#1
Which of the following is NOT a component of an HVAC control system?
Thermostat
Compressor
Humidistat
Damper
#2
What is the primary function of a thermostat in an HVAC system?
To control temperature
To filter air
To circulate refrigerant
To regulate humidity
#3
What does AHU stand for in HVAC?
Air Handling Unit
Air Heat Unit
Air Humidity Unit
Air Heating Unit
#4
Which of the following is a common communication protocol used in HVAC control systems?
#5
What is the role of a relay in HVAC control systems?
To measure temperature
To regulate airflow
To switch electrical circuits
To monitor humidity levels
#6
What is the purpose of a CO2 sensor in an HVAC system?
To measure air pressure
To detect gas leaks
To monitor indoor air quality
To regulate refrigerant flow
#7
Which type of control system adjusts output based on feedback from sensors?
On/Off control
Proportional control
Feedback control
Open-loop control
#8
In an HVAC system, what does VAV stand for?
Variable Air Volume
Ventilation Adjustment Valve
Volume Accumulation Valve
Variable Ambient Vent
#9
What is the purpose of a pressure transducer in an HVAC system?
To regulate airflow
To measure refrigerant temperature
To monitor duct pressure
To adjust humidity levels
#10
What is the function of an economizer in HVAC systems?
To reduce energy consumption
To increase indoor humidity
To control airflow direction
To adjust temperature setpoints
#11
Which of the following is an example of a pneumatic HVAC control system component?
#12
What does 'BMS' stand for in the context of building HVAC systems?
Building Management System
Basic Maintenance Schedule
Balanced Mechanical System
Binary Modulation Standard
#13
What is the purpose of a PID controller in HVAC systems?
To measure airflow
To control temperature, pressure, and flow
To adjust humidity levels
To monitor energy consumption
#14
What does 'DDC' stand for in the context of HVAC controls?
Direct Digital Control
Dynamic Dampening Control
Duct Diameter Calculator
Digital Display Console
#15
In HVAC terminology, what does 'DOAS' stand for?
Direct Outdoor Air System
Dynamic Operational Airflow System
Ducted Optimal Airflow System
Digital Operational Airflow Standard
#16
What is the purpose of an enthalpy wheel in an HVAC system?
To recover energy from exhaust air
To filter particulate matter
To adjust temperature setpoints
To control humidity levels
#17
In HVAC terminology, what does 'ASHRAE' stand for?
American Society of Heating, Refrigerating and Air-Conditioning Engineers
Advanced System for Heating and Refrigeration
Automated System for HVAC Regulation and Efficiency
Association of HVAC Professionals