HVAC HVAC Load Calculations

Question 1

Which industry standard manual is most widely used in the US for residential HVAC load calculations?

Accepted Answer

Manual J

Answer

Manual D

Answer

Manual N

Answer

Manual S

Question 2

What does 'sensible heat' refer to in HVAC load calculations?

Accepted Answer

Heat that causes a change in temperature without a change in state

Answer

Heat associated with moisture in the air

Answer

Latent heat stored in refrigerant

Answer

Heat generated by occupants

Question 3

In a Manual J calculation, what is the term for the maximum heat gain a building experiences, which determines the required cooling capacity?

Accepted Answer

Peak cooling load

Answer

Design heating load

Answer

Infiltration load

Answer

Ventilation load

Question 4

Which factor accounts for heat transfer through walls, roofs, windows, and floors in a load calculation?

Accepted Answer

Conduction (envelope) load

Answer

Infiltration load

Answer

Internal gain load

Answer

Latent load

Question 5

What is the design temperature difference (ΔT) based on in a Manual J load calculation?

Accepted Answer

Outdoor design temperatures from ACCA or ASHRAE data minus indoor setpoint

Answer

The homeowner's comfort preference

Answer

Average annual temperatures for the region

Answer

The equipment's rated operating range

Question 6

Latent heat load in HVAC calculations is primarily associated with:

Accepted Answer

Moisture removal (dehumidification) from the conditioned space

Answer

Sunlight coming through windows

Answer

Heat conducted through the roof

Answer

Duct heat gain