Question 1

Introduction of forced ventilation in the winter heating season helps to raise the humidity level.

Accepted Answer

A) True 
 B)False

Question 2

Comfort can be described as the gentle balance between ____.

Accepted Answer

A)   temperature, humidity, air movement, and air cleanliness
B)   air velocity, air cleanliness, humidity, and air movement
C)   air speed, air velocity, temperature, and humidity
D)   acceleration, air cleanliness, filtration, and humidityE) A) and B)
F) All of the above A

Question 3

How does air movement improve comfort?

Accepted Answer

Air movement increases the lat...

Question 4

The generalized comfort chart can be used as a basis to ____.

Accepted Answer

A)   determine combinations of temperature and humidity to produce comfort in summer and winter
B)   study air and its properties
C)   determine the amount of fresh air make up necessary for comfort
D)   None of the above.E) A) and D)
F) B) and D)

Question 5

The density of air is the ____.

Accepted Answer

A)   amount of moisture in the air
B)   amount of movement in the air per cubic foot
C)   weight of the air per cubic foot
D)   combination of the temperature and pressure of the airE) A) and D)
F) B) and D)

Question 6

If the dry-bulb temperature is 76°F and the wet-bulb temperature is 68°F, the wet-bulb depression is ____________________°F.

Accepted Answer

The answer of If the dry-bulb temperature is 76°F and...

Question 7

The moisture content in air (humidity) is measured by weight and expressed in pounds or ____________________.

Accepted Answer

The answer of The moisture content in air (humidity) is...

Question 8

A small amount of air is induced from the outside into the conditioner to keep the air from becoming ____.

Accepted Answer

A)   too humid
B)   superheated
C)   oxygen starved and stagnant
D)   too dryE) A) and B)
F) C) and D)

Question 9

If the wet-bulb and dry-bulb temperature are both 80°F, what is the humidity?

Accepted Answer

A)   0%.
B)   35%.
C)   70%.
D)   100%.E) B) and C)
F) C) and D) D

Question 10

Infiltration is the term used when referring to the air entering a structure ____.

Accepted Answer

A)   through an air make-up unit
B)   around doors and windows
C)   through ventilation
D)   because of street trafficE) All of the above
F) C) and D)

Question 11

The wet-bulb depression is ____.

Accepted Answer

A)   the difference between dry- and wet-bulb temperatures
B)   the same as the wet-bulb temperatures
C)   the same as the dry-bulb temperatures
D)   when the air is saturated with moistureE) A) and B)
F) All of the above

Question 12

The average core body temperature is ____________________°F.

Accepted Answer

The answer of The average core body temperature is ____________________°F....

Question 13

Why must the thermometers in a sling psychrometer be swung in order to obtain the readings?

Accepted Answer

To obtain the necess...

Question 14

The ____________________ of air is the measure of heat content in Btu per pound of air.

Accepted Answer

The answer of The ____________________ of air is the measure...

Question 15

The density of water is ____.

Accepted Answer

A)   61.3 lb/ft3
B)   62.0 lb/ft3
C)   62.4 lb/ft2
D)   62.4 lb/ft3E) A) and C)
F) B) and D) D

Question 16

The reading from a wet-bulb thermometer ____.

Accepted Answer

A)   is the same as the wet-bulb depression
B)   is the saturation pressure
C)   takes into account the moisture content of the air
D)   is always higher than the dry-bulb temperatureE) B) and C)
F) A) and D)

Question 17

How can the cost of heating a home in the winter be lowered, and still have comfortable conditions in the home?

Accepted Answer

Raising the humidity...

Question 18

When fresh air is introduced through the air handling system, the process is called fresh air intake, or ____________________.

Accepted Answer

The answer of When fresh air is introduced through the...

Question 19

The rate at which water will evaporate from the wick on the wet-bulb thermometer is determined by the moisture content of the surrounding air.

Accepted Answer

A) True 
 B)False

Question 20

What will happen if a technician uses a sling psychrometer that has a perfectly dry wick on the wet-bulb thermometer?

Accepted Answer

Both thermometers wi...

Exam 35: Comfort and Psychrometrics

Introduction of forced ventilation in the winter heating season helps to raise the humidity level.

Correct AnswerverifiedShow Answer

Comfort can be described as the gentle balance between ____.

Correct AnswerverifiedA

How does air movement improve comfort?

Correct AnswerverifiedAir movement increases the lat...View AnswerShow Answer

The generalized comfort chart can be used as a basis to ____.

Correct AnswerverifiedShow Answer

The density of air is the ____.

Correct AnswerverifiedShow Answer

If the dry-bulb temperature is 76°F and the wet-bulb temperature is 68°F, the wet-bulb depression is ____________________°F.

Correct AnswerverifiedShow Answer

The moisture content in air (humidity) is measured by weight and expressed in pounds or ____________________.

Correct AnswerverifiedShow Answer

A small amount of air is induced from the outside into the conditioner to keep the air from becoming ____.

Correct AnswerverifiedShow Answer

If the wet-bulb and dry-bulb temperature are both 80°F, what is the humidity?

Correct AnswerverifiedD

Infiltration is the term used when referring to the air entering a structure ____.

Correct AnswerverifiedShow Answer

The wet-bulb depression is ____.

Correct AnswerverifiedShow Answer

The average core body temperature is ____________________°F.

Correct AnswerverifiedShow Answer

Why must the thermometers in a sling psychrometer be swung in order to obtain the readings?

Correct AnswerverifiedTo obtain the necess...View AnswerShow Answer

The ____________________ of air is the measure of heat content in Btu per pound of air.

Correct AnswerverifiedShow Answer

The density of water is ____.

Correct AnswerverifiedD

The reading from a wet-bulb thermometer ____.

Correct AnswerverifiedShow Answer

How can the cost of heating a home in the winter be lowered, and still have comfortable conditions in the home?

Correct AnswerverifiedRaising the humidity...View AnswerShow Answer

When fresh air is introduced through the air handling system, the process is called fresh air intake, or ____________________.

Correct AnswerverifiedShow Answer

The rate at which water will evaporate from the wick on the wet-bulb thermometer is determined by the moisture content of the surrounding air.

Correct AnswerverifiedShow Answer

What will happen if a technician uses a sling psychrometer that has a perfectly dry wick on the wet-bulb thermometer?

Correct AnswerverifiedBoth thermometers wi...View AnswerShow Answer

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Air movement increases the lat...
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To obtain the necess...
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D

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Raising the humidity...
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Both thermometers wi...
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