Deck 14: Servicing and Maintenance

Question 1

Identify the organization responsible for classifying all engine oils sold in North America:

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

Answer 1

API

Question 2

Identify the organization that sets the standards by which manufacturers grade engine oils by viscosity?

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

Answer 2

SAE

Question 3

What does the slang term wet service refer to in the context of a diesel engine?

A) engine pressure wash
B) pencil service
C) oil and filter change
D) engine overhaul

Answer 3

oil and filter change

Question 4

What is required to access the data bus and download data on a vehicle chassis?

A) ignition key
B) any computer
C) an electronic service tool (EST)
D) OEM permission

Question 5

Which of the following is good practice when breaking-in a new or reconditioned diesel engine?

A) use of a specialty break-in lube
B) idle engine for one hour after starting
C) light load operation for 1000 miles
D) load down the engine to seat rings

Question 6

Technician A says that however thoroughly a pre-delivery inspection (PDI) has been performed, there is always a chance that something has been missed. Technician B says that a post-break-in check up after a new or reconditioned engine has run its first 1,000 linehaul miles is recommended. Who is correct?

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

Question 7

What is the reason that accelerator pedal input may be disabled during cranking when temperatures drop below 32 degrees Fahrenheit (0 degrees Celsius)?

A) it freezes easily
B) electrical signals are inhibited
C) driver is not pushing hard enough
D) Electronic cold start strategy

Question 8

Technician A says that adding kerosene to diesel fuel will enable faster cold starts during winter conditions without damaging the engine. Technician B says that an APU can reduce overall cranking time in sub-zero weather. Who is correct?

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

Question 9

What should be done when a WIF alert illuminates while the engine is running?

A) shut down engine: drain water separator
B) shut down engine: drain fuel system
C) add a quart of methyl hydrate to the fuel tank
D) rev up engine rpm

Question 10

When a highway diesel engine DEF warning strategy defaults to trimback mode, what should be done?

A) regenerate the DPF
B) drive in a lower gear
C) replace the engine air filter
D) replenish the DEF tank

Question 11

What is the estimated safe shelf life for storing diesel fuel?

A) 1 month
B) 2 months
C) 6 months
D) 12 months

Question 12

When is an engine air filter said to function at its best efficiency?

A) brand new
B) mid-life
C) just before it fails
D) when exposed to hostile conditions

Question 13

When should the engine crankcase oil level be checked?

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

Question 14

When a diesel engine is operated exposed to dense grain chaff, which of the following devices can help extend air filter life?

A) lower restriction filter
B) higher restriction filter
C) air filter pre-cleaner
D) adding methyl hydrate to fuel tank

Question 15

What is another way of saying air filter restriction gauge?

A) precleaner
B) filter minder
C) WIF sensor
D) DEF alert

Question 16

What does the cross-hatched area marked between low and high levels on a commercial vehicle oil dipstick typically convert to in oil quantity?

A) 1 quart
B) 2 quarts
C) 4 quarts
D) 4 gallons

Question 17

Technician A says that some oil pan plugs on newer diesel engines only require a 1/4 turn to fully tighten. Technician B says that most oil pan sump plugs are removed and re-torqued using a 3/8-inch square socket drive. Who is correct?

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

Question 18

What is the recommended minimum amount of time to allow an oil pan to drain after removing the sump plug?

A) 5 minutes
B) 15 minutes
C) 30 minutes
D) one hour

Question 19

What is the main reason for the recommendation to thoroughly wash with soap and water after skin comes into contact with used engine oil?

A) it is a known carcinogen
B) it is unsightly to have dirty hands
C) it stains on contact
D) it produces an unpleasant odor

Question 20

Technician A says that some OEM dealerships recommend that oil samples be mailed in for laboratory testing. Technician B says that atomic emission spectrographic oil analysis can be performed in the service garage using Truck Check On-site analysis. Who is correct?

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

Question 21

Technician A says that a diesel engine that is operated continuously under light and idle loads, can be classified as severe service operation. Technician B says that a diesel engine hauling cargo in a routine linehaul operation can be classified as severe service operation. Who is correct?

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

Question 22

What is a synthetic oil likely to achieve when compared to a petroleum base diesel engine oil?

A) resistance to breakdown
B) better tolerance to extreme temperatures
C) extended service life
D) all of the above

Question 23

Technician A says that high detergent oils aerate more easily. Technician B says that high detergent oils should be used in engines equipped with a HEUI fuel system. Who is correct?

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

Question 24

When does an EG- to- water mix maximize its antifreeze protection?

A) 100% EG
B) 60:40 EG to water mix
C) 50:50 mix
D) 40:60 EG to water mix

Question 25

When does a PG mix maximize its antifreeze protection?

A) 100% PG
B) 60:40 PG to water mix
C) 50:50 mix
D) 40:60 PG to water mix

Question 26

Which type of diesel engine coolant is said to be able to last for the life of the engine?

A) EG
B) PG
C) ELC
D) WEC

Question 27

Technician A says that most OEMs recommend priming oil filters prior to installation. Technician B says that some current diesel engines incorporate an integral oil priming circuit. 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 must NOT be used?

A) FA-4
B) CK-4
C) CJ-4
D) GI-4

Question 29

Technician A says that filling an oil filter with clean engine oil prior to installation constitutes priming it. Technician B says when oil filters are installed dry on engines equipped with an oil priming circuit, it is good practice to seal the gasket with silicone. 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 the type of antifreeze can always be determined by its color. Technician B says that both PG and EG should be mixed with distilled water in order to maximize its service life. Who is correct?

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

Question 31

After opening a container of premix ELC, what is the maximum amount time it should be left before installing into a cooling system?

A) one hour
B) one week
C) one month
D) one year

Question 32

What is the recommended procedure when preparing an EG and distilled water coolant for installation into an engine?

A) pour distilled water in radiator first followed by EG concentrate
B) pour EG in radiator first followed by distilled water
C) alternate EG and distilled water into radiator one quart at a time
D) mix EG and distilled water outside the radiator: pour into radiator as a mixture

Question 33

Technician A says that diesel fuel can be safely pumped at rates of up to 20 gallons per minute at a refueling station. Technician B says that a portable diesel fuel container must be lined with zinc to prevent degradation. Who is correct?

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

Question 34

Technician A says that it is good practice to refuel a diesel fueled truck with the engine running in cold weather. Technician B says that some modern diesel fuel systems may be under moderate pressure so care must be taken when removing the fill cap. Who is correct?

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

Question 35

After servicing and priming a diesel engine fuel system, what is the maximum duration cranking time permitted before resting?

A) 30 seconds
B) 1 minute
C) 2 minutes
D) until the batteries die

Question 36

What is the maximum amount of time biodiesel should be retained in a diesel engine fuel tank?

A) one week
B) one month
C) 6 months
D) 1 year

Question 37

When draining collected water from the sump of a fuel/water separator, which of the following is recommended?

A) turn off the engine
B) completely drain the separator
C) recycle the drain-off into the fuel tank
D) drain the secondary filter

Question 38

What is the usual OEM recommendation when installing secondary fuel filters?

A) fill with clean diesel fuel
B) install dry, then prime the fuel system
C) install dry and use ether to start engine
D) install dry, then crank until the engine fires

Question 39

Technician A says that when a DPF is regenerated, any accumulated ash is burned off. Technician B says that when a DPF is regenerated, entrapped soot is burned off. Who is correct?

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