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Term 2: Ammonia > Indoor Air Quality: Exam 2 > Flashcards

Indoor Air Quality: Exam 2 Flashcards

1
Q

Definitions:

  1. Indoor air quality: The physical, chemical, and biological _____________ of indoor air
  2. Sick Building Syndrome: A condition in which occupants complain of a set of symptoms that cannot be related to a specific cause but are alleviated when the occupant leaves the building
A
  1. characteristics
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2
Q

Definitions:

  1. Building Related Illness: A specific illness with a known cause that is a result of exposure to an ____________
A

indoor agent

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3
Q

Definitions:

  1. Thermal Comfort: A state of mind in which a person feels __________ with the thermal environment includes temp, humidity, air movement and activity
  2. Ventilation Rate: The amount of outside air that is combined with _______ air that is supplied to the interior space.
A
  1. satisfaction

2. return

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4
Q

Sick Building Syndrome And Related Complaints: Factors and sources that affect IAQ:

  1. Temperature: 72 - 78F
  2. Humidity: 35% (winter) to 55% (summer) RH
  3. Carbon Dioxide: from fossil ____
  4. Carbon monoxide: tobacco smoke, ___ exhaust
  5. Formaldehyde: name a few
A
  1. fuels
  2. car exhaust
  3. particle board, glue, carpet
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5
Q

Sick Building Syndrome and Related Complaints: Factors and sources that affect air quality;

  1. Particulates such as: name a few;
  2. Volatile Organic Compounds (VOC’s): name a few;
A
  1. water residue, air inlets, carpets, duct insulation

2. copy machines, cleaning material, perfumes, hair sprays, solvents, computers

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6
Q

Sick Building Syndrome and Related Complaints: Factors and sources that affect indoor air quality;

  1. Microbial matter such as stagnant water in vac system;
    name a few locations where this water may be found.
A
  1. humidifiers, cooling towers, drain pans
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7
Q

General Indicators of Pollutant sources: TRUE OR FALSE

  • Overcrowding
  • Unsanitary conditions
  • Dust accumulation (housekeeping)
  • moisture problems (visible fungal growth)
  • Staining or discolouration of ceiling tile or walls
A

True

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8
Q

Airborne particles are extremely ______

A

small

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9
Q

A micron is 1/1000th of a _________

A

millimetre

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10
Q

The smallest particles seen by the naked eye; about __ microns

A

20

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11
Q

A typical human hair is about ___-100 microns

A

50

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12
Q

Classes of filters: Mechanical;

1.
2. dry ______

A
  1. Impingement

2. dry media

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13
Q

Classes of filters: Electronic;

  1. Air _______ or ______
A
  1. air washers or scrubbers
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14
Q

What is the third class of filter besides mechanical and electrical?

A

ultraviolet

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15
Q

Mechanical adsorption cleanable; material used is metal panels or fine _____ screens or a combo of both

A

fine mesh

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16
Q

Mechanical adsorption cleanable will have an adhesive coating which is often mineral oil thus the name _______

A

viscous

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17
Q

Dry media filters are class _ fire resistant, as the name suggests this type of filter lacks the tacky coating of ______ impingement filters

A

1

viscous

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18
Q

Name a few types of dry media filters;

  1. plain _____
  2. pleated _____ (increased surface area)
  3. ___ filter
  4. _______
A
  1. plain panel
  2. pleated panel
  3. bag filter
  4. cartridge
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19
Q

Dry media filters can be impregnated with activated carbon or zeolite for the removal of organic based odours such as; name 3

A
  1. cooking
  2. ozone
  3. cigarette smoke
  4. disinfectants
  5. mould or mildew
20
Q

Understanding MERV Ratings

  1. Merv ratings are used to rate the ability of an air conditioning filter to remove ____ from air as it passes through the filter.
  2. MERV is a standard used to measure the overall efficiency of a _______
  3. ______ MERV ratings mean fewer dust particles and other airborne contaminants that can pass through the filter
A
  1. dust
  2. filter
  3. higher
21
Q

MERV ratings range from 1-__ and measurements are in ______

A

1-16, microns

22
Q

TRUE OR FALSE

Some of the common particles related to MERV ratings are pet dander, insecticide dust, smog, dust, viruses, wood, tobacco, smoke, spore, bacteria, and pollen.

A

True

23
Q

MERV 5-__ rated filters are a better choice and are more commonly found in commercial applications. These filters will collect particles as small as 3 microns and are a good choice for home owners also.

A

5-8

24
Q

Filters with a MERV rating of 9-12 are used in __________ and ________ applications and will stop particles in the 1-3 micron range

A

commercial and industrial

25
Q

The most efficient filters have merv ratings of 13-16 and will stop particles as small as __ microns. These filters are used in hospitals and other super clean.

A

.3 microns

26
Q

Electronic filters are used in applications where very _____ air cleaning efficiency is required

A

high

27
Q

Electronic filters remove particles by __________ precipitation (which is the attraction of opposite charged particles)

A

electrostatic

28
Q

Warning: care must be taken when servicing electronic filters due to the very high _______

A

voltages

29
Q

Air washers: Types;

  1. Water _____
  2. Wet _______ coils

Note: these are highly effective for removing ______ particulates

A
  1. water sprays
  2. wet cooling coils

Note: These are highly effective for removing liquid particulates

30
Q

Ultra violet is the most effective for killing bacteria as well as _______

A

viruses

31
Q

HVAC Heating Systems: Hydronic distribution systems types;

  1. Air water systems; hot water or steam is supplied to a central air handler or individual fan ____ units
  2. All water systems; Hot water or steam is supplied to building convection _____
  3. Normal hot water or low pressure temperature range from _____ to 260F
A
  1. coil
  2. units
  3. 200-260F
32
Q

Low temperature water is normally operating at 30psi with a max temp of ___F

A

250F

33
Q

Medium temp water normally operates at 130psi and has a max temp of ___F

A

350F

34
Q

High temperature water normally operates at 300psi and has a max temp of ____F

A

450F

35
Q

Dual temperature water uses both ___ and ______ water

A

hot and chilled water

36
Q

Chilled water systems normal operating pressure is 125psi with a water temp of 40-___F

A

40-55F

37
Q

minimum percentage of outside air?

A

20%

38
Q

Humidity Control: Humidity levels of 35% to __%

A

35-55%

39
Q

Humidity note: True or False

  1. When levels vary above or below limits studies have shown that bacteria/viruses/fungi and other organisms become more active (humidity above recommended)
  2. Dry air tends to draw moisture out of carpets/furniture/woodwork/pants as well as increasing static electricity (humidity below recommended)
A

True

40
Q

Do you want higher or lower temperature in the summer? and why?

A

higher because the air will be more dry from air conditioning.

41
Q

Dehumidification: Methods;

  1. cooling ____
  2. cooling/_________
  3. ________ system
A
  1. cooling coil
  2. cooling/reheating
  3. desiccant system
42
Q

Humidification Methods; Evaporative type:

  1. Wetted ____
  2. Heated ____ (commercial applications)
A
  1. wetted drum

2. heated pan

43
Q

Humidification Methods: Atomizing type;

1. ______ (commercial applications)

A

spray

44
Q

Humidification Methods: Steam Type;

  1. ______ injection
A

steam injection

45
Q

Electric steam generation:

  1. Electric steam injection for ducted or non ducted systems. Uses electricity to generate ______
A

steam

Term 2: Ammonia (21 decks)

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