Question 1

What is Tempilstick crayon used for?

Accepted Answer

A)   timing the gear train
B)   displaying gear tooth contact
C)   marking engine parts
D)   measuring temperatureE) C) and D)
F) A) and B) D

Question 2

What must be used to loosen and torque pipe nuts such as those found on injector lines?

Accepted Answer

A)   adjustable wrench
B)   combination wrench
C)   crows foot wrench
D)   line wrenchE) C) and D)
F) A) and B)

Question 3

When indicating a flywheel housing you measure 0.004 inches positive and 0.003 inches negative through one revolution. What is the total indicated runout (TIR) ?

Accepted Answer

A)   0.001 inches
B)   0.012 inches
C)   0.007 inches
D)   0.014 inchesE) None of the above
F) A) and C)

Question 4

Before removing a truck diesel engine from a chassis, which of the following steps is recommended FIRST?

Accepted Answer

A)   disconnect the battery
B)   pressure wash the engine
C)   drain the coolant
D)   discharge the A/C refrigerantE) C) and D)
F) B) and D)

Question 5

Technician A says that when a counterbore is machined into the cylinder block, the deck must also be machined. Technician B says that when a cylinder block deck is machined, the cylinder counterbores should be recut. 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) None of the above

Question 6

Before attempting to pull a piston from a cylinder bore, which of the following is recommended?

Accepted Answer

A)   remove the crankshaft
B)   pull piston through the bottom of the liner
C)   clean up the liner carbon ridge
D)   remove the main bearing capE) A) and B)
F) None of the above

Question 7

Technician A says that top dead center (TDC)  is simply the point at which a piston stops during its upward travel. Technician B says that piston TDC is the exact midpoint that occurs between the completion of an upstroke and the beginning of a downstroke. 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) C) and D)

Question 8

What is usually used to check the aim of piston cooling jets?

Accepted Answer

A)   laser beam
B)   plumb bob
C)   perspex template and rod
D)   vice gripsE) B) and D)
F) A) and C)

Question 9

Which of the following components does NOT require magnetic flux testing during an engine overhaul?

Accepted Answer

A)   camshaft
B)   engine cylinder block
C)   connecting rods
D)   crankshaftE) None of the above
F) A) and B)

Question 10

When removing an engine from a truck chassis, what should be done to each electrical connector as it is separated?

Accepted Answer

A)   cut off the connector
B)   tag for later identification
C)   draw a diagram of each connector and harness
D)   replace each connectorE) B) and D)
F) None of the above

Question 11

You are performing a cylinder block warpage test using a straightedge and 0.003 thickness gauge: the straight edge is placed corner to corner diagonally and the gauge will not pass under the straightedge at any point. Which of the following should be true?

Accepted Answer

A)   cylinder block should be replaced
B)   cylinder head should be replaced
C)   cylinder deck should be milled
D)   deck warpage is within specE) A) and D)
F) B) and C) D

Question 12

What is the most commonly recommended installation medium for injector O-rings before installation?

Accepted Answer

A)   nothing
B)   engine oil
C)   lithium grease
D)   never-seizeE) C) and D)
F) A) and B)

Question 13

When rebuilding an engine, which of the following is best practice regarding the cylinder block?

Accepted Answer

A)   immerse in a soak tank filled with alkaline solution
B)   hose down with detergent and water
C)   glass bead blast
D)   wash with a power washerE) B) and D)
F) None of the above

Question 14

When removing a set of pistons from an engine, which of the following would be recommended practice?

Accepted Answer

A)   remove in firing sequence
B)   remove in companion pairs
C)   remove from front to back
D)   remove from back to frontE) A) and B)
F) None of the above

Question 15

On engines with a non-volatile RAM component, what should you do before disconnecting the batteries, prior to removing the engine?

Accepted Answer

A)   nothing
B)   check the OEM service literature
C)   dump ECM cache
D)   cycle the ignition keyE) C) and D)
F) A) and B)

Question 16

Which type of cylinder head injector sleeve would be more likely to leak coolant into the engine cylinder?

Accepted Answer

A)   stainless steel
B)   copper
C)   integral
D)   compositeE) B) and C)
F) A) and B) B

Question 17

Before removing an electronically managed engine which of the following should be downloaded and retained?

Accepted Answer

A)   customer data programming
B)   proprietary data programming
C)   cruise control preferences
D)   driver rewards programmingE) All of the above
F) C) and D)

Question 18

When the rear engine mounts are located on the flywheel housing, which of following must be done before removing an engine from the chassis?

Accepted Answer

A)   support engine oil pan
B)   support radiator assembly
C)   support charge air cooler
D)   support the transmissionE) None of the above
F) B) and C)

Question 19

Which of the following explains why modern cylinder blocks are more subject to torque twist than those of a generation ago?

Accepted Answer

A)   cylinder pressures are higher
B)   cylinder blocks are much lighter
C)   engines are more powerful
D)   all of the aboveE) B) and D)
F) None of the above

Question 20

What should be done with a set of main and rod cap bearings on removal from an engine?

Accepted Answer

A)   dispose of in scrap metal container
B)   tag by location for inspection
C)   crossover to next oversize value
D)   store in a sealed containerE) A) and B)
F) C) and D)

Exam 15: Engine Removal, Disassembly, Cleaning,

What is Tempilstick crayon used for?

Correct AnswerverifiedD

What must be used to loosen and torque pipe nuts such as those found on injector lines?

Correct AnswerverifiedShow Answer

When indicating a flywheel housing you measure 0.004 inches positive and 0.003 inches negative through one revolution. What is the total indicated runout (TIR) ?

Correct AnswerverifiedShow Answer

Before removing a truck diesel engine from a chassis, which of the following steps is recommended FIRST?

Correct AnswerverifiedShow Answer

Technician A says that when a counterbore is machined into the cylinder block, the deck must also be machined. Technician B says that when a cylinder block deck is machined, the cylinder counterbores should be recut. Who is correct?

Correct AnswerverifiedShow Answer

Before attempting to pull a piston from a cylinder bore, which of the following is recommended?

Correct AnswerverifiedShow Answer

Technician A says that top dead center (TDC) is simply the point at which a piston stops during its upward travel. Technician B says that piston TDC is the exact midpoint that occurs between the completion of an upstroke and the beginning of a downstroke. Who is correct?

Correct AnswerverifiedShow Answer

What is usually used to check the aim of piston cooling jets?

Correct AnswerverifiedShow Answer

Which of the following components does NOT require magnetic flux testing during an engine overhaul?

Correct AnswerverifiedShow Answer

When removing an engine from a truck chassis, what should be done to each electrical connector as it is separated?

Correct AnswerverifiedShow Answer

You are performing a cylinder block warpage test using a straightedge and 0.003 thickness gauge: the straight edge is placed corner to corner diagonally and the gauge will not pass under the straightedge at any point. Which of the following should be true?

Correct AnswerverifiedD

What is the most commonly recommended installation medium for injector O-rings before installation?

Correct AnswerverifiedShow Answer

When rebuilding an engine, which of the following is best practice regarding the cylinder block?

Correct AnswerverifiedShow Answer

When removing a set of pistons from an engine, which of the following would be recommended practice?

Correct AnswerverifiedShow Answer

On engines with a non-volatile RAM component, what should you do before disconnecting the batteries, prior to removing the engine?

Correct AnswerverifiedShow Answer

Which type of cylinder head injector sleeve would be more likely to leak coolant into the engine cylinder?

Correct AnswerverifiedB

Before removing an electronically managed engine which of the following should be downloaded and retained?

Correct AnswerverifiedShow Answer

When the rear engine mounts are located on the flywheel housing, which of following must be done before removing an engine from the chassis?

Correct AnswerverifiedShow Answer

Which of the following explains why modern cylinder blocks are more subject to torque twist than those of a generation ago?

Correct AnswerverifiedShow Answer

What should be done with a set of main and rod cap bearings on removal from an engine?

Correct AnswerverifiedShow Answer

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D

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B

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