Questions And Answers 100% Correct
what is the recommended domestic hot water temp at the fixture? - ANSWER-120
degrees F
what is the simple payback calculation given the following information?
material cost 100, labor cost 400, annual savings 125 - ANSWER-4 years
when a customer request that you do something that is prohibited by your company's
policies, what is the correct response? - ANSWER-inform the customer that your
company policy prohibits complying with their request.
upon entering a mechanical room the following conditions are observed:
full gas container and
soiled rags near the furnace
what is the appropriate next step? - ANSWER-make a recommendation to the
customer
what is required on the job site when latex caulk is present? - ANSWER-material safety
data sheet
workplace safety standards are set by which organization? - ANSWER-OSHA
what is sunlight through a window am example of? - ANSWER-radiation
what must be evaluated when air sealing has been completed? - ANSWER-the need for
mechanical ventilation
according to BPI national standards, what is the minimum requirement for installing
carbon monoxide detectors when a house has an attached garage? - ANSWER-at least
one installed per manufacturers instructions
what should be checked if a gas oven is found to be producing excessive CO? -
ANSWER-Burner alignment, primary air and gas pressure
what is the area of a window that is 36 inches wide and 48 inches tall? - ANSWER-12
square feet
, In the BPI national standards, what R- value is listed for 1" (inch) of fiber glass batt
insulation? - ANSWER-3.0
what is an acceptable strategy to reduce the risk of mold and mildew in a house? -
ANSWER-install local mechanical ventilation in bathrooms and kitchen.
what is a common cause of noise in ducts? - ANSWER-undersized ducts
which of the following is the most likely cause of overheating of one room of a home in
the summer? - ANSWER-large west facing window area
while in the attic, you observe a large hole and can see through it into the basement.
what action should you take? - ANSWER-air seal both the top and bottom
what is the proper method to determine envelope leakage of a duplex? - ANSWER-
conduct blower door tests simultaneously on both units and add the
CFM50's
what can pressure differential measurements between conditioned and unconditioned
spaces be used for? - ANSWER-Prioritize air sealing and insulation measures
what component of a wood framed, double pane window has the largest heat transfer? -
ANSWER-metal edge spacer
during a blower door test, install pressure readings are: house= -50 Pa Fan = -20 Pa
what is the next step? - ANSWER-install the low flow device provided with the blow door
what is air movement due to temperature gradients called? - ANSWER-convection
high relative humidity in a house may be caused by which of the following? - ANSWER-
high occupancy rates
which of the following products is the best option for air sealing most plumbing
penetrations? - ANSWER-aerosol spray foam
which treatment will constantly yield the largest envelope leakage reductions on a wide
range of housing stock? - ANSWER-caulking and weather stripping
what organization sets standards for safe chimney installations? - ANSWER-NFPA
(National Fire Protection Association)
according to BPI national standards what is the lowest ambient CO level that would
cause testing to be immediately aborted? - ANSWER-35 PPM
When determining a cost - effective improvement, what is the best ratio to consider? -
ANSWER-savings to investment