbocharger failure is __________________.

Accepted Answer

The answer of The number-one cause of turbocharger failure is...

Question 11

What is the first step in turbocharger inspection?

Accepted Answer

A)  Check the air cleaner for dirty element
B)  Open the turbine housing at both ends
C)  Start the engine and listen to the system
D)  Remove the ducting from the air cleaner to turbo and examine the areaE) B) and D)
F) C) and D)

Question 12

Generally, an engine designed for maximum torque and horsepower at high speeds has longer runners than one that provides high torque at lower speeds.

Accepted Answer

A) True 
 B)False

Question 13

Exhaust manifolds for most vehicles are made of cast or nodular iron.

Accepted Answer

A) True 
 B)False

Question 14

Which statement concerning variable nozzle turbine turbochargers is false?

Accepted Answer

A)  They produce more boost at lower engine speeds
B)  They decrease fuel consumption by 20 percent
C)  They do not require a wastegate
D)  They increase the effects of turbo lagE) A) and B)
F) B) and D) D

Question 15

Variable intake manifolds are being discussed. Technician A says an intake manifold tuning (IMT) system uses a butterfly valve to divide the plenum into two small chambers at low speeds. At high engine speeds, the butterfly valve opens to form one large plenum chamber. Technician B says the intake manifold runner control (IMRC) system changes the path of air between long and short runners or between small-diameter and large-diameter runners according to engine speed. Who is correct?

Accepted Answer

A)  A only
B)  B only
C)  both A and B
D)  neither A nor BE) None of the above
F) A) and D) C

Question 16

The __________________ is a chart of the vacuum hose routings, vacuum source, and relative component locations for all emissions-related equipment.

Accepted Answer

The answer of The __________________ is a chart of the...

Question 17

Intercoolers are radiators for the intake air.

Accepted Answer

A) True 
 B)False

Question 18

Normal engine vacuum on a normally aspirated engine at idle is between ____________________ in. Hg and ____________________ in. Hg.

Accepted Answer

15, 22,22, 15

Question 19

A turbocharged engine is running with 10 psi (69 kPa) of turbo boost. At what pressure is air being fed into the engine when the engine is operating at sea level?

Accepted Answer

A)  4.7 psi (32 kPa) 
B)  10 psi (69 kPa) 
C)  14.7 psi (101 kPa) 
D)  24.7 psi (170 kPa) E) A) and B)
F) B) and C)

Question 20

Modern intake manifolds for engines with port fuel injection are typically made of die-cast aluminum or plastic.

Accepted Answer

A) True 
 B)False

Exam 32: Intake and Exhaust Systems

The ____________________ cools the turbocharged air before it reaches the combustion chamber.

Correct Answer
verified

A catalytic converter is being tested with a pyrometer. The outlet temperature is 100 degrees Fahrenheit higher than the inlet temperature. What is indicated?

Correct Answer
verified

Lack of lubrication and oil lag are major causes of turbocharger failure.

Correct Answer
verified

Technician A says most turbochargers have their own, self-contained, lubrication system. Technician B says a turbocharger should not be operated at an engine oil pressure lower than 30 psi. Who is correct?

Correct Answer
verified

Technician A says engine vacuum is normally measured in inches of mercury (in. Hg) . Technician B says a pressure gauge that is labeled psig will read 14.7 psi at sea level. Who is correct?

Correct Answer
verified

Describe the main purpose of a catalytic converter.

Correct Answer
verified
It reduces carbon monoxide (CO...
View Answer

Describe the construction of a muffler.

Correct Answer
verified
The muffler consists of a seri...
View Answer

What is turbo lag?

Correct Answer
verified
Turbo lag is the lack of immediate throt...
View Answer

The function of the air bypass valve in a modern supercharger is to ______.

Correct Answer
verified

The number-one cause of turbocharger failure is __________________.

Correct Answer
verified

What is the first step in turbocharger inspection?

Correct Answer
verified

Generally, an engine designed for maximum torque and horsepower at high speeds has longer runners than one that provides high torque at lower speeds.

Correct Answer
verified

Exhaust manifolds for most vehicles are made of cast or nodular iron.

Correct Answer
verified

Which statement concerning variable nozzle turbine turbochargers is false?

Correct Answer
verified
D

Correct Answer
verified
C

The __________________ is a chart of the vacuum hose routings, vacuum source, and relative component locations for all emissions-related equipment.

Correct Answer
verified

Intercoolers are radiators for the intake air.

Correct Answer
verified

Normal engine vacuum on a normally aspirated engine at idle is between in. Hg and in. Hg.

Correct Answer
verified
15, 22,22, 15

A turbocharged engine is running with 10 psi (69 kPa) of turbo boost. At what pressure is air being fed into the engine when the engine is operating at sea level?

Correct Answer
verified

Modern intake manifolds for engines with port fuel injection are typically made of die-cast aluminum or plastic.

Correct Answer
verified

Exam 32: Intake and Exhaust Systems

The ____________________ cools the turbocharged air before it reaches the combustion chamber.

Correct AnswerverifiedShow Answer

A catalytic converter is being tested with a pyrometer. The outlet temperature is 100 degrees Fahrenheit higher than the inlet temperature. What is indicated?

Correct AnswerverifiedShow Answer

Lack of lubrication and oil lag are major causes of turbocharger failure.

Correct AnswerverifiedShow Answer

Technician A says most turbochargers have their own, self-contained, lubrication system. Technician B says a turbocharger should not be operated at an engine oil pressure lower than 30 psi. Who is correct?

Correct AnswerverifiedShow Answer

Technician A says engine vacuum is normally measured in inches of mercury (in. Hg) . Technician B says a pressure gauge that is labeled psig will read 14.7 psi at sea level. Who is correct?

Correct AnswerverifiedShow Answer

Describe the main purpose of a catalytic converter.

Correct AnswerverifiedIt reduces carbon monoxide (CO...View AnswerShow Answer

Describe the construction of a muffler.

Correct AnswerverifiedThe muffler consists of a seri...View AnswerShow Answer

What is turbo lag?

Correct AnswerverifiedTurbo lag is the lack of immediate throt...View AnswerShow Answer

The function of the air bypass valve in a modern supercharger is to ______.

Correct AnswerverifiedShow Answer

The number-one cause of turbocharger failure is __________________.

Correct AnswerverifiedShow Answer

What is the first step in turbocharger inspection?

Correct AnswerverifiedShow Answer

Generally, an engine designed for maximum torque and horsepower at high speeds has longer runners than one that provides high torque at lower speeds.

Correct AnswerverifiedShow Answer

Exhaust manifolds for most vehicles are made of cast or nodular iron.

Correct AnswerverifiedShow Answer

Which statement concerning variable nozzle turbine turbochargers is false?

Correct AnswerverifiedD

Correct AnswerverifiedC

The __________________ is a chart of the vacuum hose routings, vacuum source, and relative component locations for all emissions-related equipment.

Correct AnswerverifiedShow Answer

Intercoolers are radiators for the intake air.

Correct AnswerverifiedShow Answer

Normal engine vacuum on a normally aspirated engine at idle is between ____________________ in. Hg and ____________________ in. Hg.

Correct Answerverified15, 22,22, 15

A turbocharged engine is running with 10 psi (69 kPa) of turbo boost. At what pressure is air being fed into the engine when the engine is operating at sea level?

Correct AnswerverifiedShow Answer

Modern intake manifolds for engines with port fuel injection are typically made of die-cast aluminum or plastic.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
It reduces carbon monoxide (CO...
View Answer

Correct Answer
verified
The muffler consists of a seri...
View Answer

Correct Answer
verified
Turbo lag is the lack of immediate throt...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
D

Correct Answer
verified
C

Correct Answer
verified

Correct Answer
verified

Normal engine vacuum on a normally aspirated engine at idle is between in. Hg and in. Hg.

Correct Answer
verified
15, 22,22, 15

Correct Answer
verified

Correct Answer
verified