When cycled very quickly, digital signals can be used to create a(n) _______, similar to the variable control provided by an analog signal.

Select one:

• Orthogonal signal

• Variable resistance

• Varying output control signal

• Alternating wavelength

Tech A says that analog signals are continuously variable signals. Tech B says that digital signals are direct on/off signals with no in-between transition. Who is correct?

Select one:

• Tech A

• Tech B

• Both A and B

• Neither A nor B

About how much signal voltage is generated by a throttle position sensor at closed throttle?

Select one:

• 1 volt

• 10 volts

• 5 volts

• 2.5 volts

The rate at which these sound waves reach our ears is called ________.

Select one:

• Decibel

• Frequency

• Wavelength

• Pitch

Tech A says that potentiometer type sensors use a variable resistance to create a variable voltage signal that corresponds to a specific condition. Tech B says that oxygen sensors are the potentiometer type. Who is correct?

Select one:

• Tech A

• Tech B

• Both A and B

• Neither A nor B

In a vehicle, thermistors are used in various sensors related to:

Select one:

• pressure.

• temperature.

• voltage.

• speed.

Tech A says that the oxygen sensor is part of the feedback system for the engine management system. Tech B says that long-term fuel trims that are positive means that the PCM is leaning out the fuel mixture from the base pulse-width setting. Who is correct?

Select one:

• Tech A

• Tech B

• Both A and B

• Neither A nor B

Tech A says that in modern vehicles, an oxygen sensor is only positioned in the exhaust pipe after the catalytic converter. Tech B says that the oxygen sensor provides the electronic body control module (EBCM) with an electrical signal that relates to the amount of oxygen in the exhaust gas. Who is correct?

Select one:

• Tech A

• Tech B

• Both Techs A and B

• Neither Tech A nor B

Tech A states that the PCM also communicates with other electronic control modules on the vehicle. Tech B states that the PCM is a gateway node that is connected to each of the other networks. Who is correct?

Select one:

• Tech A

• Tech B

• Both A and B

• Neither A nor B

Which of the following is often used to control other actuators when the computer needs to control a high-current load?

Select one:

• Solenoids

• Thermistors

• Motors

• Relays