Unit 27 - Chapter 126

Question 0

The comfort of human beings is affective by the atmospheric conditions surrounding them. Which of the following affect comfort?

Answer 0

• temperature
• relative humidity
• air movement
• air cleanliness
  NOT saturation temperature

Question 1

Evaporative cooling is

Answer 1

Cooling and humidification of the air

Question 2

The body needs considerable time to adjust when moving from one space to another when temperature and humidity conditions vary widely. This may be described as

Answer 2

Shock effect

Question 3

Air for ventilation purposes in an office building should be kept within certain range of relative humidity

Answer 3

30 - 70%

Question 4

An increased air flow increases heat loss by

Answer 4

Convection
Conduction
Evaporation

Question 5

An average effective temperature chart can be applicable under the following conditions except when

Answer 5

Activity is high or heavy muscular work is being done

Question 6

A measure of comfort which involves the combined effects of the dry bulb temperature, relative humidity, and air movement is defined as

Answer 6

Effective temperature

Question 7

Which of the following statements about effective temperature is true?

Answer 7

For each combination air velocity remains constant

Question 8

The relative humidity should be maintained between

Answer 8

30% and 70% during summer and winter

Question 9

Effective temperature is defined as a measure of comfort which involves

Answer 9

• effect of relative humidity
• effects of air movement
• effects of dry bulb temperature
• effects of wet bulb temperature

Question 10

During the winter, most people feel comfortable when the effective temperature is between

Answer 10

17.2 and 21.7

Question 11

During the summer, most people feel comfortable when the effective temperature is between

Answer 11

19 and 24

Question 12

Which of the following properties cannot be found on the psychrometric chart?

Answer 12

Partial pressure