HVAC Residential vs Commercial HVAC 5

Question 1

ASHRAE Standard 90.1 applies primarily to:

Accepted Answer

Commercial buildings and high-rise residential energy efficiency

Answer

ASHRAE 90.1 sets minimum energy efficiency requirements for commercial buildings and serves as the basis for most commercial building energy codes.

Question 2

A supermarket HVAC system presents unique challenges compared to standard commercial HVAC primarily due to:

Accepted Answer

Open refrigerated cases that significantly increase the cooling and dehumidification load

Answer

Open refrigerated display cases release cold air and moisture into the store continuously, dramatically increasing the sensible and latent cooling loads.

Question 3

In commercial HVAC design, what is the purpose of a smoke control system?

Accepted Answer

To manage airflow during a fire to protect egress paths and aid firefighting

Answer

Smoke control systems use HVAC equipment to pressurize stairwells and create smoke-free evacuation paths during a building fire.

Question 4

Which of the following best describes a 'split-system' residential air conditioner?

Accepted Answer

A system with the condenser/compressor outside and the evaporator/air handler inside

Answer

A split system separates the condensing unit (outdoor) from the evaporator coil and air handler (indoor), connected by refrigerant lines.

Question 5

Compared to commercial systems, residential HVAC systems typically have:

Accepted Answer

Simpler on/off or two-stage controls with a single thermostat

Answer

Residential systems use simple thermostats with single-stage or two-stage control, whereas commercial systems use complex DDC sequences for multi-zone management.

HVAC - Heating, Ventilation, and Air Conditioning Practice Test

HVAC - Heating, Ventilation, and Air Conditioning Practice Test

HVAC Residential vs Commercial HVAC 5