MECHANICAL AND ELECTRICAL SYSTEMS – HVAC & PLUMBING – EXAM 1 QUESTIONS AND
ANSWERS | EXAM PREP 2026/2027
Heat flows from _____ to the ____ condensing medium in an operating refrigeration system.
A. Air; water
B. Air; refrigerant vapor
C. Refrigerant Vapor; cold - ✔✔C. Refrigerant vapor; cold
Which of the following is not a key component of an air handling unit (AHU)?
A. Fan, Supply/Return/Outside air
B. Heating and Cooling coil
C. Refrigerant Compressor - ✔✔C. Refrigerant Compressor
Which of the following is NOT a key component of a fan coil unit?
A. Pump
B. Fan
C. Hating and cooling coil - ✔✔A. Pump
A fan coil unit normally does not have or handle which of the following?
A. Outside Air
B. Return Air
C. Supply Air - ✔✔A. Outside Air
Which of the following is not a key component of a packaged roof top unit (RTU)?
A. Fan, Supply/Return/Outside Air
B. Cooling Coil (Dx Coil)
, C. Pump - ✔✔C. Pump
Where are packaged RTU's generally used?
A. Hospitals and laboratories
B. Hotel Rooms
C. Small office buildings, Shopping centers - ✔✔C. Small office buildings, Shopping centers
Which of the following is a negative feature of PTAC units?
A. Physical dimension
B. Higher energy cost and noise
C. High first cost - ✔✔B. High energy cost and noise
Where are unit ventilators generally used?
A. School (K-12 classrooms)
B. Hotel Rooms
C. Small office Buildings, shopping centers, etc. - ✔✔A. School (K-12 classrooms)
How is the volume of supply & return air measured? Hint: "direct Measurement"
A. By measuring the size of ductwork
B. By measuring the Cubic feet (per) minute of air (CFM) supplied and returned
C. By measuring the difference between the return air temperature and indoor air temperature
- ✔✔B. By measuring the Cubic feet (per) minute of air (CFM) supplied and returned
What governs the quantity of outdoor air for ventillation?
A. Building codes and occupancy
B. Energy consumption
ANSWERS | EXAM PREP 2026/2027
Heat flows from _____ to the ____ condensing medium in an operating refrigeration system.
A. Air; water
B. Air; refrigerant vapor
C. Refrigerant Vapor; cold - ✔✔C. Refrigerant vapor; cold
Which of the following is not a key component of an air handling unit (AHU)?
A. Fan, Supply/Return/Outside air
B. Heating and Cooling coil
C. Refrigerant Compressor - ✔✔C. Refrigerant Compressor
Which of the following is NOT a key component of a fan coil unit?
A. Pump
B. Fan
C. Hating and cooling coil - ✔✔A. Pump
A fan coil unit normally does not have or handle which of the following?
A. Outside Air
B. Return Air
C. Supply Air - ✔✔A. Outside Air
Which of the following is not a key component of a packaged roof top unit (RTU)?
A. Fan, Supply/Return/Outside Air
B. Cooling Coil (Dx Coil)
, C. Pump - ✔✔C. Pump
Where are packaged RTU's generally used?
A. Hospitals and laboratories
B. Hotel Rooms
C. Small office buildings, Shopping centers - ✔✔C. Small office buildings, Shopping centers
Which of the following is a negative feature of PTAC units?
A. Physical dimension
B. Higher energy cost and noise
C. High first cost - ✔✔B. High energy cost and noise
Where are unit ventilators generally used?
A. School (K-12 classrooms)
B. Hotel Rooms
C. Small office Buildings, shopping centers, etc. - ✔✔A. School (K-12 classrooms)
How is the volume of supply & return air measured? Hint: "direct Measurement"
A. By measuring the size of ductwork
B. By measuring the Cubic feet (per) minute of air (CFM) supplied and returned
C. By measuring the difference between the return air temperature and indoor air temperature
- ✔✔B. By measuring the Cubic feet (per) minute of air (CFM) supplied and returned
What governs the quantity of outdoor air for ventillation?
A. Building codes and occupancy
B. Energy consumption
