#1
Which temperature scale is commonly used in HVAC/R systems?
Fahrenheit
Kelvin
Celsius
Rankine
#2
What is the typical range of temperatures encountered in HVAC/R applications?
0°C to 100°C
-20°F to 50°F
-40°C to 40°C
10°F to 90°F
#3
What is the primary function of a pyrometer in temperature measurement?
Measure surface temperature
Measure internal temperature
Measure atmospheric temperature
Measure humidity
#4
What is the purpose of a psychrometric chart in HVAC systems?
To measure pressure differentials
To assess airflow patterns
To analyze air humidity and temperature relationships
To calculate energy consumption
#5
What is the purpose of a capillary tube in a temperature control system?
To measure pressure
To regulate airflow
To control refrigerant flow
To generate electricity
#6
What is the purpose of a thermocouple in temperature measurement?
To measure pressure
To generate electricity
To measure humidity
To measure temperature
#7
Which type of temperature sensor relies on the expansion and contraction of materials?
Thermocouple
RTD (Resistance Temperature Detector)
Thermistor
Bimetallic strip
#8
Which gas is commonly used in refrigeration systems for temperature control?
Oxygen
Carbon dioxide
R-134a
Nitrogen
#9
What is the purpose of a thermistor in temperature measurement?
To measure pressure
To generate electricity
To measure humidity
To measure temperature
#10
Which material is commonly used in the construction of thermocouples?
Aluminum
Copper
Iron
Chromel and Alumel
#11
What does the term 'thermowell' refer to in temperature measurement?
A device to measure humidity
A protective covering for temperature sensors
A type of thermocouple
A method of measuring airflow
#12
In HVAC/R systems, what does PID control stand for?
Proportional, Integral, Derivative
Pressure, Impact, Duration
Power, Intensity, Duration
Pressure, Inlet, Duct
#13
What is the operating principle of an infrared thermometer used in HVAC/R?
Measuring electrical resistance
Detecting changes in capacitance
Measuring infrared radiation
Analyzing ultrasonic waves
#14
In HVAC/R, what does the term 'dry-bulb temperature' represent?
Temperature without considering humidity
Temperature with condensation
Temperature with high airflow
Temperature with wet conditions
#15
Which type of temperature sensor has a negative temperature coefficient (NTC)?
Thermocouple
RTD (Resistance Temperature Detector)
Thermistor
Bimetallic strip
#16
In HVAC/R, what is the significance of the dew point temperature?
It indicates the maximum temperature in a system
It indicates the temperature at which condensation begins
It measures the temperature at high altitudes
It measures the temperature of outgoing air
#17
What is the operating principle of a bimetallic thermometer?
Measuring electrical resistance
Detecting changes in capacitance
Measuring infrared radiation
Analyzing the differential expansion of two metals