[L8]_Cooling Loads - Part II Flashcards
IND405
True/False: Lighting contributes to both immediate convective heat and delayed radiative heat gain in cooling loads.
[L8]
True
[L8]
IND405
Which of the following is used to calculate heat gain from lighting?
A. Wattage, usage factor, cooling load factor (CLF)
B. Total lumens and room area
C. Light source type and fixture count
D. Indoor air temperature and latent heat coefficient
[L8]
A. Wattage, usage factor, cooling load factor (CLF)
[L8]
IND405
True/False: If a cooking appliance is under an exhaust hood, the latent heat gain can be set to zero.
[L8]
True
[L8]
IND405
What is the sensible heat gain per person in an office setting according to ASHRAE?
A. 200 BTU/h
B. 250 BTU/h
C. 300 BTU/h
D. 350 BTU/h
[L8]
B. 250 BTU/h
[L8]
IND405
True/False: Plenum spaces are specifically conditioned to reduce heat transfer into the building’s HVAC system.
[L8]
False
[L8]
IND405
What percentage of heat gain is expected in insulated ductwork?
A. 10-15%
B. 1-3%
C. 5-8%
D. 20-25%
[L8]
B. 1-3%
[L8]
IND405
Match the type of duct leakage to its effect:
1. Outward Duct Leakage
2. Inward Duct Leakage
A. Causes temperature and humidity variations
B. Direct loss of cooling or heating capacity
[L8]
1 = B
2 = A
[L8]
IND405
True/False: In multizone systems, the block load is less than the sum of individual peak loads.
[L8]
True
[L8]
IND405
What is the primary reason for dividing a building into multiple thermal zones?
A. Reduce cooling equipment cost
B. Improve occupant thermal satisfaction
C. Simplify ductwork design
D. Increase system block load
[L8]
B. Improve occupant thermal satisfaction
[L8]
IND405
True/False: The worst-case cooling load scenario assumes all equipment is running, all lights are on, and the building is fully occupied.
[L8]
True
[L8]
IND405
What is a typical temperature gain for supply air ductwork routed outside on a summer day?
A. 1°F
B. 2°F
C. 5°F
D. 10°F
[L8]
B. 2°F
[L8]
IND405
Match the ASHRAE ventilation standard with the airflow calculation:
1. Office Space
2. Classroom (age 9+)
A. 5CFM/person + 0.06CFM/ft2
B. 10 CFM/person + 0.12 CFM/ft2
[L8]
1 = A
2 = B
[L8]
IND405
In multizone systems, equipment is sized to handle the (fill in the blank) load of the building.
[L8]
Block
[L8]
IND405
True/False: The Cooling Load Factor (CLF) for lighting is always 1.0 if the lights operate 24/7 or if cooling is turned off during weekends or nights.
[L8]
True
[L8]
IND405
Which of the following contributes the least to fan heat gain in an HVAC system?
A. Motor inefficiency
B. Ductwork friction
C. Blade inefficiency
D. Outdoor air humidity
[L8]
D. Outdoor air humidity
[L8]
