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carpentry level 2 bc 2023 > I3 - Windows - LT #1 > Flashcards

I3 - Windows - LT #1 Flashcards

1
Q

What is the purpose of a window?

A

Provides light, and ventilation and allows occupants to see outside.

Fire escape.

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2
Q

What does the dashed line indicate in an elevation view of a window?

A

Dashed lines indicate an opening sash & lines point toward the hinge location.

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3
Q

What are the nominal dimensions of the 5o3o window?

A

5’0 width X 3’0 height

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4
Q

Why are triple-glazed units costly?

A

Frame must be a thicker size to include the extra thick sealed units

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4
Q

Why are triple-glazed units costly?

A

Frame must be a thicker size to include the extra thick sealed units

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5
Q

What does the term Low-E mean?

A

Low-E means film will not let radiant heat waves emit into or from the building

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6
Q

What type of heat loss does a reflective film reduce?

A

Radiant heat

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7
Q

How do double-glazed units reduce heat loss?

A

the air space provides a small amount of insulation against heat loss by conduction

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8
Q

What causes the seal in a sealed unit to fail?

A

Hot summer expands the air in the units, causing them to fail. Many commercial window cleaners contain ammonia or vinegar. These chemicals can react with the sealing materials, causing premature failing of the seal.

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9
Q

What is the most effective way to reduce heat loss through windows?

A

Reducing the window area

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10
Q

What is a mullion used for?

A

Dives the frame vertically, separating the windows

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11
Q

What is the angle of the slope of the sill?

A

11 Degrees

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12
Q

Describe a thermal break.

A

The insulating material is incorporated into the metal-framed windows to stop thermal bridging.

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13
Q

Why aren’t vinyl frames commonly available in dark colors?

A

Darker colors absorb the heat and this leads to warping & sagging.

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14
Q

What is a rebate flange used for?

A

Cover over old frames when installing renovation windows

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15
Q

What loads do window frames have to withstand?

A

The weight of glass & window

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16
Q

What is point fixing?

A

Glass is attached to frames by drilling holes in the glass & bolting or screwing in place

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17
Q

What type of window should butt hinges not be used for?

A

Awning & hopper window

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18
Q

What types of windows are commonly fitted with sliding hinges?

A

Casement, awning & hopper

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19
Q

When are casement adjusters needed?

A

Used to hold a window open when butt hinges are used.

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20
Q

What’s the purpose of a snubber?

A

Prevents bowing of tall sashes, installed between hinges.

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21
Q

What’s the purpose of a lifter?

A

Support a sagging sash at the bottom latch-side corner.

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22
Q

What are hinge stops used for?

A

LImit the opening amount & keep the hinge shoe from coming out of the rack.

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23
Q

What are the two functions of a latch?

A

Securely connects another window when closed & locks the window into place.

24
Q

How do sliding windows and patio door rollers differ?

A

Patio door rollers are heavy-duty and adjustable.

25
Q

Windows that enclose a heated space must be:

A

made using at least two panes of glass.

26
Q

What dimensions are first and second?

A

Width is always given first, then the height

27
Q

What is a fixed window?

A

Non opening

28
Q

What is an elevation view of a window?

A

Looking from the outside of the building

29
Q

Why are fixed windows more energy efficient?

A

No moving parts

30
Q

What does O mean on an elevation view of a window?

A

Fixed

31
Q

What is a casement window?

A

sash Open outward and provides excellent venting.

32
Q

Awning hung window

A

sash is hinged at the top

33
Q

Hopper hung window

A

Sash is hinged at bottom and opens inward

34
Q

Pivoting window

A

Sash of a pivoting window pivots on two pins at either side of the cash

35
Q

Double hung window

A

two sliding sashes that bypass vertically

36
Q

Heat loss through windows is caused by:

A

Conduction, radiation, convection & air leakage

37
Q

Convection heat loss can be reduced by filling the air space in double or triple glazed windows with a heavy gas such as

A

Argon

38
Q

Radiant heat loss can be reduced using

A

films such as low E2

39
Q

Conductive heat loss can be reduced

A

with thermal breaks & better insulating

40
Q

Double glazing windows

A

are windows that enclose a heated space

the air space between the two panes insulates against heat loss by conduction

air film on the surface of the additional pane also adds insulation

the distance between both panes increases the energy effeciency of the window

41
Q

What is triple glazing

A

Same idea, but another pane. Used in high thermal pressure areas caused by colder winters

42
Q

Double-glazed windows on the south side of the building fail

A

Hot sun, expands the air in the units, causing them to fail

43
Q

Heat gain is a concern for buildings with large amounts of glass, what to do?

A

Using window with a reflective film reduces the amount of radiant heat entering the building

44
Q

LOW E and LOW2 are associated with

A

Radiant films, means will not let radiant heat waves emitted into or from buildings

45
Q

E2 glazing has a thin layer of

A

metal

46
Q

Major cause of heat loss from

A

building is leaking of warm air out of buildings and infiltration of cold air in

47
Q

How to prevent air infiltration

A

weather stripping

48
Q

what is a mullion?

A

used to divide the frame vertically & seperate the window units

49
Q

what is a transom?

A

a horizontal member that separates the frame horizontally

50
Q

what is a sash?

A

frame for the glass in a window

51
Q

what is a muntin?

A

Multiple lights are placed in one sash, separated by muntin

52
Q

steel and aluminum is how much more conductive than vinyl and fiberglass?

A

100 to 1000 times

53
Q

the downside of metal window jambs?

A

good conductors of heat, energy efficiency is poor unless other measures are taken

54
Q

how does a large commercial window get installed?

A

Secured to the frame using pressure plates, synthetic rubber clamping, and sealing profile, structural silicone sealant or point fixing

55
Q

What type of hinge is used on an exterior window?

A

Narrow fixed-pin butt hinges are typically used

56
Q

Butt hinge allows for

A

A full opening of the sash (for fire escape)

57
Q

Sliding hinge is used for:

A

casement, awning & hopper, and support sash at the top & bottom. or at each side.

carpentry level 2 bc 2023 (50 decks)

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