HERS QUESTIONS AND ANSWERS | 154 QUESTIONS
AND ANSWERS | WITH COMPLETE SOLUTION!!
A basement has exposed stud walls and concrete floor and is indirectly
conditioned; all walls are insulated with paperless fiberglass batts. Would the
floor area be counted as CFA in REMrate Answer - No
- Not finished, indirectly conditioned
- Conditioned basement means there is supply air
An attic has sprayed foam along the roofline. Would the attic volume be
counted as conditioned volume in rem rate? Answer - Yes
An attic has sprayed foam along the roofline. Would the attic floor be counted
as CFA in rem rate? Answer - No
On a two story house, would the "band" volume be counted as infiltration
volume in REMrate Answer - Yes
What info will an NFRC label contain? Answer - SHGC, U factor, visible light
transmittance
When solar radiation strikes an untreated single pane glazing at 90 degree
angle, most of it is: Answer - Transmitted
,Does a radiant barrier receive any credit in the REMrate software? Answer -
Yes
Which of the following is correct regarding skylights when entering into
remrate Answer - Skylights are similar entries to windows except their area is
subtracted from a ceiling and not a wall and the pitch is needed
Thermal Bridge Answer - A thermal bridge, also called a cold bridge, heat
bridge, or thermal bypass, is an area or component of an object which has
higher thermal conductivity than the surrounding materials, creating a path of
least resistance for heat transfer.
Which of the following has no impact on the effectiveness of installed loose fill
atic insulation Answer - Temp difference between conditioned and
unconditioned space
U(avg) = Answer - U1A1+U2A2+.../total sq. footage
HDD is used to: Answer - calc. amount of energy required to heat a house over
a heating season
Which of the following conservation measures will have the greatest impact on
reducing the heating load on the house Answer - Going from no insulation to
some insulation
How should batt insulation be installed in the framed floor under a conditioned
space Answer - In contact with the bottom of the subfloor
When determining the dimensions of a window for the rating you should
measure the Answer - Area of window plus flashing
,When indicating window dimensions on a sketch, what must you record?
Answer - Dimensions to include frame (A22)
In an architectural drawing, the front of the house faces southwest. Which
direction does the right side face? Answer - Southeast
In summer cooling season what is overall effect on HVAC system of a large
return leak in an unconditioned attic Answer - System decreases efficiency
Which of the following describes. The portion of a homes cooling load caused
by water vapor that must be removed by air conditioner? Answer - Latent
Under summer design conditions in Houston, TX air leakage through building
envelope has what effect on cooling load? Answer - Adds sensible and latent
loads
What is the delivered efficiency of a heating system that has efficiency of .80
and distribution efficiency of .88 Answer - .70
Which of the following units is commonly used to meter residential natural gas
consumption? Answer - CCF - 100 cubic feet
*Actually charged by the Therm*
Which rating is typically used to express the efficiency of a central AC system?
Answer - SEER
1 Therm of natural gas equals approximately how many cubic feet of natural
gas? Answer - 100
, For about the same light output (lumens) a 60W incandescent light bulb would
likely be replaced by a CFL using approximately __ W? Answer - 15 Watts
*Incandescent/4=CFC*
*Incandescent/6=LED*
What organization rates new wood stoves for their efficiency? Answer - EPA
A house is very tight and ductwork is installed in an unconditioned ended attic.
What house pressure would you expect when the air handler has more supply
leakage than return leakage? Answer - Negative
*Supply leaks suck*
Which of the following is the most accurate way to measure the tightness of a
duct? Answer - Duct Pressurization Test
What is the standard pressure at which duct leakage test are conducted?
Answer - 25 Pa
In a tight house with dominant return leaks connected to the ouse, what will
be the effects on the house when the system is operating? Answer - The house
is pressurized
If the duct blower was connected to the return, what would be the effect of
incorrectly placing the duct pressure probe into the return grill instead of the
supply plant or supply grill? Answer - Duct leakage could be underestimated
You're measuring the pressure right at the blower
AND ANSWERS | WITH COMPLETE SOLUTION!!
A basement has exposed stud walls and concrete floor and is indirectly
conditioned; all walls are insulated with paperless fiberglass batts. Would the
floor area be counted as CFA in REMrate Answer - No
- Not finished, indirectly conditioned
- Conditioned basement means there is supply air
An attic has sprayed foam along the roofline. Would the attic volume be
counted as conditioned volume in rem rate? Answer - Yes
An attic has sprayed foam along the roofline. Would the attic floor be counted
as CFA in rem rate? Answer - No
On a two story house, would the "band" volume be counted as infiltration
volume in REMrate Answer - Yes
What info will an NFRC label contain? Answer - SHGC, U factor, visible light
transmittance
When solar radiation strikes an untreated single pane glazing at 90 degree
angle, most of it is: Answer - Transmitted
,Does a radiant barrier receive any credit in the REMrate software? Answer -
Yes
Which of the following is correct regarding skylights when entering into
remrate Answer - Skylights are similar entries to windows except their area is
subtracted from a ceiling and not a wall and the pitch is needed
Thermal Bridge Answer - A thermal bridge, also called a cold bridge, heat
bridge, or thermal bypass, is an area or component of an object which has
higher thermal conductivity than the surrounding materials, creating a path of
least resistance for heat transfer.
Which of the following has no impact on the effectiveness of installed loose fill
atic insulation Answer - Temp difference between conditioned and
unconditioned space
U(avg) = Answer - U1A1+U2A2+.../total sq. footage
HDD is used to: Answer - calc. amount of energy required to heat a house over
a heating season
Which of the following conservation measures will have the greatest impact on
reducing the heating load on the house Answer - Going from no insulation to
some insulation
How should batt insulation be installed in the framed floor under a conditioned
space Answer - In contact with the bottom of the subfloor
When determining the dimensions of a window for the rating you should
measure the Answer - Area of window plus flashing
,When indicating window dimensions on a sketch, what must you record?
Answer - Dimensions to include frame (A22)
In an architectural drawing, the front of the house faces southwest. Which
direction does the right side face? Answer - Southeast
In summer cooling season what is overall effect on HVAC system of a large
return leak in an unconditioned attic Answer - System decreases efficiency
Which of the following describes. The portion of a homes cooling load caused
by water vapor that must be removed by air conditioner? Answer - Latent
Under summer design conditions in Houston, TX air leakage through building
envelope has what effect on cooling load? Answer - Adds sensible and latent
loads
What is the delivered efficiency of a heating system that has efficiency of .80
and distribution efficiency of .88 Answer - .70
Which of the following units is commonly used to meter residential natural gas
consumption? Answer - CCF - 100 cubic feet
*Actually charged by the Therm*
Which rating is typically used to express the efficiency of a central AC system?
Answer - SEER
1 Therm of natural gas equals approximately how many cubic feet of natural
gas? Answer - 100
, For about the same light output (lumens) a 60W incandescent light bulb would
likely be replaced by a CFL using approximately __ W? Answer - 15 Watts
*Incandescent/4=CFC*
*Incandescent/6=LED*
What organization rates new wood stoves for their efficiency? Answer - EPA
A house is very tight and ductwork is installed in an unconditioned ended attic.
What house pressure would you expect when the air handler has more supply
leakage than return leakage? Answer - Negative
*Supply leaks suck*
Which of the following is the most accurate way to measure the tightness of a
duct? Answer - Duct Pressurization Test
What is the standard pressure at which duct leakage test are conducted?
Answer - 25 Pa
In a tight house with dominant return leaks connected to the ouse, what will
be the effects on the house when the system is operating? Answer - The house
is pressurized
If the duct blower was connected to the return, what would be the effect of
incorrectly placing the duct pressure probe into the return grill instead of the
supply plant or supply grill? Answer - Duct leakage could be underestimated
You're measuring the pressure right at the blower
