BOMI Air Handling, Water Treatment & Plumbing Systems Latest Update 2025-2026 600 Questions and 100% Verified Correct Answers Guaranteed A+
- - Absolute pressure is equal to standard sea-level plus: - CORRECT ANSWER:
Gauge pressure
- - All of the following are types of scale except: - CORRECT ANSWER: Silicone
Types of scale include:
- Silicate
- magnesium carbonate
- Calcium Carbonate
- - Complaints in the winter that it is too cold in a building can be offset by: - CORRECT
ANSWER: Raising the humidity and the temperature
- - Copper tubing is standardized on the basis of use into standard - CORRECT
ANSWER: Wall thickness schedules
- - Define absolute pressure - CORRECT ANSWER: The total pressure that is exerted
on a gas or liquid from all sources, including the atmospheric pressure.
Expressed in psia
Absolute pressure (psia) is equal to the sum of the atmospheric pressure and gauge pressure. 1 / 4
- - For a centrifugal fan, which type of fan blade affords a wider range of efficiencies
and lower noise levels? - CORRECT ANSWER: Airfoil
- - IAQ is best controlled by diluting polluted indoor air with less contaminated fresh air
in a process called: - CORRECT ANSWER: Ventilation
- - Name three advantages of the hydro-pneumatic tank system for water distribution -
CORRECT ANSWER: Can be installed in any convenient location in the water
distribution system.
May act as a cushion to prevent water hammer.
Energy conservation is possible.
1 - One method used to detect smoke is - CORRECT ANSWER: Ionization
- - Problems caused by the accumulation of dissolved minerals, suspended solids, and
rust partials aka sludge are called: - CORRECT ANSWER: Fouling
- - 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: - CORRECT
ANSWER: Occupants
1 - What are four basic groups of refrigerants? - CORRECT ANSWER: CFCs -
Chlorofluorocarbons
HCFCs - Hydrochlorofluorocarbons
HFCs - Hydrofluorocarbons 2 / 4
Ammonia
- - What are the three basic ingredients that must be present to permit combustion -
CORRECT ANSWER: Fuel
Oxygen
Heat
1 - What are the three main elements of good IAQ - CORRECT ANSWER: Acceptable
temperature and RH
Controlled airborne contaminants
Adequate distribution of ventilation air
1 - What are the various types of scale? - CORRECT ANSWER: Magnesium carbonates
Silicates
Calcium carbonates
- - What can be done in the winter to offset complaints of being too cold? - CORRECT
ANSWER: Raising the humidity and the temperature
- - What is a mixing box? - CORRECT ANSWER: The mixing box is the section of the
air handling unit 3 / 4
The mixing box is a section of the air- handling unit where return building air mixes with fresh outside air
- - What is the proper way to collect water samples for testing? - CORRECT ANSWER:
Containers must be cleaned and rinsed out with water from the line being tested.Let the line run for 30 seconds to prevent testing stagnant water, and run the test as soon as possible after the test has been taken.
- - What is the relationship between thermal comfort and metabolic heat? - CORRECT
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.
- - What material is a mixture of iron and iron silicate? - CORRECT ANSWER: Wrought
iron is a mixture of iron and iron silicate.
1 - When a substance condenses, it __Blank__ its surroundings - CORRECT ANSWER:
Releases heat to its surroundings
- - Which is the best description of back pressure? - CORRECT ANSWER: Increase in
pressure in the downstream piping system
- - Which is the simplest, but least accurate pH test? - CORRECT ANSWER: pH paper
- - Why does water have the ability to absorb large amounts of heat? - CORRECT
- / 4
ANSWER: The strong internal forces that must be overcome to break water molecules apart is the reason why water absorbs so many Btu of heat before changing from one state to another.