[D2L] 102D Air Properties & Airflow Designs

Question 1

What is the purpose of air conditioning? (select ALL those that apply)

1) Air quality
2) human comfort
3) food services
4) chemical or manufacturing processes

Answer 1

1) Air quality
2) human comfort
3) food services
4) chemical or manufacturing processes

Question 2

What will the rate of evaporation be on a wet bulb thermometer if the dry bulb temperature is 80 F with a humidity of 85%?

Answer 2

Slow

Question 3

What are the units for enthalpy?

Answer 3

btu/lb

Question 4

If the dry bulb temperature is greater than the wet bulb temperature, the water vapour in the air will condense.

Answer 4

False

Question 5

What is the relative humidity that most people are comfortable at?

Answer 5

30%-60%

Question 6

How many grains of moisture are in one pound of water?

Answer 6

7000 grains

Question 7

What does VOC stand for?

Answer 7

Volatile Organic Compounds

Question 8

Oxygen makes up the majority of our air.

T or F

Answer 8

False

Question 9

Which of the following make up standard dry air? (MULTI-SELECT)

1) 68 degrees Fahrenheit
2) 14.7 psia
3) 0.075 cubic feet per pound
4) 0.075 pounds per cubic feet

Answer 9

68 degrees Fahrenheit
14.7 psia
0.075 pounds per cubic feet (ft³/lb)

Question 10

Which anemometer uses a propeller to detect airflow?

1) rotating vane type
2) stationary vane type
3) strobe-activated type
4) clamp-on type

Answer 10

rotating vane type

Question 11

The Pitot tube consists of 2 tubes, what do they calculate?

Answer 11

Total Pressure and Static Pressure