NCIDQ IDFX EXAM |ACTUAL QUESTIONS AND
VERIFIED ANSWERS|BRAND NEW 2026-2027
UPDATE|GRADED A+
Question 1
In terms of occupant health, which of the following lamp types is BEST used in a bedroom?
(A) LED lamp
(B) Fluorescent lamp
(C) Incandescent lamp
(D) Clear mercury vapor lamp
CORRECT ANSWER
(C) Incandescent lamp
Question 2
A digital signage monitor is going to be installed in an elevator lobby, with the bottom
edge at 36" [914 mm] AFF. What does the designer need to confirm with the signage
vendor?
(A) The monitor depth will not project into the corridor
(B) The monitor depth will not project more than 4" [102 mm] into the corridor (C) The
monitor depth will not project more than 7" [178 mm] into the corridor (D) The monitor
depth will not project more than 12" [305 mm] into the corridor
CORRECT ANSWER
(B) The monitor depth will not project more than 4" [102 mm] into the corridor
Question 3
When designing a stair with open risers, what is the maximum opening between treads?
1
,(A) The opening must not allow a 2" [51 mm] sphere to pass through
(B) The opening must not allow a 4" [102 mm] sphere to pass through
(C) The opening must not allow a 7" [178 mm] sphere to pass through
(D) The opening must not allow an 11" [279 mm] sphere to pass through
CORRECT ANSWER
(B) The opening must not allow a 4" [102 mm] sphere to pass through
Question 4
Which wall construction will provide the BEST speech privacy for a conference room?
(A) Full height 1/2" thick frameless glass storefront system with frosted film
(B) Full height 3/4" thick frameless glass storefront system with frosted film
(C) Full height wood stud with one layer of 5/8" thick gypsum board on each side (D) Full
height metal stud with one layer of 5/8" thick gypsum board on each side
CORRECT ANSWER
(D) Full height metal stud with one layer of 5/8" thick gypsum board on each side
Question 5
What is the typical height of the cut plane, when generating a floor plan?
(A) At the floor line
(B) 4'-0" [1210 mm] above the floor line (C) 6' 0" [1828 mm] above the floor line (D) 8' 0"
[2420 mm] above the floor line
CORRECT ANSWER
(B) 4'-0" [1210 mm] above the floor line
Question 6
2
, An abstract diagram that represent the program's spaces, activities, and circulation
patterns is called a:
(A) bubble diagram
(B) adjacency matrix
(C) blocking diagram
(D) preliminary space plan
CORRECT ANSWER
(A) bubble diagram
Question 7
For a kitchen remodeling client presentation, which drawing type will be the MOST
effective?
(A) Plan oblique drawing
(B) Parallel line drawing
(C) Perspective drawings
(D) Orthographic projection drawings
CORRECT ANSWER
(C) Perspective drawings
Question 8
The client has requested to see a mock-up of the wood paneling for a boardroom. Where
should the Designer indicate this requirement?
(A) As a note on the finish schedule
(B) In the paneling shop drawing review (C) As a note on the boardroom elevation
(D) In the submittal requirements of the specifications
CORRECT ANSWER
3
VERIFIED ANSWERS|BRAND NEW 2026-2027
UPDATE|GRADED A+
Question 1
In terms of occupant health, which of the following lamp types is BEST used in a bedroom?
(A) LED lamp
(B) Fluorescent lamp
(C) Incandescent lamp
(D) Clear mercury vapor lamp
CORRECT ANSWER
(C) Incandescent lamp
Question 2
A digital signage monitor is going to be installed in an elevator lobby, with the bottom
edge at 36" [914 mm] AFF. What does the designer need to confirm with the signage
vendor?
(A) The monitor depth will not project into the corridor
(B) The monitor depth will not project more than 4" [102 mm] into the corridor (C) The
monitor depth will not project more than 7" [178 mm] into the corridor (D) The monitor
depth will not project more than 12" [305 mm] into the corridor
CORRECT ANSWER
(B) The monitor depth will not project more than 4" [102 mm] into the corridor
Question 3
When designing a stair with open risers, what is the maximum opening between treads?
1
,(A) The opening must not allow a 2" [51 mm] sphere to pass through
(B) The opening must not allow a 4" [102 mm] sphere to pass through
(C) The opening must not allow a 7" [178 mm] sphere to pass through
(D) The opening must not allow an 11" [279 mm] sphere to pass through
CORRECT ANSWER
(B) The opening must not allow a 4" [102 mm] sphere to pass through
Question 4
Which wall construction will provide the BEST speech privacy for a conference room?
(A) Full height 1/2" thick frameless glass storefront system with frosted film
(B) Full height 3/4" thick frameless glass storefront system with frosted film
(C) Full height wood stud with one layer of 5/8" thick gypsum board on each side (D) Full
height metal stud with one layer of 5/8" thick gypsum board on each side
CORRECT ANSWER
(D) Full height metal stud with one layer of 5/8" thick gypsum board on each side
Question 5
What is the typical height of the cut plane, when generating a floor plan?
(A) At the floor line
(B) 4'-0" [1210 mm] above the floor line (C) 6' 0" [1828 mm] above the floor line (D) 8' 0"
[2420 mm] above the floor line
CORRECT ANSWER
(B) 4'-0" [1210 mm] above the floor line
Question 6
2
, An abstract diagram that represent the program's spaces, activities, and circulation
patterns is called a:
(A) bubble diagram
(B) adjacency matrix
(C) blocking diagram
(D) preliminary space plan
CORRECT ANSWER
(A) bubble diagram
Question 7
For a kitchen remodeling client presentation, which drawing type will be the MOST
effective?
(A) Plan oblique drawing
(B) Parallel line drawing
(C) Perspective drawings
(D) Orthographic projection drawings
CORRECT ANSWER
(C) Perspective drawings
Question 8
The client has requested to see a mock-up of the wood paneling for a boardroom. Where
should the Designer indicate this requirement?
(A) As a note on the finish schedule
(B) In the paneling shop drawing review (C) As a note on the boardroom elevation
(D) In the submittal requirements of the specifications
CORRECT ANSWER
3
