IIDA PRACTICE TEST CHAPTERS
11-13 EXAM QUESTIONS AND
ANSWERS
Which of the following wall and partition assemblies is INCORRECT with
respect to the indicated fire rating?
a. wood 2x4 studs, 5/8" gypsum plaster on metal lath each side, 5 1/4" face-to-
face thickness = 1 hour fire resistance rating
b. noncombustible metal studs, two layers of 1/2" Type-X gypsum lath each
side, 3 5/8" face-to- face thickness = 2 hour fire resistance rating
c. noncombustible metal studs, 5/8" gypsum plaster on metal lath each side, 4
3/4" face-to-face thickness = 2 hour fire resistance rating
d. wood 2x4 studs, 5/8" Type-X gypsum wallboard each side, 4 3/4" face-to-
face thickness = 1 hour fire resistance rating - ANSWER c
Which of the following stair types may not be used as an exit stair in a
commercial building?
a. straight stair
b. an L-shaped stair
c. a U-shaped stair
d. a winder stair - ANSWER d
What is the maximum dimension of a stair riser?
a. 6"
b. 9"
c. 6.5"
d. 7" - ANSWER d
In designing a new stair in a public building with a 12'-7" floor to floor height,
what is the minimum number of risers for the stair?
,a. 16
b. 22
c. 24
d. 27 - ANSWER b
Non-load bearing concrete block partitions are usually specified for interior use
for which of the following purposes?
a. to provide a durable, fire-resistant partition
b. to provide a durable partition which is less costly to construct than a gypsum
board wall
c. to provide a light-weight, fire-resistant partition
d. to provide a strong, attractive partition which can be used on any type of floor
structure - ANSWER a
Vertical members used between double doors to seal the opening and provide
extra security when the doors are closed are known as:
a. astragals
b. door stops
c. mullions
d. spandrels - ANSWER a
Which of the following statements is TRUE about treads on a straight stair:
a. can be between 8" and 12" in depth
b. may not be less than 11" in depth
c. may not vary along the run of the stairs
d. is a standard 10 1/2" for each step - ANSWER b
What is the minimum dimension for the bottom handrail extension on a stair
handrail?
a. 18" from the bottom of the tread
b. a total of 34" minimum
c. not less than the depth of one tread beyond the bottom riser
d. depends on the depth of the tread, but cannot be less than 30" - ANSWER c
, Which of the following statement is TRUE about handrail for the stairs?
a. must be mounted between 36" and 42" above the front edge of the step
b. must have a 1 1/2" clear space between the handrail and the wall
c. should have a diameter between 1 1/4" to 2"
d. must be made of a non-slip material - ANSWER c
In commercial construction, a standard gypsum board partition can be
constructed to meet a one- hour fire rating or for sound control, if which of the
following is done?
a. the partition is constructed from floor to ceiling
b. the partition is constructed from floor slab to structural ceiling
c. the insulation in the wall is urethane foam
d. the gypsum board is 1/2" thick - ANSWER b
Which of the following labels is required by code for a 20-minute-rated wooden
door?
a. UL
b. CPSC
c. UFAS
d. BOCA - ANSWER a
A door assembly rated for 45 minutes and equipped with a sidelight is typically
used in what type of wall?
a. as a fire wall separating two buildings (in a 3-hour wall) in a firewall
occupancies would be separated by a 1-hour wall with a 45 minute door
b. as a non-rated interior door (in a partition wall) the question tells us the door
is rated
c. as the entry door to a fire stair (in a 2-hour wall) a 2-hour wall needs a 1 1⁄2
hour door
d. as an access door (in a 1-hour wall) - ANSWER d
In designing a new space, the interior designer can influence life safety the most
by coordinating with consultants concerning
11-13 EXAM QUESTIONS AND
ANSWERS
Which of the following wall and partition assemblies is INCORRECT with
respect to the indicated fire rating?
a. wood 2x4 studs, 5/8" gypsum plaster on metal lath each side, 5 1/4" face-to-
face thickness = 1 hour fire resistance rating
b. noncombustible metal studs, two layers of 1/2" Type-X gypsum lath each
side, 3 5/8" face-to- face thickness = 2 hour fire resistance rating
c. noncombustible metal studs, 5/8" gypsum plaster on metal lath each side, 4
3/4" face-to-face thickness = 2 hour fire resistance rating
d. wood 2x4 studs, 5/8" Type-X gypsum wallboard each side, 4 3/4" face-to-
face thickness = 1 hour fire resistance rating - ANSWER c
Which of the following stair types may not be used as an exit stair in a
commercial building?
a. straight stair
b. an L-shaped stair
c. a U-shaped stair
d. a winder stair - ANSWER d
What is the maximum dimension of a stair riser?
a. 6"
b. 9"
c. 6.5"
d. 7" - ANSWER d
In designing a new stair in a public building with a 12'-7" floor to floor height,
what is the minimum number of risers for the stair?
,a. 16
b. 22
c. 24
d. 27 - ANSWER b
Non-load bearing concrete block partitions are usually specified for interior use
for which of the following purposes?
a. to provide a durable, fire-resistant partition
b. to provide a durable partition which is less costly to construct than a gypsum
board wall
c. to provide a light-weight, fire-resistant partition
d. to provide a strong, attractive partition which can be used on any type of floor
structure - ANSWER a
Vertical members used between double doors to seal the opening and provide
extra security when the doors are closed are known as:
a. astragals
b. door stops
c. mullions
d. spandrels - ANSWER a
Which of the following statements is TRUE about treads on a straight stair:
a. can be between 8" and 12" in depth
b. may not be less than 11" in depth
c. may not vary along the run of the stairs
d. is a standard 10 1/2" for each step - ANSWER b
What is the minimum dimension for the bottom handrail extension on a stair
handrail?
a. 18" from the bottom of the tread
b. a total of 34" minimum
c. not less than the depth of one tread beyond the bottom riser
d. depends on the depth of the tread, but cannot be less than 30" - ANSWER c
, Which of the following statement is TRUE about handrail for the stairs?
a. must be mounted between 36" and 42" above the front edge of the step
b. must have a 1 1/2" clear space between the handrail and the wall
c. should have a diameter between 1 1/4" to 2"
d. must be made of a non-slip material - ANSWER c
In commercial construction, a standard gypsum board partition can be
constructed to meet a one- hour fire rating or for sound control, if which of the
following is done?
a. the partition is constructed from floor to ceiling
b. the partition is constructed from floor slab to structural ceiling
c. the insulation in the wall is urethane foam
d. the gypsum board is 1/2" thick - ANSWER b
Which of the following labels is required by code for a 20-minute-rated wooden
door?
a. UL
b. CPSC
c. UFAS
d. BOCA - ANSWER a
A door assembly rated for 45 minutes and equipped with a sidelight is typically
used in what type of wall?
a. as a fire wall separating two buildings (in a 3-hour wall) in a firewall
occupancies would be separated by a 1-hour wall with a 45 minute door
b. as a non-rated interior door (in a partition wall) the question tells us the door
is rated
c. as the entry door to a fire stair (in a 2-hour wall) a 2-hour wall needs a 1 1⁄2
hour door
d. as an access door (in a 1-hour wall) - ANSWER d
In designing a new space, the interior designer can influence life safety the most
by coordinating with consultants concerning
