I3 - Windows - LT #1

Question 1

What is the purpose of a window?

Answer 1

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

Fire escape.

Question 2

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

Answer 2

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

Question 3

What are the nominal dimensions of the 5o3o window?

Answer 3

5’0 width X 3’0 height

Question 4

Why are triple-glazed units costly?

Answer 4

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

Question 4

Why are triple-glazed units costly?

Answer 4

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

Question 5

What does the term Low-E mean?

Answer 5

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

Question 6

What type of heat loss does a reflective film reduce?

Answer 6

Radiant heat

Question 7

How do double-glazed units reduce heat loss?

Answer 7

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

Question 8

What causes the seal in a sealed unit to fail?

Answer 8

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.

Question 9

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

Answer 9

Reducing the window area

Question 10

What is a mullion used for?

Answer 10

Dives the frame vertically, separating the windows

Question 11

What is the angle of the slope of the sill?

Answer 11

11 Degrees

Question 12

Describe a thermal break.

Answer 12

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

Question 13

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

Answer 13

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

Question 14

What is a rebate flange used for?

Answer 14

Cover over old frames when installing renovation windows

Question 15

What loads do window frames have to withstand?

Answer 15

The weight of glass & window

Question 16

What is point fixing?

Answer 16

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

Question 17

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

Answer 17

Awning & hopper window

Question 18

What types of windows are commonly fitted with sliding hinges?

Answer 18

Casement, awning & hopper

Question 19

When are casement adjusters needed?

Answer 19

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

Question 20

What’s the purpose of a snubber?

Answer 20

Prevents bowing of tall sashes, installed between hinges.

Question 21

What’s the purpose of a lifter?

Answer 21

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

Question 22

What are hinge stops used for?

Answer 22

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

Question 23

What are the two functions of a latch?

Answer 23

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

Question 24

How do sliding windows and patio door rollers differ?

Answer 24

Patio door rollers are heavy-duty and adjustable.

Question 25

Windows that enclose a heated space must be:

Answer 25

made using at least two panes of glass.

Question 26

What dimensions are first and second?

Answer 26

Width is always given first, then the height

Question 27

What is a fixed window?

Answer 27

Non opening

Question 28

What is an elevation view of a window?

Answer 28

Looking from the outside of the building

Question 29

Why are fixed windows more energy efficient?

Answer 29

No moving parts

Question 30

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

Answer 30

Fixed

Question 31

What is a casement window?

Answer 31

sash Open outward and provides excellent venting.

Question 32

Awning hung window

Answer 32

sash is hinged at the top

Question 33

Hopper hung window

Answer 33

Sash is hinged at bottom and opens inward

Question 34

Pivoting window

Answer 34

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

Question 35

Double hung window

Answer 35

two sliding sashes that bypass vertically

Question 36

Heat loss through windows is caused by:

Answer 36

Conduction, radiation, convection & air leakage

Question 37

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

Answer 37

Argon

Question 38

Radiant heat loss can be reduced using

Answer 38

films such as low E2

Question 39

Conductive heat loss can be reduced

Answer 39

with thermal breaks & better insulating

Question 40

Double glazing windows

Answer 40

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

Question 41

What is triple glazing

Answer 41

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

Question 42

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

Answer 42

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

Question 43

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

Answer 43

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

Question 44

LOW E and LOW2 are associated with

Answer 44

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

Question 45

E2 glazing has a thin layer of

Answer 45

metal

Question 46

Major cause of heat loss from

Answer 46

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

Question 47

How to prevent air infiltration

Answer 47

weather stripping

Question 48

what is a mullion?

Answer 48

used to divide the frame vertically & seperate the window units

Question 49

what is a transom?

Answer 49

a horizontal member that separates the frame horizontally

Question 50

what is a sash?

Answer 50

frame for the glass in a window

Question 51

what is a muntin?

Answer 51

Multiple lights are placed in one sash, separated by muntin

Question 52

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

Answer 52

100 to 1000 times

Question 53

the downside of metal window jambs?

Answer 53

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

Question 54

how does a large commercial window get installed?

Answer 54

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

Question 55

What type of hinge is used on an exterior window?

Answer 55

Narrow fixed-pin butt hinges are typically used

Question 56

Butt hinge allows for

Answer 56

A full opening of the sash (for fire escape)

Question 57

Sliding hinge is used for:

Answer 57

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