BOMI: Air Handling, Water Treatment & Plumbing Systems Exam Study Guide.
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Course
BOMI
Institution
BOMI
BOMI: Air Handling, Water Treatment &
Plumbing Systems Exam Study Guide.
BOMI - AnswerAir Handling, Water Treatment & Plumbing System
Chapter 1 - AnswerHuman 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
per...
BOMI: Air Handling, Water Treatment &
Plumbing Systems Exam Study Guide.
BOMI - Answer✔Air Handling, Water Treatment & Plumbing System
Chapter 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
period of time covered and the number of building: - Answer✔Occupants
2 - All of the 3 following are methods of heat - Answer✔Radiation
Convection
Conduction
NOT Reduction
3 - Which heat load source is most likely to affect all zones of a building? - Answer✔Lighting
equipment
4 - To compensate for heat gain from office equipment in modern 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 leftover heat in a building from the day before is 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 released or used during a change of state between solid, liquid, and gas?
- Answer✔Latent heat
10 - Which of the following affects the amount of water vapor the atmosphere can hold? -
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 introducing air-conditioned and filtered air at a positive pressure into a building
help building comfort? - Answer✔It causes the outward escape of air, limiting infiltration.
Chapter 1 Key Concept - Answer✔
1 - What is the relationship 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 occupant activity level is chosen when engineers design an air-conditioning system? -
Answer✔average and peak activity levels
3 - What is the rate of exchange of fresh air for return air based on in an air-conditioning system?
- Answer✔The rate of exchange of fresh air for returned air is based on the quantity of fresh air
required for each building occupant over the course of time.
4- Define heat - Answer✔Heat is a form of energy which cannot 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 are three methods in which 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 - Does moist air have more or less density 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
13 - Explain Charles' law: - Answer✔Charles law explains why gases expand when heated and
contract when cooled.
14 - Explain Boyle's law - Answer✔Boyle's law states that a constant temperature, as the volume
increases, the pressure decreases.
15 - How does the human body regulate temperature? - Answer✔Sweating when overheating too
cool down.
16 - What system produces the most heat in a building? - Answer✔Zoning HVAC system?
Maybe look into this one.
17 - What are the four main categories of internal heat loads? - Answer✔People Heat Load
Lighting Heat Load
Equipment Heat Load
System Heat Load
18 - How have office building HVAC systems been designed to compensate for heat gain from
office equipment? - Answer✔Air conditioning systems have been designed to offset one to three
watts per square foot.
19 - What is pull-down load? - Answer✔Heat left over from the day before must be removed the
following morning when the air conditioning system is restarted.
20 - How can the problem of air and water vapor infiltration into a building be solved? -
Answer✔To reduce infiltration problems, ventilation air should be introduced through the air
conditioning system in constant quantities to maintain a slight positive pressure within the
building.
The pressure cases an outward escape of air through cracks, windows, and doors, limiting
infiltration.
Chapter 2 - Answer✔Air Properties and Heat Doctor
1 - Absolute pressure is equal to standard sea-level plus: - Answer✔Gauge pressure
2 - It is unusual for an air-conditioning system to exceed how many p.s.i.g or p.s.i.a? -
Answer✔0.5 psig
3 - The pressure of the air being pushed against the inside walls of a closed duct by a fan is
called: - Answer✔Static pressure
4 - The pressure that is created when air moved is called: - Answer✔Velocity pressure
5 - Velocity pressure is found by subtracting: - Answer✔Static pressure from total pressure
6 - A pressure drop is the difference in air pressure between where air enters a device and: -
Answer✔Where the air leaves the device
7 - When designing a duct system, it is important to remember that directional changes increase
friction and __Blank__ efficiency. - Answer✔Reduce
8 - The higher the airflow velocity in a duct work system is, the more __Blank__ will be
generated, and the power efficiency will increase. - Answer✔Noise
9 - Which material used to construct duct work is prohibited from use in hospitals and kitchens
by many local codes, and has been declared a possible carcinogenic to humans by the World
health Organization? - Answer✔Fibrous glass wool
10 - A draft exists when room air movement aka velocity is at or above how many fpm? -
Answer✔50 fpm
11 - Airflow in a duct system is regulated by air volume control devices called: -
Answer✔Dampers
12 - A silencer is a specially designed duct component that reduces noise made in the duct by: -
Answer✔Changing airflow characteristics
13 - Which type of building is the perimeter loop system ideal for? - Answer✔Single-story
buildings with concrete slab floors.
14 - All of the following factors that influence the amount of ventilating air required: -
Answer✔The number of people occupying the space
The activities performed in the space
The volume of the space
NOT The materials of the space
15 - What is a key aspect of a well-designed air-distribution service? - Answer✔Maintaining air
outlet noise below an objectionable level.
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