Question 1: Normally the air moves from areas of …………………. to ………………. With the available openings
- High pressure, Low pressure
- Low pressure, High pressure
- High temperature, Low temperature
- Low temperature, High temperature
HVAC
NEC 2023
HVAC Controls Practice Questions(sensor)-3
Take a Free Practice Test on HVAC Controls Practice Questions(sensor)-3
TOPICS COVERED
HVAC Practice tests
How this test works
Read each question carefully
Look for absolute words like always / never — they often distinguish the right answer.
Manage your time
You have 15 min for 10 questions. Skip tough ones and come back.
Progress is auto-saved
Your answers are saved locally — a page refresh won't lose your work.
Review your answers
After submitting you'll see every explanation and your NEC references.
Frequently Asked Questions
Yes — completely free with no signup required.
HVAC electrical exams cover electrical theory (Ohm's Law, circuits), transformers, single-phase and three-phase motors, control wiring, safety, and troubleshooting.
Requirements vary by state. HVAC technicians typically need EPA 608 certification and may need a separate electrical license for line voltage work.
10
Questions
15 min
Time
70%
Pass
Timer starts immediately. Progress is auto-saved.
0
Correct0
Wrong0s
TimeHVAC Controls Practice Questions(sensor)-3 — Question List
Question 2: Which is the simplest HVAC control?
- Cycling
- Modulating
Question 3: Which of the following are benefits of HVAC control system?
- Maintain thermal comfort conditions
- Monitoring the system performance
- Increases the efficiency of system
- All the options are correct
Question 4: In HVAC control system, the controller gets the signal from
- Sensor
- Controlled device
- Thermopile
- Fluid
Question 5: Which of the following sensor is used to provide two position (open or close) signals?
- Analog sensor
- Digital sensor
Question 6: Which of the following sensor works without contact with measuring quantity?
- RTD
- Ultrasonic
- Thermocouple
- Thermister
Question 7: Current sensors are used to measure ………….
- Temperature and pressure only
- Humidity and temperature and velocity
- Pressure and humidity
- Temperature, humidity and pressure
Question 8: What is the typical input voltage range to voltage sensor?
- 0 to 10 Vdc
- 4 to 20 Vdc
- 10 to 20 Vdc
- 0 to 50 Vdc
Question 9: Which of the following is not RTD?
- BALCO
- 10K themister
- Bimetallic
- Copper
Question 10: …………………………. assembly is called transmitter in control system.
- Sensor-transducer
- Sensor-controller
- Sensor-signal conditioner
- Sensor-controlled device
Student Reviews
No reviews yet — be the first to share your experience!
Leave a Review