Chapter 27 M.C.

Question 1

The coping on a roof parapet is generally sloped toward what?

Answer 1

Sloped toward the interior (roof)

Question 2

The coping on a masonry fence wall is generally sloped on ?

Answer 2

Both sides

Question 3

A drip mechanism at the underside of a projecting horizontal surface counters the effect of?

Answer 3

adhesive forces between water molecules and the building surface

Question 4

A capillary break is a ?

Answer 4

Wider space in an otherwise NARROW joint

Question 5

Z-flashing is effective in :

a. horizontal butt joint in cladding
b. a vertical butt joint in cladding
c. a horizontal lapped joint in cladding

Answer 5

A. horizontal butt joint in cladding

Question 6

In terms of water infiltration, the exterior masonry walls in historic buildings functioned as:

a. Waterproof walls
b. drainage walls
c. face-sealed barrier walls
d. dam walls
e. none of the above

Answer 6

e. none of the above

Question 7

The most important feature of an (exterior) drainage wall is:

a. exterior cladding
b. waterproofing of the backup wall
c. flashing
d. weep holes
e. all of the above

Answer 7

e. all of the above

Question 8

Metal anchors are needed to transfer lateral loads to the backup wall in :

a. some veneer walls
b. all veneer walls

Answer 8

a. some veneer walls

Question 9

A curtain wall is separated from the structural frame of the building by a minimum of:

a. 1in.
b. 2in.
c. 3in.
d. 4in.

Answer 9

b 2in.

Question 10

A curtain wall is typically used in buildings whose structural system consists of a :

a. load-bearing masonry wall structure
b. load-bearing reinforced-concrete wall structure or load-bearing masonry wall structure
c. reinforced-concrete frame structure of steel
d. all of the above

Answer 10

c. reinforced-concrete frame structure of steel

Question 11

A backup wall is required in a:

a. curtain wall
b. veneer wall
c. infill wall
d. all of the above

Answer 11

b. veneer wall

Question 12

Suction that pulls wind-driven rain into the air space of a drainage wall takes place on the windward face of a wall. True or False?

Answer 12

True

Question 13

In an ideal pressure-equalized drainage wall,

a. the cladding resists all of the wind load
b. the backup resists all of the wind load
c. the backup is provided with openings to equalize air pressure in the air space
d. all of the above

Answer 13

b. the backup resists all of the wind load

Question 14

An ideal pressure-equalized drainage wall is also referred to as a:

a. pressure-screen wall
b. wind-screen wall
c. no-pressure wall
d. rain-screen wall
e. all of the above

Answer 14

d. rain-screen wall

Question 15

For a pressure-equalized drainage wall to function effectively , the air space must be continuous from floor to floor.
True or False?

Answer 15

False