RESNET
QAD STUDY
fully
solved &
updated(la
test
,verified
version)
Name 4 transport mechanisms for water - answer Liquid
water moves by gravity or air pressure differences, liquid
water moves through capillary action through porous
building materials, water vapor is transported via air
movement, and water vapor diffuses through the building
assemblies.
What is the biggest cause of residential building failure? -
answer Moisture
What is the order of priority for the 4 water transport
mechanisms - answer Bulk water, capillary, infiltration,
diffusion.
Bulk Water - answer Liquid water that moves by the force
of gravity and flows downhill.
Capillary - answer Water movement through (wicking)
impermeable surfaces such as concrete, brick, mortar,
wood gypsum board, and fiberglass or cellulose insulation.
, What are the components of comfort? - answer
Temperature of the surrounding air, relative humidity,
airflow across the skin (evaporative rate), mean radiant
temperature.
What is the most common type of duct material installed
today? - answer Flex duct
What are the principals of good duct design? - answer Seal
with mastic, control the flow per room requirements,
smooth turns, support the ducts properly, no take-offs
within 1' of the plenum cap or trunk end, no take-offs
within 1' of each other, no take-offs from end of trunk.
(Install in conditioned space)
What is the code required label for mastic used on flex
duct? - answer UL 181
What are some of the challenges with an oversized air
conditioner? - answer Duct leakage increases, latent
cooling decreases, more electricity is used, system short
cycle, increased wear and tear on equipment from short
cycling. Possible moisture and condensation/mold issues.
What is the Sensible Heat Ratio? - answer is calculated by
dividing the sensible load in Btu's by the total cooling load
in Btu's
What techniques are often used to provide "cost-shifting"
to improve the financial feasibility of a project? - answer
QAD STUDY
fully
solved &
updated(la
test
,verified
version)
Name 4 transport mechanisms for water - answer Liquid
water moves by gravity or air pressure differences, liquid
water moves through capillary action through porous
building materials, water vapor is transported via air
movement, and water vapor diffuses through the building
assemblies.
What is the biggest cause of residential building failure? -
answer Moisture
What is the order of priority for the 4 water transport
mechanisms - answer Bulk water, capillary, infiltration,
diffusion.
Bulk Water - answer Liquid water that moves by the force
of gravity and flows downhill.
Capillary - answer Water movement through (wicking)
impermeable surfaces such as concrete, brick, mortar,
wood gypsum board, and fiberglass or cellulose insulation.
, What are the components of comfort? - answer
Temperature of the surrounding air, relative humidity,
airflow across the skin (evaporative rate), mean radiant
temperature.
What is the most common type of duct material installed
today? - answer Flex duct
What are the principals of good duct design? - answer Seal
with mastic, control the flow per room requirements,
smooth turns, support the ducts properly, no take-offs
within 1' of the plenum cap or trunk end, no take-offs
within 1' of each other, no take-offs from end of trunk.
(Install in conditioned space)
What is the code required label for mastic used on flex
duct? - answer UL 181
What are some of the challenges with an oversized air
conditioner? - answer Duct leakage increases, latent
cooling decreases, more electricity is used, system short
cycle, increased wear and tear on equipment from short
cycling. Possible moisture and condensation/mold issues.
What is the Sensible Heat Ratio? - answer is calculated by
dividing the sensible load in Btu's by the total cooling load
in Btu's
What techniques are often used to provide "cost-shifting"
to improve the financial feasibility of a project? - answer
