Human Body And Thermal Comfort Quiz

________ is a subjective state of satisfaction that varies with the individual and a number of circumstantial factors. 

The human being is a ________ that burns food as fuel and generates heat as a byproduct. Exhaling warm moist air from the lungs loses some heat, but most of the body’s flow is through the skin.

The ________ regulates the heat flow by controlling the amount of blood flowing through it.

The primary way that the human body gains heat is through ________

Heat is transported around the body by the________.

For the proper functioning of the organs of the body, and particularly for that of the brain, the temperature of the internal organs must be maintained constant, at around ________°C.

If it rises above ________ °C or falls below ________°C, death is imminent.

The controlling mechanism for this is the ________

If Brain temperature falls outside these very close limits, the body will react physiologically to restore heat balance.

• A.

  True

• B.

  False

To create thermal comfort, we must understand not only the heat Dissipation mechanisms of the human body but also the four environmental conditions that allow the heat to be lost:

• A.

  Humidity

• B.

  Metabolic rate

• C.

  Air Velocity

• D.

  Clothing

• E.

  State of health

• F.

  Mean radiant temperature (MRT)

• G.

  Acclimatization

• H.

  Air temperature

The ________ is the heat transfer of heated or cooled mass (the trasfer of of heat between a surface and moving fluid (air or liquid). = ________ by movement of molecules from one region of fluid to another region 

The ________ will determine the rate at which heat is lost to the air.

Internal Comfort temp: ________ - ________ ˚C

Humidity: ________

Air movement affects the heat-loss rate by both and

• A.

  Convection

• B.

  Evaporation

• C.

  Velocity

• D.

  Comfort wind

________ is simply the area-weighted mean temperature of all the objects surrounding the body.is simply the area-weighted mean temperature of all the objects surrounding the body. 

________ is a unit of measurement used to define power  ( power = energy consumed over a period of time)

Comfort wind less than ________ %. Example: ________c with ________% humidity is acceptable and ________% wind.

The ________ chart is a powerful tool for understanding how the combination of temperature and humidity affect comfort.

One measure of the effect of moisture in an air-vapor mixture is ________. It is measured using a thermometer with a wetted bulb moving rapidly through the air in order to promote evaporation.

________is noted as the difference in the temperatures between the wet wick thermometer and the DBT.

________ is an expression of the moisture content of a given atmosphere as a percentage of the saturation humidity at the same temperature:

________ is the vapor content of air, given in grams of water vapour per kg of air, i.e. g/kg. Air at a given temperature and pressure can support only a certain amount of moisture and no more.

The DBT corresponding to this point is referred to as the ________ of the original atmosphere. If there is further cooling, the status point will move along the saturation line and condensation will occur.

________ (reciprocal of density, in m3/kg) of the air-vapour mixture is indicated by another set of slightly more sloping lines on the psychrometric chart.