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BEAP Training > Standard 62.1 > Flashcards

Standard 62.1 Flashcards

1
Q

What is the name of Standard 62.1

A

Ventilation for Acceptable Indoor Air Quality

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2
Q

Which buildings are excluded from Standard 62.1?

A

Single-family homes, multi family structures of 3 stories or fewer above grade, vehicles, aircrafts

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3
Q

Is thermal control included in Standard 62.1?

A

No

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4
Q

Define: ambient air

A

The air surrounding a building; the source of outdoor air brought into a building

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5
Q

Define: Air makeup

A

Combination of outdoor and transfer air intended to replace exhaust air and exfiltration

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6
Q

Define: transfer air

A

Air moved from one indoor space to another

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7
Q

Define: breathing zone

A

The region within an occupied space between planes 3 in - 72 in above the floor and more than 2 feet from the walls or fixed AC equipment

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8
Q

Define: Demand-controlled ventilation (DCV)

A

Any means by which the breathing zone of outdoor airflow (Vbz) can be varied to the occupied space(s) based on actual/estimated # of occupants and/or ventilation requirements

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9
Q

Define: energy recovery ventilation system

A

A device or combination of devices applied to provide the outdoor air for ventilation where energy is transferred between intake and exhaust airstreams

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10
Q

Define: Environmental tobacco smoke (ETS)

A

Second hand smoke

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11
Q

Define: exfiltration

A

Uncontrolled outward air leakage from conditioned spaces to unconditioned/unwanted spaced due to pressure differences, leaks, wind, etc.

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12
Q

Define: Stack effect

A

Inside-outside temperature differences causing colder air towards the bottom and and increasingly warm air above

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13
Q

Define: Infiltration

A

Uncontrolled inward air leakage to conditioned spaces through unintentional openings.

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14
Q

What are some examples of natural ventilation?

A

Thermal, wind, or diffusion effects through doors, windows, etc.

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15
Q

What are some exclusions to “net occupiable area”?

A

Shafts, column enclosures, and other permanently closed, inaccessible occupiable areas.

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16
Q

What does NAAQS stand for?

A

National Ambient Air Quality Standards

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17
Q

What source is needed to find out regional air quality?

A

US EPA

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18
Q

Define: Plenum system

A

A type of air-conditioning system in which air is passed into a room at a pressure greater than atmospheric pressure. Recirculates return air and distributes ventilation air.

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19
Q

What is the difference between a ducted return and a plenum return?

A

Ducted return is designed for air to flow back into the air handler while plenum return is not ducted back to the air handler, but goes freely into open plenum space.

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20
Q

FPM stands for…

A

Feet per minute (FPM) is the most common way to express air velocity

21
Q

Define Louver

A

The Louver is a kind of a shutter or blind that comes with horizontal slats that are angled to allow space for light and air but restrict rain and direct sunlight whereas dampers control the airflow. In HVAC systems, dampers and louvers are used to regulate the flow of air.

22
Q

Define: Bird Screen

A

Screen device should be designed to prevent penetration by 0.5 in diameter probe. This is to prevent bird nesting that may affect outdoor air intake

23
Q

Define: MERV value

A

Common term “minimum efficiency reporting value.” An air filter’s minimum efficiency reporting value (MERV) rating measures how effectively the filter stops dust and other contaminants from passing through the filter and into the air stream. Filters with higher MERV ratings trap small particles more effectively than filters with lower MERV ratings. In general, filters with a rating of MERV 16 or below are considered to be HVAC-system-grade filters for residential, commercial and general hospital use. MERV 17 through MERV 20 filters are typically used in surgical operating rooms, clean rooms and other contexts that require absolute cleanliness.

24
Q

Describe Particulate Matter Removal

A

Particulate matter filters or air cleaners having a minimum efficiency 8 shall be provided upstream of all cooling coils/wetted devices when air is traveling to an occupiable space

25
Q

Scroll down for MERV chart

A

https://www.grainger.com/know-how/equipment-information/kh-what-is-merv-rating-air-filter-rating-chart#:~:text=An%20air%20filter’s%20minimum%20efficiency,filters%20with%20lower%20MERV%20ratings.

26
Q

Regarding dehumidification systems: Occupied-space relative humidity shall be limited to __% or less

A

65%

27
Q

What is the required drain pan slope?

A

Min .125 in./ft. or otherwise designed to drain freely

28
Q

What is the purpose of the fins on finned tube coils?

A

The tubes are staggered and not in-line; while the fins are designed to help break up the airflow and not facilitate an easy, straight-through air path. Dirt and/or other particles in the air get caught easily, which again, is why coils can act as great filters

29
Q

Define: air washers

A

A type of water-spray system. They are a combination of humidifier and air purifier in one, creating an ideal indoor climate when the indoor air is dry and polluted. During humidification, pollutants are washed from the air and only clean, optimally humidified air is emitted back into the room at the same time.

30
Q

What is a direct evaporative cooler?

A

A type of water-spray system. Direct evaporative cooling systems put the process fluid, typically water, into direct contact with air. Water flows through fill as a fan draws air across it, facilitating the transfer of heat from the warm water to the cooler air.

31
Q

What is the purpose of turning vanes?

A

The primary purpose of turning vanes is to create a smoother change in direction for the airflow. The resulting reduction in pressure loss is a more efficient system.

32
Q

Define: volume damper

A

A damper in an HVAC system, also known as Duct Damper or Volume Balancing Damper is a movable plate, situated in the ductwork that regulates the flow of air and redirects it to specific places of a house. The usage of dampers is typically seen in zoning or zone control systems.

33
Q

What is direct evaporative cooling?

A

Direct evaporative cooling systems put the process fluid, typically water, into direct contact with air. Water flows through fill as a fan draws air across it, facilitating the transfer of heat from the warm water to the cooler air.

34
Q

What is the function of a plenum?

A

Plenum boxes are usually situated on either side of the fan or heat exchanger and have the important function of bringing in, distributing, and removing air. They are the air’s first stop after being heated or cooled and its last stop before going back into your AC, heat pump, or furnace.

35
Q

Explain building envelope

A

A building envelope is the physical separator between the conditioned and unconditioned environment of a building including the resistance to air, water, heat, light, and noise transfer.

36
Q

What are some of the ways a building envelope can be sealed?

A

exterior joints, seams, or penetrations in the building envelope that are pathways for air leakage shall be caulked, gasketed, weather-stripped, provided with continous air barrier, or otherwise sealed to limit infiltrations through the envelope.

37
Q

Explain subslab depressurizaition

A

The EPA defines sub-slab depressurization technology as “a system designed to achieve lower sub-slab air pressure relative to indoor air pressure by use of a fan-powered vent drawing air from beneath the slab.” Thus, even if there are holes, cracks, or other pathways between the commercial building and the subsurface, the vapors will flow downward, not upward. Therefore, a well-designed sub-slab depressurization system will most likely prevent any toxic vapors from intruding above into the building structure.

38
Q

Explain Air Classification 1

A

Class 1: Air flow with low contanimant concentration, low sensory-irritation intensity, inoffensive odor

39
Q

Explain Air Classification 2

A

Class 2: Air with moderate contaminent concentration, mild senosory irritation

40
Q

Explain Air Classification 3

A

Class 3: Air with significant contaminant concentration, sensory-irritation intensity, ofensive odor

41
Q

Explain Air Classification 4

A

Class 4: Air with highly objectionable fumes/gases or potentially dangerous particles, bioaerosols, or gases and concentrations high enough to be considered harmful

42
Q

Explain Redesignation in air transfer

A

A mixture of air that has been transferred through or returned from spaces or locations with different air classes shall be redesignated with the highest classification among clsses mixed. For example, mixed return air to a common system serving both class 1 space and class 2 space is designated as Class 2 air.

43
Q

Which classes of air can or cannot be recirculated?

A

Class 1 air can be circulated anywhere, Class 2 can be recirculated to Class 2 and higher air spaces, Class 3 and 4 are not permitted to be recirculated.

44
Q

How large must ETS signage be?

A

Letter must be least 1 in. high

45
Q

IAQ Procedure

A

IAQ Procedure shall be used to determine the additional outdoor air or air cleaning necessary to achieve the concentration limits of the contaminants of concern.

46
Q

What is IAQ?

A

Indoor Air Quality

47
Q

Explain Ventilation Rate Procedure

A

prescribes the quantity of outdoor air that must be delivered to each zone, based on the expected use of that zone, and then prescribes how to calculate the outdoor airflow needed at the system-level intake.
Vbz = (Rp · Pz) + (Ra · Az )

48
Q

Explain IAQ Procedure

A

IAQ Procedure is the same as the Ventilation Rate Procedure

49
Q

What must be implemented when a building is located in an area exceeding 10 micrometers (PM10)

A

…

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