BDCS

Question 0

What is heat-strengthened glass and how is it often used

Answer 0

Plate glass that is made opaque by a ceramic glaze that is fused over the surface. Used exclusively for spandrel glazing I’m curtain walls

Question 1

Explain the finishing of metals exposed to weather

Answer 1

Alkyd based paint preferred over oil based. Paint should be of the same base type. Coal-tar enamel used if under ground or water

Question 2

Name the 4 basic types of cement and their common use

Answer 2

Type I - normal
Type II - moderate sulfate resist, SOG
Type III - high early strength(high heat), cold weather
type IV- low heat, large pours & hot weather
Type V- sulfate resisting.

Question 3

Bulb tee

Answer 3

Used in gypsum conc deck construction. Connected to main structure. Upside down “T”. Planks rest on flange. Gap from edge of plank to tee web is filled with gypsum grout.

Question 4

What are the three grades of glulam construction

Answer 4

Premium
Architectural
Industrial

Question 5

What is the purpose of strip panel coatings on aluminum frame windows?

Answer 5

Minimize corrosive damage caused by alkalis found in wet concrete mortar and plaster

Question 6

Gypsum partition tiles and blocks are held together with this

Answer 6

Gypsum mortar

Question 7

The apartment building on the rue Franklin in Paris designed by Auguste Perret is known as the first to do what?

Answer 7

Employ the use of reinforced concrete framing

Question 8

Blisters in built up roof decking are caused by what.

Answer 8

The formulation and concentration of moisture and or air anywhere within the build up assembly

Question 9

Concrete having a low water cement ratio is what?

Answer 9

Stronger and more resistant to freezing and thawing

Question 10

How does excessive bleeding affect concrete

Answer 10

Weakens the surface of concrete

Question 11

Class A Door: Location, hours

Answer 11

3 hour, fire walls between buildings or building divisions. 100si max glass per leaf. Auto closing or self closing

Question 12

Class B door

Answer 12

1.5 hour, stair wells. 100si max glass per leaf. Self closing

Question 13

Class C door

Answer 13

45min, opening to corridor or in room partitions. 1296 si max glass per leaf. Self closing

Question 14

Class D door

Answer 14

1.5 hour, exterior wall opening. No glass permitted. Self closing

Question 15

Type v construction

Answer 15

Frame construction. Wood frame

Question 16

Type III construction

Answer 16

Joisted masonry. Masonry walls, wood roof.

Question 17

Type IV construction

Answer 17

Heavy timber

Question 18

Type II construction

Answer 18

non-combustible. (Light gage metal studs)

Question 19

Type IB construction

Answer 19

Fire resistive non-combustible. Mid rise office and group R.

Question 20

Type IA construction

Answer 20

Fire resistive non-combustible. High rise

Question 21

What is calcium chloride?

Answer 21

Accelerant add mixture

Question 22

What is the mathematical relationship between the U-factor (thermal conductance) and R-value (thermal resistance)?

Answer 22

The reciprocal of U is R therefore the thermal conductance (U) of one square foot of R-30 batt insulation is 0.03

Question 23

Ancient roman structure consisting of a 143 foot diameter some resting on a circular masonry wall

Answer 23

Pantheon

Question 24

Building of the Chicago school considered to be the first iron-and-steel-framed sky scraper

Answer 24

Home Insurance Building

Question 25

What is the main reason light gauge metal studs are used in place of wood?

Answer 25

A degree of fire resistance is required that is unobtainable with wood.

Question 26

A process where zinc dust is applied under great heat to metal to impart corrosion resistance

Answer 26

Sherardizing

Question 27

How does aluminum react when exposed to weather?

Answer 27

Thin film of oxide which causes the surface to become dull and chalky

Question 28

Copper and stainless steel do what at about the same rate?

Answer 28

Expand and contract

Question 29

Material used for flashing that is commonly painted to minimize corrosion

Answer 29

Galvanized sheet metal

Question 30

Process that employs an electric current and an Electrolux solution to deposit a metallic coating on steel is called

Answer 30

Electroplating

Question 31

In glulam beams better grade lumber is used where and why?

Answer 31

In the outer laminations because this is where the flexural stresses are higher

Question 32

The greatest drying shrinkage of lumber is in which direction?

Answer 32

Across the grain rather than parallel

Question 33

When should add mixtures be added to a batch?

Answer 33

Before or during mixing. Never after

Question 34

Glass block is always set in what pattern?

Answer 34

Stacked bond. Running bond creates pressure points. Blocks cannot be cut and a running bond requires the use of half pieces at the ends

Question 35

Damp proofing cannot resist...

Answer 35

Constant hydrostatic pressure

Question 36

In the design of metal gutters one must be concerned with what?

Answer 36

Roof pitch, roof area, cross sectional gutter area

Question 37

What is the main difference between the installation of wood shingle versus asphalt shingles

Answer 37

Wood shingles are installed over spaced strips while asphalt shingles must be installed over solid sheathing

Question 38

Damp proofing most often involves the application of _________, not the use of ___________, which are used in waterproofing.

Answer 38

Liquid coatings, membranes

Question 39

If terrazzo is installed over wood substrate how is the inherent movement of the structure mitigated

Answer 39

It is isolated from the wood by a membrane and sometimes a layer of sand

Question 40

Name the three main factors that have contributed to the economy of high rise construction

Answer 40

Advancements in the steel rolling process, high speed elevators, improved connection methods such as welding and high strength bolting

Question 41

How should one remedy trapped air or moisture bubbles in built up roofing

Answer 41

Puncture the bubble and resurface that specific area

Question 42

Typically structural costs amount to what percent of the total construction cost?

Answer 42

25%

Question 43

What does adding hydrated lime to mortar do to the mixture

Answer 43

increases workability and water retention

Question 44

what type of tree does soft wood come from

Answer 44

evergreen

Question 45

what type of tree does hard wood come from

Answer 45

deciduous

Question 46

What is the purpose of a cant strip

Answer 46

To allow the felt layers to be slightly bent instead of 90 degrees where breakage would likely occur

Question 47

What happens to concrete as the waster cement ratio increases

Answer 47

The strength decreases

Question 48

Where does the vapor barrier go?

Answer 48

On the warm or room side. Vapor barrier is different from water proofing. I'm california there would be no need for the vapor barrier generally