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3rd year, First Semester > Building Utilities 2: Midterms Reviewer part 1 > Flashcards

Building Utilities 2: Midterms Reviewer part 1 Flashcards

1
Q

What are the three methods of heat transfer

A

Radiation, convection and conduction

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2
Q

heat travels as waves through space in the same manner that light travels

A

Radiation

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3
Q

It is when heat travels through liquids or gases

A

Convection

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4
Q

It is when heat moves through a solid material;
The denser the material, the better is will transfer heat

A

Conduction

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5
Q

The difference between the amount of heat on the inside of a building compared to the outside is known as?

A

heat loss or heat gain

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6
Q

It is defined as the heat lost through openings in a building

A

Infiltration

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7
Q

It is the ability of a material or component to resist heat transfer

A

Resistivity

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8
Q

It is needed to determine the
effectiveness of building materials and components in transmitting or
blocking the transmission of heat

A

Measurement standard for heat levels

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9
Q

It is the standard unit of measurement for heat

A

British Thermal Units (BTU)

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10
Q

the amount of heat needed to raise the temperature of 1 pound
of water 1 degree Fahrenheit, at a constant pressure of 1 atmosphere
(air pressure at sea level)

A

British Thermal Units (BTU)

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11
Q

The standard metric unit for heat

A

Joules (J)

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12
Q

BTU to joules

A

multiply the BTU value by 1055

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13
Q

uniform method of rating the resistance of heat flow through building materials

A

R-value

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14
Q

T or F: The lower the R number, the greater the resistance to heat flow

A

False
Should be higher R value

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15
Q

T or F: When building materials are combined in layers, the sum of their R-
values is the total R-value for the component

A

True
Please memorize this

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16
Q

It accurately indicates the combined thermal conductivity of all materials in a structure, including air spaces

A

U-value

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17
Q

T or F: Does lower R-values and low U values indicate greater efficiency?

A

False
Should be higher R-value

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18
Q

T or F: R-values of building materials vary

A

True

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19
Q

T or F: R-value increases as the thickness of any material is increased..

A

True

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20
Q

T or F: Windows and doors account for most heat loss in cold countries and heat gain in warm regions

A

True

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21
Q

They reflect heat energy (invisible solar radiation) yet transmit visible light

A

Low-emissivity coatings (low-E)

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22
Q

T or F: Heat flows through windows in both directions, through radiation, convection and infiltration (air leakage) only

A

False
Lacking “conduction”

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23
Q

Applied between the panes to slow heat transfer in double windows (double glazing)

A

argon or krypton gas

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24
Q

– cracks around doors, windows and
fireplaces can allow all internal heat to escape in less than an hour

A

poorly constructed building

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25
Q

prevents heat loss/gain by using passive designs

A

Effective orientation and design

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26
Q

It is a significant deterrent to heat loss or heat gain’

A

Insulation

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27
Q

It is any material used to slow the transfer of heat; Retards the transfer of heat; Stops moisture, sound, fire and insect penetration

A

Insulation

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28
Q

T or F: HVAC systems work easier to overcome the loss of warm air or cool air
through walls, floors and ceilings without insulation

A

False: should be work harder

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29
Q

T or F: Proper wall and floor insulation reduce 25% of the heat transfer

A

True

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30
Q

T or F: Add Insulation with an area for ventilation to roofs as 10% of heat transfer is
through the roof

A

False, should be 40 %

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31
Q

It is an insulation outside and surround the structure

A

insulation envelope

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32
Q

These are non-reflective, plastic fabric sheets used to totally wrap the exterior and prevent air vapors and water from penetrating exterior walls

A

Vapor barrier films

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33
Q

Acts as a vapor barrier, the shiny side should face the inside of the building

A

Non-reflective foil sheets

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34
Q

Insulation commonly used for roof, wall and floor structural panels.

A

Foam core insulation

35
Q

Insulation commonly used for columns, beams

A

Structural foam core insulated components

36
Q

It is the amount of heat that passes through an exterior surface of a building

A

Heat loss or heat gain

37
Q

Learn how to compute Heat loss

A

gegegege

38
Q

It is when air is heated in a furnace

A

Warm-air systems

39
Q

allow warm air to rise naturally without the use of fans; rarely used today

A

Gravity system

40
Q

must be located on a level lower than the area to be heated; heating engine

A

Furnace

41
Q

distribute the heated air to outlets throughout the building; can also be used by cooling systems

A

Air ducts

42
Q

Air is blown through the ducts by a fan located in the heating or cooling device.

A

Forced air systems

43
Q

It is when Cool air enters the top and warmed air exits the bottom

A

Downflow furncae

44
Q

It is when cool air enters the bottom

A

Upflow furnace

45
Q

It is when cool and warm air moves at the same level

A

Horizontal flow furnace

46
Q

It utilizes distribution ducts or return ducts

A

Forced-air ducts

47
Q

It brings cool air back to the furnace to be warmed

A

Return ducts

48
Q

It is connected to a plenum chamber

A

Forced-air distribution ducts

49
Q

It is an enclosed space located between the furnace and distribution ducts; Larger than any duct; Slows the flow of air through the ducts

A

Plenum chamber

50
Q

T or F: ducts lead to floor/ceiling outlets at least one outlet for every 4.50m of exterior wall space for both heating and cooling

A

True

51
Q

They vary in patterns and connects a furnace to outlets throughout
the building

A

Duct systems

52
Q

separate ducts directly linked to the furnace or AC unit with each outlet; Provides well-balanced heat, but require more duct length

A

Individual duct system

53
Q

Plenum size may be the same through its length; the same as the individual duct system but utilizes a plenum

A

Individual plenum system

54
Q

It is when a perimeter duct is connected to a furnace with a feeder duct on each side; looped ducts

A

Perimeter loop system

55
Q

All warm-air systems include room outlets or ____ on the floor, ceiling or
wall

A

Registers

56
Q

These are enclosed space in which the air pressure is greater than it is outside (used by the early Romans)

A

Plenum

57
Q

used as a sealed plenum chamber to distribute warm or cool air to floor registers in the rooms

A

Entire underfloor space (crawl space)

58
Q

– include the location of:
▪ Furnace
▪ Outlet
▪ Duct

A

Forced-air system drawings

59
Q

They are drawn in zones with a separate
furnace and ductwork system for each

A

Buildings requiring more than one furnace

60
Q

The use of oil or gas boiler to heat water and a water pump to send the water to
radiators, finned tubes or convectors

A

HYDRONIC (HOT-WATER) UNITS

61
Q

It provides even heat and are quiet and clean; Do not provide air filtration or circulation; Not compatible with cooling systems that require air ducts

A

Hydronic systems

62
Q

It is the most common, most effective hydronic outlet type

A

Baseboard outlet

63
Q

It provides hot water for sinks and showers, eliminating the need for a separate water heater unit

A

Domestic oil burners

64
Q

Types of boiler units

A

Series-loop system, One-pipe system, Two-pipe system, Radiant system

65
Q

A system with continual loop of pipes containing hot water

A

Series-loop system

66
Q

Hot water flows
continually from the
Boiler through the
outlet units and back
again to the boiler
for reheating

A

Series-loop system

67
Q

Heat is controlled
only at the source of
the loop

A

Series-loop system

68
Q

– heated water is circulated through pipes that are connected to radiators or convectors by means of bypass pipes

A

One-pipe system

69
Q

A system that Allows each radiator to be individually controlled by valves
▪ Water flows from one side of each radiator to the main line and returns to the boiler for reheating

A

One-pipe system;

70
Q

has two parallel pipes

A

Two-pipe system

71
Q

One pipe for the supply of hot water from the boiler to each radiator ; One pipe for the return of cooled water from each radiator to the boiler

A

Two-pipe system

72
Q

distributes hot water through a series of continual pipes in floors and sometimes ceilings

A

Radiant system

73
Q

Radiant system: not often because of the weight of the filled

A

Ceiling systems

74
Q

Radiant system:– consists of pipes laid on a concrete base then
covered with a finished concrete slab

A

Radiant floor

75
Q

Steam-heating unit operate from a boiler that makes steam

A

STEAM UNITS

76
Q

It is transported by pipes to radiators or convectors and baseboards that
give off heat;

A

Steam

77
Q

Condenses to water and returns to the boiler to reheated to steam; Functions on water vapor, not hot water

A

Steam

78
Q

Are steam units Easy to install and maintain

A

Yes

79
Q

It is delivered through either perimeter or radial systems

A

Steam heat

80
Q

are steam units ideal for large apartments, commercial buildings, industrial
complexes with separate steam generation facilities

A

Yes

81
Q

Produced when electricity passes through resistance wires; Heat is often radiated; Can be fan-blown (convection)

A

ELECTRIC HEAT

82
Q

placed in panel heaters

A

Resistance wires

83
Q

a device that automatically regulates temperature, or that activates a device when the temperature reaches a certain point.

A

thermostat

84
Q
A

3rd year, First Semester (13 decks)

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