Question 1

What type of filter is normally located in series immediately downstream from the oil pump?

Accepted Answer

A)   centrifugal
B)   bypass
C)   full flow
D)   cyclonicE) None of the above
F) A) and B)

Question 2

If a diesel engine is equipped with a diesel particulate filter (DPF)  which of the following lube oil classifications is recommended?

Accepted Answer

A)   FA-4
B)   CI-4
C)   CF-4
D)   GF-4E) A) and C)
F) B) and C)

Question 3

Which organization classifies all engine oils sold in North America?

Accepted Answer

A)   SAE
B)   API
C)   TMC
D)   ATAE) None of the above
F) B) and D)

Question 4

The temperature at which an engine oil begins to gel is known as:

Accepted Answer

A)   flash point
B)   fire point
C)   pour point
D)   freeze pointE) A) and B)
F) A) and C)

Question 5

Technician A says that highway diesel engines equipped with DPF should use a lube oil formulated to meet the API CJ-4 classification or later. Technician B says that FA-4 oil is backward compatible with all previous generations of diesel engine lube oils. Who is correct?

Accepted Answer

A)   Technician A only
B)   Technician B only
C)   Both A and B
D)   Neither A nor BE) C) and D)
F) All of the above

Question 6

Technician A says that engine lube analyses can be performed in truck service facilities with the advantage of producing immediate results. Technician B says that spectrographic analysis of engine lube is usually performed in a laboratory . Who is correct?

Accepted Answer

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

Question 7

What should be used to check gear side clearance when overhauling an oil pump?

Accepted Answer

A)   dial indicator
B)   outside micrometer
C)   snap gauges
D)   thickness gaugesE) None of the above
F) B) and D)

Question 8

Which of the following diesel engine operating conditions is more likely to result in cold sludging?

Accepted Answer

A)   engine overspeed
B)   high temperature operation
C)   high load, lugdown
D)   low load, low temperature operationE) B) and D)
F) All of the above

Question 9

What type of engine oil pump is most commonly used on truck diesel engines?

Accepted Answer

A)   plunger
B)   vane
C)   external gear
D)   centrifugalE) B) and C)
F) A) and D)

Question 10

What is a common indicator that engine oil has become contaminated with diesel fuel?

Accepted Answer

A)   milky appearance
B)   sludging
C)   aceration
D)   blacker in colorE) None of the above
F) A) and D)

Question 11

A filter that operates by forcing all of the engine oil it receives through the filtering media is known as:

Accepted Answer

A)   positive
B)   centrifugal
C)   bypass
D)   cyclonicE) A) and B)
F) All of the above

Question 12

Which of the following diesel engine oil grades would function best in subarctic temperature conditions?

Accepted Answer

A)   10W
B)   0W-30
C)   10W-30
D)   15W-40E) A) and C)
F) B) and D) B

Question 13

When an oil sample analysis indicates elevated levels of silicon, which of the following should be inspected first?

Accepted Answer

A)   oil pump
B)   main bearings
C)   turbocharger
D)   low pressure intake circuit for leaksE) A) and C)
F) None of the above D

Question 14

Which of the following is an undesirable constituent of engine oil?

Accepted Answer

A)   film strength
B)   dispersants
C)   oxidation inhibitors
D)   ashE) All of the above
F) B) and C)

Question 15

What type of oil pressure sensor is most commonly used on current electronically managed diesel engines?

Accepted Answer

A)   bourdon gauge
B)   variable capacitance
C)   electrical
D)   thermistorE) A) and B)
F) A) and C) B

Question 16

In which of the following applications is the use of a synthetic engine oil especially recommended?

Accepted Answer

A)   exceeding the OEM service intervals
B)   extreme cold weather operation
C)   dynamometer operation
D)   stationary operationE) A) and D)
F) All of the above

Question 17

Which of the following values would be typical of engine oil at operating temperature?

Accepted Answer

A)   165 degrees Fahrenheit
B)   185 degrees Fahrenheit
C)   195 degrees Fahrenheit
D)   230 degrees FahrenheitE) None of the above
F) All of the above

Question 18

Technician A says that most engine OEMs recommend priming full flow oil filters following an oil change. Technician B says that failure to prime a full flow oil filter following engine lube service may damage the turbocharger when the engine is started. Who is correct?

Accepted Answer

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

Question 19

Which organization grades engine oils by viscosity?

Accepted Answer

A)   SAE
B)   API
C)   TMC
D)   ATAE) A) and C)
F) A) and B)

Question 20

Which type of oil cooler is said to possess the highest cooling efficiency in diesel engines?

Accepted Answer

A)   pancake type
B)   plate type
C)   radiator type
D)   bundle typeE) B) and C)
F) C) and D)

Exam 10: Engine Lubrication Systems

What type of filter is normally located in series immediately downstream from the oil pump?

Correct AnswerverifiedShow Answer

If a diesel engine is equipped with a diesel particulate filter (DPF) which of the following lube oil classifications is recommended?

Correct AnswerverifiedShow Answer

Which organization classifies all engine oils sold in North America?

Correct AnswerverifiedShow Answer

The temperature at which an engine oil begins to gel is known as:

Correct AnswerverifiedShow Answer

Technician A says that highway diesel engines equipped with DPF should use a lube oil formulated to meet the API CJ-4 classification or later. Technician B says that FA-4 oil is backward compatible with all previous generations of diesel engine lube oils. Who is correct?

Correct AnswerverifiedShow Answer

Technician A says that engine lube analyses can be performed in truck service facilities with the advantage of producing immediate results. Technician B says that spectrographic analysis of engine lube is usually performed in a laboratory . Who is correct?

Correct AnswerverifiedShow Answer

What should be used to check gear side clearance when overhauling an oil pump?

Correct AnswerverifiedShow Answer

Which of the following diesel engine operating conditions is more likely to result in cold sludging?

Correct AnswerverifiedShow Answer

What type of engine oil pump is most commonly used on truck diesel engines?

Correct AnswerverifiedShow Answer

What is a common indicator that engine oil has become contaminated with diesel fuel?

Correct AnswerverifiedShow Answer

A filter that operates by forcing all of the engine oil it receives through the filtering media is known as:

Correct AnswerverifiedShow Answer

Which of the following diesel engine oil grades would function best in subarctic temperature conditions?

Correct AnswerverifiedB

When an oil sample analysis indicates elevated levels of silicon, which of the following should be inspected first?

Correct AnswerverifiedD

Which of the following is an undesirable constituent of engine oil?

Correct AnswerverifiedShow Answer

What type of oil pressure sensor is most commonly used on current electronically managed diesel engines?

Correct AnswerverifiedB

In which of the following applications is the use of a synthetic engine oil especially recommended?

Correct AnswerverifiedShow Answer

Which of the following values would be typical of engine oil at operating temperature?

Correct AnswerverifiedShow Answer

Technician A says that most engine OEMs recommend priming full flow oil filters following an oil change. Technician B says that failure to prime a full flow oil filter following engine lube service may damage the turbocharger when the engine is started. Who is correct?

Correct AnswerverifiedShow Answer

Which organization grades engine oils by viscosity?

Correct AnswerverifiedShow Answer

Which type of oil cooler is said to possess the highest cooling efficiency in diesel engines?

Correct AnswerverifiedShow Answer

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B

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D

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B

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