Exam 9: Computer Inputssensor Diagnostic Routines

A low voltage on the pressure sensor's supply circuit could be caused by any of the following except :

What type of temperature coefficient thermistors decrease their resistance as the temperature increases?

It is becoming more common for manufacturers to use a(n) ____ temperature sensor instead of in-vehicle temperature sensors.

Technician A says an accelerometer may be mass-type, roller-type, or solid-state. Technician B says when a photodiode is in the photo conductive mode, it is reverse biased when no light is applied. Who is correct?

Describe the operation of the magnetoresistive (MR) sensor.

A magnetic pulse generator uses electromagnetic induction to produce a voltage signal.

When inspecting magnetoresistive sensors, all of the following must be checked EXCEPT:

____ induction sensors use the principle of inducing a voltage into a winding by use of a moving magnetic field.

Linear or rotary movement can be measured by a potentiometer.

The pull-up resistor assures the proper high voltage reading by connecting the voltage sense circuit to an electrical potential that can be removed when the switch is closed.

A high voltage on the three-wire potentiometer sensor's signal circuit would most likely be caused by which of the following?

Which of the following would NOT be considered a computer input?

Which of the following is an example of a piezoelectric sensor?

Switches are computer output devices.

Magnetically coupled linear sensors used for fuel level sensing are being discussed. Technician A says a magnet is attached to the float arm and when the magnetic field passes the comb, the fingers are pulled against the resistor card contacting resistors that represent the various levels of fuel. Technician B says different contact sites on the strip produce different resistances that are used to determine the fuel level. Who is correct?

Technician A says the phototransistor uses the application of light to generate  carriers to supply the base leg current. Technician B says photoelectric sensors use light-sensitive elements to detect rotation. Who is correct?

Feedback signals are used to confirm position and operation of an actuator.

A piezoresistive sensor changes in ____ value as the pressure applied to the sensing material changes.

Technician A says a pressure switch is used to monitor precise pressures. Technician B says if voltage is not present to the oil pressure switch with the ignition in the RUN position, the warning lamp bulb may be burned out. Who is correct?

A thermistor is a solid-state ____ made from a semiconductor material that changes resistance as a function of temperature.