hw 6,11 Flashcards
Piezoresistive sensors measure
Pressure and mechanical strain
A low voltage signal from a zirconium O2 sensor indicates a
Lean air fuel ratio
A zirconia O2 sensor may be used to monitor the
Air/fuel ratio, Both A and C
When a computer has adaptive strategy, a short learning period will be necessary when:
a. The battery has been disconected
b.
A computer system component has been replaced or disconnected
c.
On a new vehicle
d.
All of the above
All of the above
A defective engine coolant temperature may causea.
Hard engine starting
b.
A lean air/fuel ratio
c.
A rich air/fuel ratio
d.
All of the above
All of the above
A thermistor is a solid-state variable resistor made from a semiconductor material that changes resistance in relation to:
Temperature change
The computer uses the TP sensor to monitor theSelect one:
a.
Position of the throttle plate
b.
Speed at which the throttle was opened
c.
Both A and B
d.
Neither A nor B
Both A and B
Magnetic pulse generators are commonly used to send data to the computer about the:
Speed of the monitored component
An engine stalls during tight parking maneuvers. Which is the most likely cause?
Defective power steering switch
Technician A says the PCM supplies power and ground to magnetic pulse generators. Technician B says the PCM supplies power and ground to Hall-effect sensors. Who is correct?
Technician B only
All of the following are types of mass air flow sensors except:Select one:
a.
Vane type sensors
b.
Heated grid type sensors
c.
Variable reluctance type sensors
d.
Hot wire type sensors
Variable reluctance type sensors
Excessive oxygen in the exhaust gas stream will cause a zirconia oxygen sensor to:
Stay below 450mv
Technician A says the computer may activate a circuit by completing the path to ground. Technician B says the computer may activate a circuit by completing the path to power. Who is correct?
Both A and B
Technician A says a quad driver has four independently controllable outputs. Technician B says some output driver modules may control up seven independent outputs. Who is correct
Both A and B
Technician A says CAN network modules can share information with other modules on the same bus. Technician B says the CAN class A bus is for high speed data. Who is correct?
Technician A only
Modules that are not part of any vehicle network are called:
Stand-alone modules
If a technician uses a scan tool to open the EGR valve while the engine is at idle:Select one:
a.
The engine will immediately idle rough
b.
The technician may be able to see the results of the command using the scan tool
c.
An EGR system DTC may set
d.
Both A and B
Both A and B
After 2008 the only communication standard that can be used is;
CAN
Technician A says pulse width modulation is the duration of on time, but not connected to a specific cycle time. Technician B says duty cycle is measured in percentages. Who is correct?
: Both A and B
UART, J1850, KWP 2000 and ISO 9141 are:
Different computer networking languages
