hw 6,11

Question 1

Piezoresistive sensors measure

Answer 1

Pressure and mechanical strain

Question 2

A low voltage signal from a zirconium O2 sensor indicates a

Answer 2

Lean air fuel ratio

Question 3

A zirconia O2 sensor may be used to monitor the

Answer 3

Air/fuel ratio, Both A and C

Question 4

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

Answer 4

All of the above

Question 5

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

Answer 5

All of the above

Question 6

A thermistor is a solid-state variable resistor made from a semiconductor material that changes resistance in relation to:

Answer 6

Temperature change

Question 7

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

Answer 7

Both A and B

Question 8

Magnetic pulse generators are commonly used to send data to the computer about the:

Answer 8

Speed of the monitored component

Question 9

An engine stalls during tight parking maneuvers. Which is the most likely cause?

Answer 9

Defective power steering switch

Question 10

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?

Answer 10

Technician B only

Question 11

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

Answer 11

Variable reluctance type sensors

Question 12

Excessive oxygen in the exhaust gas stream will cause a zirconia oxygen sensor to:

Answer 12

Stay below 450mv

Question 13

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?

Answer 13

Both A and B

Question 14

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

Answer 14

Both A and B

Question 15

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?

Answer 15

Technician A only

Question 16

Modules that are not part of any vehicle network are called:

Answer 16

Stand-alone modules

Question 17

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

Answer 17

Both A and B

Question 18

After 2008 the only communication standard that can be used is;

Answer 18

CAN

Question 19

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?

Answer 19

: Both A and B

Question 20

UART, J1850, KWP 2000 and ISO 9141 are:

Answer 20

Different computer networking languages