Question 1

What are three bus architectures used in vehicle communication buses?

Accepted Answer

A)   Star, loop and hybrid.
B)   Networked, peer to peer and wireless.
C)   Wired, wireless and fiber optic.
D)   One wire, two wire and three wire.E) B) and C)
F) C) and D)

Question 2

Which of the following is NOT a function of the PCM?

Accepted Answer

A)   Broadcast two-way mobile vehicle communications (telematics) .
B)   Retain data in memory.
C)   Output command signals using drivers.
D)   Filter and prepare input signals.E) A) and B)
F) B) and D)

Question 3

What advantages do smart switches provide over electromechanical switches?

Accepted Answer

A)   Faster response.
B)   Significantly reduce the amount of wiring required.
C)   Significantly reduce the number of switches required.
D)   They do not require a power source.E) B) and C)
F) A) and B) B

Question 4

Vehicle PCM programming can be divided into what two categories?

Accepted Answer

A)   Chassis data and emissions data.
B)   Standard data and performance data.
C)   Customer data and proprietary data.
D)   Single wire data and two wire data.E) All of the above
F) A) and D)

Question 5

What are the three types of mass air flow sensors (MAF) ?

Accepted Answer

A)   Hall-effect, thermocouple and critical flow.
B)   Intake, exhaust and naturally aspirated.
C)   Hot wire, critical flow venturi and vortex flow.
D)   Electromechanical, resistive and piezo-resistive.E) B) and C)
F) None of the above C

Question 6

Which powertrain and emissions data bus is used on most post-2010 automotive chassis?

Accepted Answer

A)   OBD II
B)   UART
C)   LINs
D)   CAN-CE) All of the above
F) B) and C)

Question 7

Why are transistors used as output drivers on the PCM?

Accepted Answer

A)   It improves data bus speeds.
B)   To allow low voltage logic commands to switch higher voltage drivers such as those for fuel injectors.
C)   To switch the low voltage engine bus to the higher voltage chassis bus.
D)   For heat dissipation from the PCM.E) All of the above
F) B) and C)

Question 8

What do SAE J-standards dictate on chassis data buses?

Accepted Answer

A)   Which engines are compatible with which PCMs.
B)   Exhaust emission levels.
C)   Hardware and software rules for multiplexing data exchange between modules.
D)   Only electrical hardware standards for PCM systems.E) A) and B)
F) C) and D)

Question 9

What two types of temperature sensors are used in diesel particulate filters?

Accepted Answer

A)   Zirconium dioxide and platinum.
B)   Constantin and iron sensors.
C)   Oxygen sensors and particulate sensors.
D)   Pyrometers and resistance thermometers.E) A) and D)
F) None of the above

Question 10

Which of the following best describes the electronic engine control inputs on current engines?

Accepted Answer

A)   Data and sensor input.
B)   Sensor telemetry, data bus messages, and switch status inputs.
C)   Engine, chassis and emissions inputs.
D)   Digital and analog.E) A) and B)
F) B) and C)

Question 11

What is the generally favored term used to describe a light duty, electronic engine controller?

Accepted Answer

A)   Powertrain control module (PCM) .
B)   State of health (SOH) . controller
C)   Central processing unit (CPU) .
D)   The data module.E) A) and C)
F) B) and C)

Question 12

How are modules/controllers identified on a data bus?

Accepted Answer

A)   With pre-programmed electronic id tags.
B)   With a unique bus address.
C)   By the connectors bus address.
D)   Using dip switches set by the service technician.E) A) and D)
F) None of the above

Question 13

What are the three distinct stages of engine electronics information processing?

Accepted Answer

A)   Sensor input, data storage and driver output.
B)   Data gathering, data storage and data output.
C)   Sensor telemetry, bus multiplexing and output switching.
D)   Data input, data processing and output.E) B) and C)
F) None of the above

Question 14

Hall-effect throttle position sensors offer what advantage over potentiometer sensors?

Accepted Answer

A)   Better accuracy.
B)   Faster response to accelerator input.
C)   Better reliability and increased service life.
D)   Have less moving parts.E) A) and C)
F) All of the above C

Question 15

Technician A states the CPU is responsible for retaining processing cycle result data. Technician B states the PCM processing cycle is performed by the CPU. Who is correct?

Accepted Answer

A)   Technician A only.
B)   Technician B only.
C)   Both A and B.
D)   Neither A nor B.E) B) and C)
F) B) and D)

Question 16

The term handshake is used to verify what condition?

Accepted Answer

A)   Two way communications between the target module and an EST.
B)   Compatibility of different data bus standards.
C)   Error conditions put out by the CPU.
D)   That a module is maintaining a proper V-Ref level.E) A) and B)
F) C) and D)

Question 17

What type of sensors commonly use a reference voltage (V-Ref)  supplied by the PCM?

Accepted Answer

A)   Smart switches.
B)   All sensors use V-Ref.
C)   Temperature, pressure and Hall-effect position sensors.
D)   Airflow, position and temperature sensors.E) All of the above
F) A) and C)

Question 18

Which two pins are assigned for CAN-C bus access on a J1962 connector?

Accepted Answer

A)   pins 2 and 10.
B)   pins 5 and 16.
C)   pins 3 and 11.
D)   pins 6 and 14.E) All of the above
F) A) and B)

Question 19

Technician A states that Hall effect sensors can be used for shaft positional and speed reporting. Technician B states Hall effect sensors can be used for temperature signaling. Who is correct?

Accepted Answer

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

Question 20

Connecting to a chassis data bus is done through what connector on most current vehicles?

Accepted Answer

A)   UART serial connector.
B)   J1962 data-link connector.
C)   Class II OBD connectors.
D)   Data bus USB connectors.E) All of the above
F) A) and B)

Exam 12: Engine Electronics

What are three bus architectures used in vehicle communication buses?

Correct AnswerverifiedShow Answer

Which of the following is NOT a function of the PCM?

Correct AnswerverifiedShow Answer

What advantages do smart switches provide over electromechanical switches?

Correct AnswerverifiedB

Vehicle PCM programming can be divided into what two categories?

Correct AnswerverifiedShow Answer

What are the three types of mass air flow sensors (MAF) ?

Correct AnswerverifiedC

Which powertrain and emissions data bus is used on most post-2010 automotive chassis?

Correct AnswerverifiedShow Answer

Why are transistors used as output drivers on the PCM?

Correct AnswerverifiedShow Answer

What do SAE J-standards dictate on chassis data buses?

Correct AnswerverifiedShow Answer

What two types of temperature sensors are used in diesel particulate filters?

Correct AnswerverifiedShow Answer

Which of the following best describes the electronic engine control inputs on current engines?

Correct AnswerverifiedShow Answer

What is the generally favored term used to describe a light duty, electronic engine controller?

Correct AnswerverifiedShow Answer

How are modules/controllers identified on a data bus?

Correct AnswerverifiedShow Answer

What are the three distinct stages of engine electronics information processing?

Correct AnswerverifiedShow Answer

Hall-effect throttle position sensors offer what advantage over potentiometer sensors?

Correct AnswerverifiedC

Technician A states the CPU is responsible for retaining processing cycle result data. Technician B states the PCM processing cycle is performed by the CPU. Who is correct?

Correct AnswerverifiedShow Answer

The term handshake is used to verify what condition?

Correct AnswerverifiedShow Answer

What type of sensors commonly use a reference voltage (V-Ref) supplied by the PCM?

Correct AnswerverifiedShow Answer

Which two pins are assigned for CAN-C bus access on a J1962 connector?

Correct AnswerverifiedShow Answer

Technician A states that Hall effect sensors can be used for shaft positional and speed reporting. Technician B states Hall effect sensors can be used for temperature signaling. Who is correct?

Correct AnswerverifiedShow Answer

Connecting to a chassis data bus is done through what connector on most current vehicles?

Correct AnswerverifiedShow Answer

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B

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C

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C

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