Title: Temperature Control Test
Course: Intro to Control Devices (IC 108-IC 108) > Section: Assessments

Q: A __________ is capable of accurately measuring temperatures from a distance.
- RTD
- thermistor
- thermocouple
- pyrometer
A: RTD

Q: A 10 degree Celsius reading is made. Convert this value to Fahrenheit.
- 75.6 degrees
- 50 degrees
- 37.5 degrees
- 23.3 degrees
A: 75.6 degrees

Q: A compressor in a refrigerator converts a freon gas into a liquid.
- True
- False
A: True

Q: A thermocouple produces a voltage that is proportional to the ____________.
- difference in temperature between the hot and cold junction
- temperature of the hot junction
- temperature of the cold junction
A: difference in temperature between the hot and cold junction

Q: A(n) ____________ has a positive temperature coefficient.
- thermistor
- RTD
- thermocouple
A: thermistor

Q: An 80 degree Fahrenheit reading is made. Convert this value to Celsius.
- 26.7 degrees
- 112 degrees
- 12.4 degrees
- 86.4 degrees
A: 26.7 degrees

Q: An arrangement of several thermocouples wired in series for the purpose of increasing sensitivity is referred to as a(n) __________.
- enhancer
- thermopile
- stack
- piggy back
A: enhancer

Q: An increased thermocouple output voltage can be obtained by wiring two or more thermocouples in parallel.
- True
- False
A: False

Q: How many BTUs are required to raise the temperature of one pound of water 100 degrees?
- 50
- 100
- 150
- 200
A: 50

Q: If the bridge in the following figure is balanced and the temperature to which it is exposed rises, will the voltmeter read a positive or negative voltage?
- positive
- negative
A: positive

Q: In thermocouple circuits, cold junction compensation is used to eliminate error due to the effects of ____________.
- hysteresis
- dead band
- ambient temperature
- open circuits
A: hysteresis

Q: The __________ junction of the thermocouple is considered the reference junction.
- cold
- hot
A: cold

Q: The basic laws of physics state that every object with a temperature above absolute zero radiates energy in the form of __________.
- photons
- protons
- electrons
- electromagnetic waves
- auras
A: photons

Q: The process by which thermal energy is transferred by a gas is called ____________.
- convection
- conductance
- radiation
A: convection

Q: The process by which thermal energy is transferred by a vacuum is called ______________.
- convection
- conductance
- radiation
A: convection

Q: The thermistor ____________ when the temperature to which it is exposed varies.
- resistance changes
- produces different voltages
A: resistance changes

Q: Thermistors react according to the principle of _____________ temperature coefficient.
- negative
- positive
A: negative

Q: Thermodynamics refers to energy movement from _________.
- hot to cold
- cold to hot
- both a and b
A: hot to cold

Q: When a bimetallic thermometer is exposed to heat, the strip will bend in the direction of the metal with the _________ expansion rate.
- lower
- higher
A: lower

Q: When the motor is initially started in the following figure, the winding in the inside branch of the parallel circuit is ___________.
- functional
- eliminated
A: functional