Chapter 9 Circuit Control Devices

A ______________ is a sensor in which resistance increases as the temperature increases.

• thermistor

• transistor

• photo-sensor

• pyro-sensor

A variable resistor constructed of a fixed input terminal and a variable output terminal, which vary current flow by passing current through a long resistive tightly coiled wire.

• potentiometer

• rheostat

• stepped resistor

• block resistor

A semiconductor-type of resistor in which resistance decreases as light intensity increases.

• thermistor

• rheostat

• photoresistor

• potentiometer

A situation in which a diode blocks current flow.

• reverse bias

• forward bias

• NPN semiconductor

• PNP semiconductor

A situation in which a diode conducts current.

• forward bias

• reverse bias

• NPN semiconductor

• PNP semiconductor

A variable resistor with three connections— one at each end of a resistive path, and a third sliding contact that moves along the resistive pathway

• rheostat

• potentiometer

• stepped resistor

• thermistor

A diode that produces light in different colors depending on the doping material used in its manufacture.

• IED

• EOD

• LED

• ZED

Upon a visual inspection of a relay, you can learn all the following EXCEPT?

• pin location

• pin number

• maximum amperage

• internal resistance

A starter uses a __________ to engage the drive.

• magnetic switch

• relay

• solenoid

• motor

The number of __________ determines how many terminals a simple switch has.

• throws

• poles

• volts

• amps