Question 1

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

Accepted Answer

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

Question 2

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

Accepted Answer

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

Question 3

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?

Accepted Answer

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

Question 4

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

Accepted Answer

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 
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 5

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?

Accepted Answer

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

Question 6

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?

Accepted Answer

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

Question 7

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?

Accepted Answer

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

Question 8

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?

Accepted Answer

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

Question 9

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?

Accepted Answer

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

Question 10

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

Accepted Answer

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 
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 11

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?

Accepted Answer

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

Question 12

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

Accepted Answer

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 
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 13

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

Accepted Answer

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

Question 14

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

Accepted Answer

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

Question 15

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

Accepted Answer

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 
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 16

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

Accepted Answer

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 
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 17

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

Accepted Answer

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

Question 18

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?

Accepted Answer

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

Question 19

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

Accepted Answer

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

Exam 14: Servicing and Maintenance

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

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

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

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?

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?

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?

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?

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?

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

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?

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

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

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

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

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

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

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?

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

Introduction

Hand and Shop Tools, Precision Tools, and Units of Measurement

Personal and Safety Awareness

Engine Basics

History of the Heat Engine

Power

Engine Powertrain Components

Engine Feedback Assembly

Engine Housing Components

Engine Lubrication Systems

Engine Cooling Systems

Engine Breathing

Engine Retarders

Engine Removal, Disassembly, Cleaning,

Diesel Engine Run- in and Performance Testing

Chemistry and Combustion

Diesel Fuel Characteristics

Fuel Subsystems

Fuel Injection Basics and Governor Principles

Injector Nozzles

Port-Helix Metering Injection Pumps

Inlet-Metering Rotary Distributor Pumps

Sleeve-Metering Rotary Distributor Pumps

Single-Actuator Eui Systems

Dual-Actuator Eui Systems

Heui Fuel Systems

Electronic Unit Pump Eup Systems

Cummins Hpi-Tp

Common Rail Systems

Amplified Common Rail Systems

Review of Electrical and Electronics Fundamentals

Vehicle Computer Systems

Ests and Siss

Electrical Wiring, Connector Terminal Repair

Multiplexing

The Connected Vehicle

Natural Gas, Propane, and Biodiesel Fuels

High Voltage Electricity

Hybrid and Hydrogen Fuel Cell Drivetrains

Electric Powertrains

Bosch Edc Systems

Caterpillar Engine Management Systems

Cummins Management Systems

Detroit Diesel Electronic Controls Ddec

Navistar Diamond Logic

Paccar Engine Management Systems

Volvo and Mack Engine Management

Emissions Management

Servicing Maintenance of Exhaust Aftertreatment Systems

Failure Analysis

Troubleshooting and Diagnostics

Filters