QUIZ 3: VEHICLE COMPUTER
SYSTEMS QUESTIONS AND
ANSWERS
An engine management system that has adapted existing hydromechanical fueling device
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s for control by computer is known as - ans-Partial authority
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Technician A says that a WIF sensor uses a couple of probes that measure the dielectric pr
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operties of water versus that of fuel. Technician B says that dielectric properties refers to el
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ectrical resistivity - ans-Both A and B
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Technician A says that multiple sensors such as those for temperature and pressures may
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be incorporated into what appears to be a single device. Technician B says that chassis bo
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dy controllers such as SAMs must be capable of communicating with the powertrain bus in
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current truck chassis - ans-Both A and B
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What electrical principle is used by a non-contact type of throttle position sensor (TPS)? -
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ans-Hall-effect
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What happens to resistance in an NTC thermistor when temperature increases - ans-
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Decreases
What is a stepper motor used for - ans-Precision positioning of a shaft
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What is the usual V-Ref value in diesel engine management systems - ans-5 V-DC
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What type of device is used as a coolant temperature sensor on a typical truck engine man
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agement system - ans-NTC thermistor sd sd sdsd sd
What type of output does an induction pulse generator (used to read shaft or rotor speed) p
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roduce - ans-AC sd sdsd
When memory in a vehicle ECM is described as being volatile, what happens to it when the
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ignition is turned off - ans-It is lost
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When processing the signal from an inductive pulse generator used to measure shaft rotati
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onal speed, which of the following is used to process the signal to an rpm value - ans-
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Frequency
SYSTEMS QUESTIONS AND
ANSWERS
An engine management system that has adapted existing hydromechanical fueling device
sd sd sd sd sd sd sd sd sd sd
s for control by computer is known as - ans-Partial authority
sd sd sd sd sd sd sd sd sdsd sd
Technician A says that a WIF sensor uses a couple of probes that measure the dielectric pr
sd sd sd sd sd sd sd sd sd sd sd sd sd sd sd sd
operties of water versus that of fuel. Technician B says that dielectric properties refers to el
sd sd sd sd sd sd sd sd sd sd sd sd sd sd sd
ectrical resistivity - ans-Both A and B
sd sd sdsd sd sd sd
Technician A says that multiple sensors such as those for temperature and pressures may
sd sd sd sd sd sd sd sd sd sd sd sd sd sd
be incorporated into what appears to be a single device. Technician B says that chassis bo
sd sd sd sd sd sd sd sd sd sd sd sd sd sd sd
dy controllers such as SAMs must be capable of communicating with the powertrain bus in
sd sd sd sd sd sd sd sd sd sd sd sd sd sd sd
current truck chassis - ans-Both A and B
sd sd sd sdsd sd sd sd
What electrical principle is used by a non-contact type of throttle position sensor (TPS)? -
sd sd sd sd sd sd sd sd sd sd sd sd sd sd
ans-Hall-effect
sdsd
What happens to resistance in an NTC thermistor when temperature increases - ans-
sd sd sd sd sd sd sd sd sd sd sd sdsd
Decreases
What is a stepper motor used for - ans-Precision positioning of a shaft
sd sd sd sd sd sd sd sdsd sd sd sd sd
What is the usual V-Ref value in diesel engine management systems - ans-5 V-DC
sd sd sd sd sd sd sd sd sd sd sd sdsd sd
What type of device is used as a coolant temperature sensor on a typical truck engine man
sd sd sd sd sd sd sd sd sd sd sd sd sd sd sd sd
agement system - ans-NTC thermistor sd sd sdsd sd
What type of output does an induction pulse generator (used to read shaft or rotor speed) p
sd sd sd sd sd sd sd sd sd sd sd sd sd sd sd sd
roduce - ans-AC sd sdsd
When memory in a vehicle ECM is described as being volatile, what happens to it when the
sd sd sd sd sd sd sd sd sd sd sd sd sd sd sd sd sd
ignition is turned off - ans-It is lost
sd sd sd sd sdsd sd sd
When processing the signal from an inductive pulse generator used to measure shaft rotati
sd sd sd sd sd sd sd sd sd sd sd sd sd
onal speed, which of the following is used to process the signal to an rpm value - ans-
sd sd sd sd sd sd sd sd sd sd sd sd sd sd sd sd sdsd
Frequency
