Deck 16: Temperature Switches

Question 1

The amount of voltage produced by a thermocouple is generally in the order of megavolts.

Answer 1

False

Question 2

Thermistors are actually sensitive semiconductor devices.

A)thermally
B)voltage
C)contraction
D)pressure

Answer 2

A

Question 3

A bimetal strip is often formed into a spiral.

Answer 3

True

Question 4

The relay is so named because it uses a length of resistive wire connected in series with the motor to sense motor current.

A)serial thermostat
B)movable arm
C)solid-state starting
D)hot-wire starting

Question 5

A thermistor with a negative temperature coefficient will exhibit an increase of resistance with an increase in temperature.

Question 6

The bimetal strip is made by bonding two types of metal together.

A)similar
B)dissimilar
C)related
D)compatible

Question 7

One common method of sensing temperature is by the increase of pressure of some chemicals.

Question 8

Because of the thermistor's ability to change its resistance , they are commonly used as solid­state starting relays.

A)rapidly
B)negatively
C)slowly
D)in calibrated increments

Question 9

Electrical contacts must never be permitted to open or close slowly.

Question 10

Because the voltage of thermocouples is so low, they are often connected in series. This connection is referred to as a ____.

A)type J thermocouple
B)thermistor
C)thermopile
D)serial thermocouple