HVAC HVAC Load Calculations 2

Question 1

What does Manual S (ACCA) provide for HVAC technicians and designers?

Accepted Answer

Residential equipment selection based on Manual J loads

Answer

Duct sizing procedures

Answer

Ventilation rate requirements

Answer

Commercial load calculation methods

Question 2

Which of the following is an 'internal gain' source that adds to the cooling load in a building?

Accepted Answer

Occupants, lighting, and appliances

Answer

Exterior wall conduction

Answer

Outdoor air infiltration only

Answer

Ground-floor slab conduction

Question 3

Solar heat gain through windows is accounted for in a cooling load calculation using which factor?

Accepted Answer

Solar Heat Gain Coefficient (SHGC)

Answer

R-value

Answer

U-factor

Answer

Visible Transmittance (VT)

Question 4

In load calculations, 'infiltration' refers to:

Accepted Answer

Uncontrolled air leakage into the building through gaps and cracks

Answer

Purposeful outdoor air supplied by the ventilation system

Answer

Heat transfer through the foundation slab

Answer

Duct air leakage to unconditioned spaces

Question 5

What is the result of significantly oversizing an air conditioner based on load calculations?

Accepted Answer

Short cycling, poor humidity control, and increased wear

Answer

Better dehumidification and lower energy bills

Answer

Faster cool-down with no negative effects

Answer

Longer compressor life due to less run time

Question 6

Which ACCA manual is used for sizing and designing residential duct systems?

Accepted Answer

Manual D

Answer

Manual J

Answer

Manual S

Answer

Manual N