C1- Environmental Parameters Affecting Heat

Question 1

What are the 7 environmental parameters affecting heat?
1. A
2. M
3. R
4. A
5. A
6. D
7. W

Answer 1

1. Air temperature
2. Mean radiant temperature
3. Relative humidity
4. Air movement
5. Air velocity
6. Dry bulb temperature
7. Wet bulb temperature

Question 2

What is mean radiant temperature?

Answer 2

The average temperature of all surfaces surrounding a human body (or object).

Question 3

Air movement is important so that there is no _____________, reducing stuffiness.

Air velocity is important so that it increases the ________________, reducing damp.

Answer 3

stagnant air

rate of evaporation

Question 4

What is dry bulb temperature?
The temperature recorded by a _____ thermometer.

Answer 4

dry

Question 5

What is wet bulb temperature?
The temperature recorded by a thermometer with a ______________ wrapped around the _______.

Answer 5

damp cloth
bulb

Question 6

A wet bulb temperature measures the temperature felt by sweating skin. A damp cloth reduces the recorded temperature to match sweaty skin.

At a low humidity, evaporation is _______.
At a high humidity, evaporation is _______.

Answer 6

high
low

Question 7

What 2 factors can cause a high air velocity in a building?
1.
2.

Answer 7

1. Air conditioning
2. Unpleasant draft

Question 8

Explain 2 reasons why a retail store may feel cold?
1.
2.

Answer 8

1. Doors are left open, so draught may occur inside the store.
2. Structural heat loss due to thermal bridges inside the store.