Power Engineering 4B Book 10 HVAC Questions With
Complete Solutions
__________ dampers have the blades linked so the adjacent
blades rotate in opposite directions.
Select one:
a. Opposed blade
b. Fire
c. Bypass
d. Parallel blade Correct Answers a
_______________ dampers have the blades linked so the
adjacent blades rotate in opposite directions
a) Bypass
b) Parallel blade
c) Fire
d) Opposed blade Correct Answers d
) Leakage from supply air ducts, when the ductwork is installed
completely outside the conditioned space,
Select one:
a. Must be added to the return air duct leakage
b. Must be subtracted from the return air duct leakage
c. Adds load to the calculated latent heat load
d. Adds load to the calculated sensible heat requirements of the
conditioned space Correct Answers d
) Viscous impingement filters are highly efficient in the removal
of:
Select one:
,a. Cooking odours
b. Dust and pollen
c. Bacteria and spores
d. Fine dust, fumes, and smoke Correct Answers b
) Which of the following statements about duct leakage losses is
true?
Select one:
a. Air leakage varies from 40% to 45%.
b. Losses from bare supply air ducts within the conditioned
space have a substantial impact on loss calculations.
c. For insulated supply air ducts located within the conditioned
spaces, determination of air leakage is evaluated based on
judgment, depending on whether leaked air enters the
conditioned space, or is lost.
d. The effects of air leakage in supply air ducts are the same as
those in return ducts. Correct Answers c
A buried ventilation duct in an older building draws air from a
chemistry lab fume hood. The duct would likely be constructed
of
Select one:
a. Fiberglass
b. Cement asbestos
c. Aluminum sheet metal
d. Galvanized steel sheet metal Correct Answers b
Activated carbon will absorb odours and objectionable gases by
up to ________ of its own weight before requiring replacement
a) 0.1
, b) 0.2
c) 0.3
d) 0.5 Correct Answers b
Air conditioning ducts are classified as
a) Low pressure, medium pressure and high pressure
b) Fire resistant and flame-suppressing
c) Light, medium, and heavy gauge
d) Heating and cooling Correct Answers a
Air duct velocity is measured by connecting a
a) Manometer to the side of an air duct
b) Bourbon tube to the side of an air duct
c) Pressure gauge to the side of a duct, with a sensing tube
extending inside of the duct directed toward the airflow
d) Manometer to the side of a duct, with a sensing tube
extending inside of the duct directed toward the airflow Correct
Answers a
Air duct velocity pressure is measured by connecting a:
Select one:
a. Manometer to the side of a duct, with a sensing tube
extending inside of the duct directed toward the airflow
b. Pressure gauge to the side of a duct, with a sensing tube
extending inside of the duct directed toward the airflow
c. Bourdon tube to the air duct
d. Manometer to the side of an air duct Correct Answers a
Air washers can achieve dehumidification when
Complete Solutions
__________ dampers have the blades linked so the adjacent
blades rotate in opposite directions.
Select one:
a. Opposed blade
b. Fire
c. Bypass
d. Parallel blade Correct Answers a
_______________ dampers have the blades linked so the
adjacent blades rotate in opposite directions
a) Bypass
b) Parallel blade
c) Fire
d) Opposed blade Correct Answers d
) Leakage from supply air ducts, when the ductwork is installed
completely outside the conditioned space,
Select one:
a. Must be added to the return air duct leakage
b. Must be subtracted from the return air duct leakage
c. Adds load to the calculated latent heat load
d. Adds load to the calculated sensible heat requirements of the
conditioned space Correct Answers d
) Viscous impingement filters are highly efficient in the removal
of:
Select one:
,a. Cooking odours
b. Dust and pollen
c. Bacteria and spores
d. Fine dust, fumes, and smoke Correct Answers b
) Which of the following statements about duct leakage losses is
true?
Select one:
a. Air leakage varies from 40% to 45%.
b. Losses from bare supply air ducts within the conditioned
space have a substantial impact on loss calculations.
c. For insulated supply air ducts located within the conditioned
spaces, determination of air leakage is evaluated based on
judgment, depending on whether leaked air enters the
conditioned space, or is lost.
d. The effects of air leakage in supply air ducts are the same as
those in return ducts. Correct Answers c
A buried ventilation duct in an older building draws air from a
chemistry lab fume hood. The duct would likely be constructed
of
Select one:
a. Fiberglass
b. Cement asbestos
c. Aluminum sheet metal
d. Galvanized steel sheet metal Correct Answers b
Activated carbon will absorb odours and objectionable gases by
up to ________ of its own weight before requiring replacement
a) 0.1
, b) 0.2
c) 0.3
d) 0.5 Correct Answers b
Air conditioning ducts are classified as
a) Low pressure, medium pressure and high pressure
b) Fire resistant and flame-suppressing
c) Light, medium, and heavy gauge
d) Heating and cooling Correct Answers a
Air duct velocity is measured by connecting a
a) Manometer to the side of an air duct
b) Bourbon tube to the side of an air duct
c) Pressure gauge to the side of a duct, with a sensing tube
extending inside of the duct directed toward the airflow
d) Manometer to the side of a duct, with a sensing tube
extending inside of the duct directed toward the airflow Correct
Answers a
Air duct velocity pressure is measured by connecting a:
Select one:
a. Manometer to the side of a duct, with a sensing tube
extending inside of the duct directed toward the airflow
b. Pressure gauge to the side of a duct, with a sensing tube
extending inside of the duct directed toward the airflow
c. Bourdon tube to the air duct
d. Manometer to the side of an air duct Correct Answers a
Air washers can achieve dehumidification when
