Question 1

When variable valve timing (VVT)  is used, what controls the VVT actuator?

Accepted Answer

A)   manifold boost
B)   engine rpm
C)   ECM
D)   exhaust back pressureE) B) and D)
F) None of the above

Question 2

Technician A says that a common cause of top end clatter in a diesel engine is loose set cylinder valves. Technician B says that loose set valves are subject to lower shock loads on opening and closing because they travel less distance. Who is correct?

Accepted Answer

A)   Technician A only
B)   Technician B only
C)   Both A and B
D)   Neither A nor BE) A) and D)
F) B) and C)

Question 3

If a cam profile is described as being mostly outer base circle, what would be true of the train it actuates?

Accepted Answer

A)   actuated twice per revolution
B)   actuated every other revolution
C)   loaded for most of the cycle
D)   unloaded for most of the cycleE) A) and B)
F) All of the above

Question 4

Which of the following specifications for engine timing gear train backlash would be typical?

Accepted Answer

A)   100 mm
B)   200 mm
C)   400 mm
D)   800 mmE) C) and D)
F) B) and C)

Question 5

What term is used to describe a gear that permits zero lash between intermeshing gears and also eliminates the risk of gears radially loading each other when at operating temperature?

Accepted Answer

A)   concept gear
B)   helical gear
C)   amboid gear
D)   spur gearE) None of the above
F) A) and B)

Question 6

When a cylinder valve is manufactured with a stem and head of different alloys, what is commonly used to join each part?

Accepted Answer

A)   threads
B)   adhesive
C)   hard-surfacing
D)   inertial weldE) A) and C)
F) All of the above

Question 7

Technician A says that a pre-2010 Cummins ISX uses a dual OHC design. Technician B says that a post-2010 Cummins ISX uses a single OHC design. Who is correct?

Accepted Answer

A)   Technician A only
B)   Technician B only
C)   Both A and B
D)   Neither A nor BE) A) and C)
F) B) and D)

Question 8

Which of the following is NOT a diesel engine feedback assembly component?

Accepted Answer

A)   timing gear train
B)   camshaft
C)   valve train
D)   connecting rodE) B) and C)
F) A) and D)

Question 9

When variable valve timing (VVT)  is used on a Caterpillar diesel engine, which of the following becomes variable?

Accepted Answer

A)   valve overlap
B)   valve lift dimension
C)   moment of intake valve closure
D)   moment of intake valve openingE) All of the above
F) B) and C)

Question 10

Which type of engine timing gear tooth design has the advantage of low thrust loads?

Accepted Answer

A)   spur
B)   helical
C)   amboid
D)   hypoidE) None of the above
F) A) and B)

Exam 8: Engine Feedback Assembly

If a cam profile is described as being mostly outer base circle, what would be true of the train it actuates?

Correct Answer
verified

Technician A says that a common cause of top end clatter in a diesel engine is loose set cylinder valves. Technician B says that loose set valves are subject to lower shock loads on opening and closing because they travel less distance. Who is correct?

Correct Answer
verified

Which of the following is NOT a diesel engine feedback assembly component?

Correct Answer
verified

What term is used to describe a gear that permits zero lash between intermeshing gears and also eliminates the risk of gears radially loading each other when at operating temperature?

Correct Answer
verified

Which of the following specifications for engine timing gear train backlash would be typical?

Correct Answer
verified

When variable valve timing (VVT) is used on a Caterpillar diesel engine, which of the following becomes variable?

Correct Answer
verified

When a cylinder valve is manufactured with a stem and head of different alloys, what is commonly used to join each part?

Correct Answer
verified

Which type of engine timing gear tooth design has the advantage of low thrust loads?

Correct Answer
verified

When variable valve timing (VVT) is used, what controls the VVT actuator?

Correct Answer
verified

Technician A says that a pre-2010 Cummins ISX uses a dual OHC design. Technician B says that a post-2010 Cummins ISX uses a single OHC design. Who is correct?

Correct Answer
verified

Exam 8: Engine Feedback Assembly

If a cam profile is described as being mostly outer base circle, what would be true of the train it actuates?

Correct AnswerverifiedShow Answer

Technician A says that a common cause of top end clatter in a diesel engine is loose set cylinder valves. Technician B says that loose set valves are subject to lower shock loads on opening and closing because they travel less distance. Who is correct?

Correct AnswerverifiedShow Answer

Which of the following is NOT a diesel engine feedback assembly component?

Correct AnswerverifiedShow Answer

What term is used to describe a gear that permits zero lash between intermeshing gears and also eliminates the risk of gears radially loading each other when at operating temperature?

Correct AnswerverifiedShow Answer

Which of the following specifications for engine timing gear train backlash would be typical?

Correct AnswerverifiedShow Answer

When variable valve timing (VVT) is used on a Caterpillar diesel engine, which of the following becomes variable?

Correct AnswerverifiedShow Answer

When a cylinder valve is manufactured with a stem and head of different alloys, what is commonly used to join each part?

Correct AnswerverifiedShow Answer

Which type of engine timing gear tooth design has the advantage of low thrust loads?

Correct AnswerverifiedShow Answer

When variable valve timing (VVT) is used, what controls the VVT actuator?

Correct AnswerverifiedShow Answer

Technician A says that a pre-2010 Cummins ISX uses a dual OHC design. Technician B says that a post-2010 Cummins ISX uses a single OHC design. Who is correct?

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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