Deck 10: Engine Lubrication Systems

Question 1

Which organization classifies all engine oils sold in North America?

A) SAE
B) API
C) TMC
D) ATA

Answer 1

API

Question 2

Which organization grades engine oils by viscosity?

A) SAE
B) API
C) TMC
D) ATA

Answer 2

SAE

Question 3

What two principles of fluid friction are used by an engine lubricating system?

A) viscosity and viscosity index
B) flash point and pour point
C) thick film and boundary
D) detergents and dispersants

Answer 3

thick film and boundary

Question 4

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

A) milky appearance
B) sludging
C) aceration
D) blacker in color

Question 5

What is an indication that engine oil has become contaminated with engine coolant?

A) cloudy appearance
B) greenish color
C) reddish color
D) darker in color

Question 6

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

A) flash point
B) fire point
C) pour point
D) freeze point

Question 7

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

A) film strength
B) dispersants
C) oxidation inhibitors
D) ash

Question 8

What is the science of friction and lubrication known as?

A) physics
B) tribology
C) chemistry
D) engineering

Question 9

Which of the following properly defines viscosity?

A) resistance to sheer
B) resistance to flow
C) resistance to heat
D) resistance to solidification

Question 10

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

A) engine overspeed
B) high temperature operation
C) high load, lugdown
D) low load, low temperature operation

Question 11

What API oil classification is recommended for engines fueled by ultra low sulfur (ULS) fuel?

A) CJ-4
B) CK-4
C) FA-4
D) All of the above

Question 12

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

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

Question 13

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

A) exceeding the OEM service intervals
B) extreme cold weather operation
C) dynamometer operation
D) stationary operation

Question 14

When should a diesel engine crankcase oil level be checked to produce the most accurate reading?

A) engine running
B) immediately after shutdown
C) 10 minutes after shutdown
D) weekly

Question 15

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

A) plunger
B) vane
C) external gear
D) centrifugal

Question 16

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

A) dial indicator
B) outside micrometer
C) snap gauges
D) thickness gauges

Question 17

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

A) positive
B) centrifugal
C) bypass
D) cyclonic

Question 18

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

A) centrifugal
B) bypass
C) full flow
D) cyclonic

Question 19

Which of the following types of oil filter would normally have the highest filtration efficiency?

A) bypass
B) full f low
C) canister
D) spin-on

Question 20

What should be done to a bypass, luberfiner filter after changing the engine oil?

A) clean with solvent
B) clean with pressure washer
C) purge air on start-up
D) prime with used oil

Question 21

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

A) pancake type
B) plate type
C) radiator type
D) bundle type

Question 22

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

A) 165 degrees Fahrenheit
B) 185 degrees Fahrenheit
C) 195 degrees Fahrenheit
D) 230 degrees Fahrenheit

Question 23

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

A) bourdon gauge
B) variable capacitance
C) electrical
D) thermistor

Question 24

When an oil analysis profile taken on a high mileage engine indicates higher than normal levels of copper, which of the following components would more likely be at fault?

A) oil cooler
B) main bearings
C) valve seats
D) fire rings

Question 25

If a CJ-4 engine lubricating oil was used in place of an FA-4 oil, which of the following might result?

A) exhaust valve damage
B) turbocharger damage
C) exhaust gas recirculation (EGR) system damage
D) reduction in fuel efficiency

Question 26

In what year was API CK-4 lube oil introduced?

A) 2006
B) 2007
C) 2017
D) 2020

Question 27

Technician A says that CK-4 diesel engine lubricating oil is backward compatible with all previous diesel engine lube oil classifications. Technician B says that the digit 4, in FA-4 means that the oil is suitable for 4-stroke cycle use. Who is right?

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

Question 28

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

A) FA-4
B) CI-4
C) CF-4
D) GF-4

Question 29

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?

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

Question 30

Technician A says that since the introduction of EGR on diesel engines, OEMs have greatly extended recommended oil change intervals. Technician B says that Cummins and Detroit Diesel factory fill their engines with FA-4 engine oil . Who is correct?

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

Question 31

Which of the following methods would produce the most reliable results when drawing a sample for lube oil analysis?

A) oil change: beginning of sump drainage
B) oil change: midway through sump drainage
C) engine running: syringe at mid-sump level
D) engine off, engine hot: syringe at mid-sump level

Question 32

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?

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

Question 33

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

A) oil pump
B) main bearings
C) turbocharger
D) low pressure intake circuit for leaks

Question 34

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?

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