Building Utilities 2: Midterms Reviewer part 1

Question 1

What are the three methods of heat transfer

Answer 1

Radiation, convection and conduction

Question 2

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

Answer 2

Radiation

Question 3

It is when heat travels through liquids or gases

Answer 3

Convection

Question 4

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

Answer 4

Conduction

Question 5

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

Answer 5

heat loss or heat gain

Question 6

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

Answer 6

Infiltration

Question 7

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

Answer 7

Resistivity

Question 8

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

Answer 8

Measurement standard for heat levels

Question 9

It is the standard unit of measurement for heat

Answer 9

British Thermal Units (BTU)

Question 10

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)

Answer 10

British Thermal Units (BTU)

Question 11

The standard metric unit for heat

Answer 11

Joules (J)

Question 12

BTU to joules

Answer 12

multiply the BTU value by 1055

Question 13

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

Answer 13

R-value

Question 14

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

Answer 14

False
Should be higher R value

Question 15

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

Answer 15

True
Please memorize this

Question 16

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

Answer 16

U-value

Question 17

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

Answer 17

False
Should be higher R-value

Question 18

T or F: R-values of building materials vary

Answer 18

True

Question 19

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

Answer 19

True

Question 20

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

Answer 20

True

Question 21

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

Answer 21

Low-emissivity coatings (low-E)

Question 22

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

Answer 22

False
Lacking “conduction”

Question 23

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

Answer 23

argon or krypton gas

Question 24

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

Answer 24

poorly constructed building

Question 25

prevents heat loss/gain by using passive designs

Answer 25

Effective orientation and design

Question 26

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

Answer 26

Insulation

Question 27

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

Answer 27

Insulation

Question 28

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

Answer 28

False: should be work harder

Question 29

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

Answer 29

True

Question 30

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

Answer 30

False, should be 40 %

Question 31

It is an insulation outside and surround the structure

Answer 31

insulation envelope

Question 32

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

Answer 32

Vapor barrier films

Question 33

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

Answer 33

Non-reflective foil sheets

Question 34

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

Answer 34

Foam core insulation

Question 35

Insulation commonly used for columns, beams

Answer 35

Structural foam core insulated components

Question 36

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

Answer 36

Heat loss or heat gain

Question 37

Learn how to compute Heat loss

Answer 37

gegegege

Question 38

It is when air is heated in a furnace

Answer 38

Warm-air systems

Question 39

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

Answer 39

Gravity system

Question 40

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

Answer 40

Furnace

Question 41

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

Answer 41

Air ducts

Question 42

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

Answer 42

Forced air systems

Question 43

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

Answer 43

Downflow furncae

Question 44

It is when cool air enters the bottom

Answer 44

Upflow furnace

Question 45

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

Answer 45

Horizontal flow furnace

Question 46

It utilizes distribution ducts or return ducts

Answer 46

Forced-air ducts

Question 47

It brings cool air back to the furnace to be warmed

Answer 47

Return ducts

Question 48

It is connected to a plenum chamber

Answer 48

Forced-air distribution ducts

Question 49

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

Answer 49

Plenum chamber

Question 50

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

Answer 50

True

Question 51

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

Answer 51

Duct systems

Question 52

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

Answer 52

Individual duct system

Question 53

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

Answer 53

Individual plenum system

Question 54

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

Answer 54

Perimeter loop system

Question 55

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

Answer 55

Registers

Question 56

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

Answer 56

Plenum

Question 57

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

Answer 57

Entire underfloor space (crawl space)

Question 58

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

Answer 58

Forced-air system drawings

Question 59

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

Answer 59

Buildings requiring more than one furnace

Question 60

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

Answer 60

HYDRONIC (HOT-WATER) UNITS

Question 61

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

Answer 61

Hydronic systems

Question 62

It is the most common, most effective hydronic outlet type

Answer 62

Baseboard outlet

Question 63

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

Answer 63

Domestic oil burners

Question 64

Types of boiler units

Answer 64

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

Question 65

A system with continual loop of pipes containing hot water

Answer 65

Series-loop system

Question 66

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

Answer 66

Series-loop system

Question 67

Heat is controlled only at the source of the loop

Answer 67

Series-loop system

Question 68

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

Answer 68

One-pipe system

Question 69

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

Answer 69

One-pipe system;

Question 70

has two parallel pipes

Answer 70

Two-pipe system

Question 71

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

Answer 71

Two-pipe system

Question 72

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

Answer 72

Radiant system

Question 73

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

Answer 73

Ceiling systems

Question 74

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

Answer 74

Radiant floor

Question 75

Steam-heating unit operate from a boiler that makes steam

Answer 75

STEAM UNITS

Question 76

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

Answer 76

Steam

Question 77

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

Answer 77

Steam

Question 78

Are steam units Easy to install and maintain

Answer 78

Yes

Question 79

It is delivered through either perimeter or radial systems

Answer 79

Steam heat

Question 80

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

Answer 80

Yes

Question 81

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

Answer 81

ELECTRIC HEAT

Question 82

placed in panel heaters

Answer 82

Resistance wires

Question 83

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

Answer 83

thermostat