71-19) What is the viral disease that certain mice can carry?
71-20) Why is it necessary for a HVACR technician to understand the building systems?
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UNIT 72 REVIEW QUESTIONS ANSWER KEY GO BACK TO INDEX
72-1) Why are heat load calculations necessary?
72-2) What is the difference between a shell load study room by room load study?
72-3) What advantage is there to doing a room by room load study over a shell load
study?
72-4) Why does oversized equipment operate inefficiently?
72-5) What is the difference between heat loss and heat gain?
72-6) What is the difference between sensible heat gain and latent heat gain?
72-7) What is the R value of a material with a thermal conductivity of 2.0 and is 4 inches
thick?
72-8) How is a U factor calculated for a building panel built of several different
materials?
72-9) What is the U value for a wall with the following construction:
Exterior siding R-0.75
72-10) How is an HTM calculated?
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72-11) What would the HTM be for a building panel with a U value of 0.8 and a
temperature difference of 40°F?
72-12) What is meant by the temperature daily range?
72-13) What effect does the daily range have on heat gain?
72-14) Why is the cooling temperature difference often different than the difference
between the indoor and outdoor temperatures?
72-15) How are the outside design conditions chosen?
72-16) List some of the differences between residential and commercial load
calculations.
72-17) What is Manual J?
72-18) Using the table in Figure 72-20, determine the heat gain HTM for a ceiling with
the following specifications:
72-19) What is the heat gain HTM for a concrete slab on grade floor?
72-20) Calculate the heat loss for a concrete slab on grade floor for a room with the
following specifications:
10 foot by 15 foot bed room on corner of house