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BOMI; AIR HANDLING, WATER TREATMENT AND PLUMBING SYSTEMS EXAM QUESTIONS AND ANSWERS
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BOMI; AIR HANDLING, WATER TREATMENT AND PLUMBING SYSTEMS EXAM QUESTIONS AND ANSWERS...
[Meer zien]Voorbeeld 4 van de 65 pagina's
Voorbeeld 4 van de 65 pagina's
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Voorbeeld van de inhoud
BOMI - ANSWER Air Handling, Water Treatment & Plumbing SystemChapter 1 - ANSWER Human Comfort
Review Quiz 1 - ANSWER
1 - The rate of exchange of fresh air for returned air in an air conditioning
system is based on the time covered and the number of buildings: - ANSWER
Occupants
2 - Each of the 3 following are means of heat - ANSWER Radiation
Convection
Conduction
NOT Reduction
3 - What heat load source would be most likely to impact all zones of a
building? - ANSWER Lighting equipment
4 - To offset heat gain from office equipment in a new office building, air-
conditioning systems have been designed to offset how many watts per square
foot? - ANSWER 1 to 3 Watts per square foot.
,5 - The heat that has accumulated in a building from the previous day is called
the: - ANSWER Pull-down load
6 - What exists when the temperature and relative humidity of a person's
environment permit the person to lose metabolic heat at the same rate he or she
produces it? - ANSWER Thermal comfort
7 - Why is it most important to air-condition with sedentary people? -
ANSWER They think about their comfort more
8 - How is sensible heat measured? - ANSWER Dry-bulb thermometer
9 - What type of heat is transferred during the phase change from solid to liquid
or from liquid to gas? - ANSWER Latent heat
10 - Which of the following would enable the atmosphere to hold more water
vapour? - ANSWER Air temperature
11 - Which of the following is true about mechanical refrigeration cycle air
flows? - ANSWER Air flows from higher pressure to lower pressure
12 - Boyle's law states: - ANSWER As Pressure goes up, volume goes down.
13 - Maintaining temperature and ___Blank___ have a direct impact on
maintaining human comfort. - ANSWER Humidity
,14 - How does the introduction of air-conditioned filtered air at positive
pressure into a building contribute to building comfort? - ANSWER It
encourages outward air leakage, which then limits infiltration.
Chapter 1 Key Concept - ANSWER
1 - What is the relation between thermal comfort and metabolic heat? -
ANSWER Thermal comfort exists when the temperature and relative humidity
of a persons environment permit the person to lose, without conscious effort,
metabolic heat at the same rate he or she produces it.
2 - What level of occupant activity is selected for the design of an
airconditioning system? - ANSWER average and peak activity levels
3 - On what basis is the exchange rate of fresh air to replace return air in an air-
conditioning system based? - ANSWER The exchange rate of fresh air to
replace returned air is based upon the amount of fresh air required per building
occupants and time factor.
4- Define heat - ANSWER Heat is a form of energy which can't be destroyed
only transformed or moved.
Heat is added to conditioned air in the winter and removed in the summer. No
shit.
5 - What happens to the rate of heat transfer if the difference in temperature
increases? - ANSWER the rate of heat transfer Increases if the difference in
temperature increases
, 6 - What three ways heat is transferred? - ANSWER Convection
Conduction
Radiation
7 - Define conduction - ANSWER The direct transfer of heat from one body to
another.
Define connvection - ANSWER The transfer of heat using a substance
Define radiation - ANSWER Heat that an object throws off to its surroundings.
8 - Define sensible heat - ANSWER A measure of the internal heat of a
substance.
No change in state or physical property.
9 - Define latent heat - ANSWER The energy that is used or released during
the change in state.
10 - Define relative humidity - ANSWER The amount of water vapor held in
the air
11 - Is moist air more or less dense than dry air? - ANSWER Moist air has less
mass than dry air and is less dense than dry air.
12 - What is the atmospheric pressure of air at sea level? - ANSWER 14.7 psi
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