IICRC Commercial Drying Specialist (CDS) | Exam
questions with Corrected Answers
The weather impact factor considers the ______________________________________
as well as the ability of the building envelope
to_____________________________________ - ANSWER Impact the weather could
likely have on your drying environment, as well as
the ability of the building envelope to keep the outside air from influencing your
environment
Using the "Quick Guidelines for Cooling," how many tons of air conditioning would you
use to condition 75,000 square feet of a grocery store? - ANSWER 75000sf/ 350 = 215
tons
Direct expansion systems circulate refrigerant through a cold evaporator coil that cools
the airstream that is then ______________ - ANSWER Ducted into and distributed
throughout the building fan coil units located within the building
Chiller-water systems circulate conditioned water (chilled or heated) through the
system that isdistributed to ________________ - ANSWER
The temperature at which humidity in air reaches saturation (100% RH), below which
water vapor will condense from that air to form condensation on surfaces is called the
___________ - ANSWER Dew point
Convection, conduction and radiation are the three mechanisms of ________ - ANSWER
Vapor diffusion
,Enthalpy is a measure of the total energy in the air and is the total of the
____________energy and the ______________ energy - ANSWER Sensible
Latent
Humidity ratio, dew point and vapor pressure are all absolute ways of expressing the
moisture content of the air.
True or False? - ANSWER True
as the temperature of a material is increased, it's internal vapor pressure ________ -
ANSWER Increases
The 2nd law of thermodynamics states that energy flows only from being concentrated
in one place to becoming diffused or dispersed.
True or False? - ANSWER True
The two primary mechanisms by which moisture moves through materials
are_________________ and ____________________ - ANSWER Capillary action
Vapor diffusion
Water activity describes the amount of free water available to ______ - ANSWER
Support microbial growth at the surface of a material
The energy that is released or absorbed as a material goes through a phase change is
called_____________________energy - ANSWER Latent
, The energy that causes a temperature change in a material is called _______________
energy - ANSWER Sensible
"As built" drawings refer to - ANSWER Final drawings of actual construction
Rooms around which you are likely to find sound attenuated wall construction are -
ANSWER Conference rooms
Executive offices
Auditoriums
Between apartment or condos
Areas you are likely to find multiple layers of drywall are - ANSWER School hallways
Hospital hallways
Elevator shafts
Mechanical rooms
Why is it important to identify HVAC zones - ANSWER To prevent potential for cross
contamination and to help maintain the drying environment
Some HVAC systems use the area above a drop ceiling as the return air plenum -
ANSWER True
Loose fill insulation (perlite, vermiculite) can sometimes be present in - ANSWER
Concrete masonry unit (CMU) activities
Fire rated drywall has special additives to achieve the rating and is labeled as type
______ - ANSWER X
questions with Corrected Answers
The weather impact factor considers the ______________________________________
as well as the ability of the building envelope
to_____________________________________ - ANSWER Impact the weather could
likely have on your drying environment, as well as
the ability of the building envelope to keep the outside air from influencing your
environment
Using the "Quick Guidelines for Cooling," how many tons of air conditioning would you
use to condition 75,000 square feet of a grocery store? - ANSWER 75000sf/ 350 = 215
tons
Direct expansion systems circulate refrigerant through a cold evaporator coil that cools
the airstream that is then ______________ - ANSWER Ducted into and distributed
throughout the building fan coil units located within the building
Chiller-water systems circulate conditioned water (chilled or heated) through the
system that isdistributed to ________________ - ANSWER
The temperature at which humidity in air reaches saturation (100% RH), below which
water vapor will condense from that air to form condensation on surfaces is called the
___________ - ANSWER Dew point
Convection, conduction and radiation are the three mechanisms of ________ - ANSWER
Vapor diffusion
,Enthalpy is a measure of the total energy in the air and is the total of the
____________energy and the ______________ energy - ANSWER Sensible
Latent
Humidity ratio, dew point and vapor pressure are all absolute ways of expressing the
moisture content of the air.
True or False? - ANSWER True
as the temperature of a material is increased, it's internal vapor pressure ________ -
ANSWER Increases
The 2nd law of thermodynamics states that energy flows only from being concentrated
in one place to becoming diffused or dispersed.
True or False? - ANSWER True
The two primary mechanisms by which moisture moves through materials
are_________________ and ____________________ - ANSWER Capillary action
Vapor diffusion
Water activity describes the amount of free water available to ______ - ANSWER
Support microbial growth at the surface of a material
The energy that is released or absorbed as a material goes through a phase change is
called_____________________energy - ANSWER Latent
, The energy that causes a temperature change in a material is called _______________
energy - ANSWER Sensible
"As built" drawings refer to - ANSWER Final drawings of actual construction
Rooms around which you are likely to find sound attenuated wall construction are -
ANSWER Conference rooms
Executive offices
Auditoriums
Between apartment or condos
Areas you are likely to find multiple layers of drywall are - ANSWER School hallways
Hospital hallways
Elevator shafts
Mechanical rooms
Why is it important to identify HVAC zones - ANSWER To prevent potential for cross
contamination and to help maintain the drying environment
Some HVAC systems use the area above a drop ceiling as the return air plenum -
ANSWER True
Loose fill insulation (perlite, vermiculite) can sometimes be present in - ANSWER
Concrete masonry unit (CMU) activities
Fire rated drywall has special additives to achieve the rating and is labeled as type
______ - ANSWER X
