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COSC 325 MEP I EXAM 1 Questions with Detailed
Verified Answers
What is the driving force for water vapor movement? Ans: ✓ ✓ ✓ Difference in vapor pressure
What is the elevation up to which very little error is introduced in the information gathered using a
psyhometric chart? Ans: ✓ ✓ ✓ 2000 ft
Which of the following can be used effectively for gathering data to produce sensible and ltent heat
changes in an air/water vapor mixture, in order to predict heating r cooling capacity? Ans: ✓ ✓ ✓
Psychometric chart
What is meant by specific volume of air? Ans: ✓ ✓ ✓ Number of cubic feet occupied by a pound of
air (ft^3/lb)
When does condensation occur on a building component's surface? Ans: ✓ ✓ ✓ When the surface
temperature is lower than the dew ppoint temperature of the ambient air/water vapor mixture
A large part of winter heating energy for a building is used to remove moisture from air Ans: ✓ ✓ ✓
False
What is meant by grain difference? Ans: ✓ ✓ ✓ Water vapor difference between outdoor and
indoor air in grains per pound of dry air
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What is the quantity of water that will consume or release 1 BTU of heat when heated up or cooled
down by 1 degree F? Ans: ✓ ✓ ✓ 1 pound of air
The values of at least ___ unrelated characteristics of an air-water vapor mixture ave to be known in
order to find the values of other characteristics, using a psychometric chart Ans: ✓ ✓ ✓ 2
The factors that contribute to both sensible and latent heat gains are ___ and outside air Ans: ✓ ✓
✓ people
The rate of air change per hour (ACH) in a building is .75 What does it mean? Ans: ✓ ✓ ✓ 75% of
air in the building is replaced every hour
Which one of the following could be a factor for infiltration of outside air into buildings Ans: ✓ ✓ ✓
temperature difference between inside and outside air
How would you calculate the U value of a construction made of composite materials? Ans: ✓ ✓ ✓
By adding the R values of all materials in a construction and finding the reciprocal of the sum
What is one of the functions of an enthalpy-controlled economizer? Ans: ✓ ✓ ✓ It evaluates both
outdoor dry-bulb temp and humidity
What index is used to measure the tendency of a material to oppose heat flow? Ans: ✓ ✓ ✓ R-
value
what is one of the important means of maintaining indoor air quality of a building? Ans: ✓ ✓ ✓ By
maintaining a continuous supply of fresh outdoor air
Internal loads play a significant role in heat gain by buildings, which of the following is not
considered as an internal load? Ans: ✓ ✓ ✓ indoor air
© Get it right 2025 Getaway - Stuvia US All rights reserved
COSC 325 MEP I EXAM 1 Questions with Detailed
Verified Answers
What is the driving force for water vapor movement? Ans: ✓ ✓ ✓ Difference in vapor pressure
What is the elevation up to which very little error is introduced in the information gathered using a
psyhometric chart? Ans: ✓ ✓ ✓ 2000 ft
Which of the following can be used effectively for gathering data to produce sensible and ltent heat
changes in an air/water vapor mixture, in order to predict heating r cooling capacity? Ans: ✓ ✓ ✓
Psychometric chart
What is meant by specific volume of air? Ans: ✓ ✓ ✓ Number of cubic feet occupied by a pound of
air (ft^3/lb)
When does condensation occur on a building component's surface? Ans: ✓ ✓ ✓ When the surface
temperature is lower than the dew ppoint temperature of the ambient air/water vapor mixture
A large part of winter heating energy for a building is used to remove moisture from air Ans: ✓ ✓ ✓
False
What is meant by grain difference? Ans: ✓ ✓ ✓ Water vapor difference between outdoor and
indoor air in grains per pound of dry air
© Get it right 2025 Getaway - Stuvia US All rights reserved
, Click here for more: Scholars nexus
What is the quantity of water that will consume or release 1 BTU of heat when heated up or cooled
down by 1 degree F? Ans: ✓ ✓ ✓ 1 pound of air
The values of at least ___ unrelated characteristics of an air-water vapor mixture ave to be known in
order to find the values of other characteristics, using a psychometric chart Ans: ✓ ✓ ✓ 2
The factors that contribute to both sensible and latent heat gains are ___ and outside air Ans: ✓ ✓
✓ people
The rate of air change per hour (ACH) in a building is .75 What does it mean? Ans: ✓ ✓ ✓ 75% of
air in the building is replaced every hour
Which one of the following could be a factor for infiltration of outside air into buildings Ans: ✓ ✓ ✓
temperature difference between inside and outside air
How would you calculate the U value of a construction made of composite materials? Ans: ✓ ✓ ✓
By adding the R values of all materials in a construction and finding the reciprocal of the sum
What is one of the functions of an enthalpy-controlled economizer? Ans: ✓ ✓ ✓ It evaluates both
outdoor dry-bulb temp and humidity
What index is used to measure the tendency of a material to oppose heat flow? Ans: ✓ ✓ ✓ R-
value
what is one of the important means of maintaining indoor air quality of a building? Ans: ✓ ✓ ✓ By
maintaining a continuous supply of fresh outdoor air
Internal loads play a significant role in heat gain by buildings, which of the following is not
considered as an internal load? Ans: ✓ ✓ ✓ indoor air
© Get it right 2025 Getaway - Stuvia US All rights reserved
