NCIDQ - IDFX EXAM STUDY SET
. The partial floor plan given shows the subdivision of one side of an existing building into five offices with the architectural dimensions given on the outside of the building. Why is office #305 not dimensioned?
(A) It is the same width as office #304.
(B) Dimens...
important criteria for designing a lighting cove w
which pair of performance tests should be specifie
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NCIDQ - IDFX EXAM STUDY SET
NCIDQ - IDFX EXAM STUDY SET
NCIDQ - IDFX EXAM STUDY SET
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NCIDQ - IDFX EXAM STUDY SET
. The partial floor plan given shows the subdivision of one side of an existing building into five
offices with the architectural dimensions given on the outside of the building. Why is office #305
not dimensioned?
(A) It is the same width as office #304.
(B) Dimension strings are left incomplete.
(C) There may be a potential conflict with the existing overall dimension.
(D) The dimensions can be calculated by subtraction from the existing architectural dimensions.
- Answer-The answer is C. When an existing space is subdivided, the designer is relying on
information gathered through onsite measurement or record drawings. The existing overall
dimension may or may not be exactly what is shown on the architectural drawings. By leaving
what is known as an open dimension in the dimension string, the undimensioned space can
accommodate any slight variation between the actual dimension and that shown on the
architectural plans without the contractor raising questions. The open dimension should be the
space that is the least important to have exactly as dimensioned.
There is no information given on the plan that would allow the contractor to determine that an
adjacent office should be the same size as another just by visual inspection (option A).
Dimension strings are not necessarily left incomplete in all circumstances (option B). The
contractor should not have to calculate dimensions, and in this case, the dimension of office
#305 would not be accurate because the thickness of the existing exterior wall is not known.
82. An interior designer is selecting luminaires and lamp sources to illuminate the waiting area
of a medical clinic for which the furniture and finishes have been selected. In order to maintain
the most accurate color rendition of the furniture and finishes, what is the best approach for
selecting the lamps?
(A) Select those with the highest color rendering index (CRI).
(B) Analyze the correlated color temperature (CCT) of the lamps.
(C) Review the spectral energy distribution curves.
(D) View the samples under each lamp being considered. - Answer-The answer is D. Because
there are so many variables that affect the interaction of light sources and the objects they are
illuminating, the best way to evaluate a specific situation is to look at samples of the specified
materials and finishes under the specific light sources under consideration. There are typically
several different colors of finishes and furniture fabrics in any given space, and while one type of
lamp may render one color perfectly, it may shift the apparent color of another. Only by
observing all the object colors under different lamps can the interior designer select the one that
provides the best overall balance.
Option A is incorrect because the CRI is only a measure of how well one light source renders
color compared to a reference source. While generally speaking, the higher the CRI the better,
two light sources can have the same CRI but entirely different chromaticities, and therefore
render the same color differently. Option B would be the second-best way to evaluate lamps
because the CCT would suggest whether the light source would enhance or dull the object
color. For example, a lamp with a low color temperature and more blue components, like a cool-
white fluorescent lamp, would render reds dull and washed out. As the question asks for the
best way to select the lamps, option B is incorrect. Option C is incorrect because the spectral
energy distribution curves would show only what colors predominate, and, like using the CCT,
would give only an approximation of adequate color rendering.
,83. Important criteria for designing a lighting cove would include which of the following?
(Choose the four that apply.)
(A) cost
(B) design intent
(C) ergonomics
(D) aesthetics
(E) support framing
(F) lighting level - Answer-The answer is A, B, D, and F. A lighting cove is a form of indirect
lighting that is built into recesses or ceiling valences and may be used as primary lighting or for
aesthetic accent. Cost, design intent, aesthetics, and lighting levels are all important criteria an
interior designer should consider when designing a lighting cove. However, it is not important to
consider ergonomics for a design element that occupants do not physically use or come in
direct contact with. Although the framing method would have to be detailed, this is not as
important, as there are many ways to detail lighting coves.
84. Which pair of performance tests should be specified for a custom-blended fabric that will be
used in a recreation center's reception area?
(A) vertical ignition and Fade-Ometer
(B) Wyzenbeek and Fade-Ometer
(C) Taber and Wyzenbeek
(D) indentation load deflection and Taber - Answer-The answer is B. The three most important
characteristics to assess in a custom-blended fabric that will be used in a public area are its
wearability, flammability, and fade-resistivity. While any fabric can be treated to make it flame
resistive, only testing can determine whether a custom fabric has sufficient wearability and fade-
resistance for a specific use. The Wyzenbeek abrasion resistance test is commonly used to
assess wearability, while the Fade-Ometer test is used to assess fade-resistance.
85. Which of the following items does NFPA 701 relate to?
(A) wallcoverings
(B) fabrics
(C) draperies
(D) floor coverings - Answer-The answer is C. NFPA 701, Standard Methods of Fire Tests for
Flame-Propagation of Textiles and Films, establishes testing procedures for window treatments.
This is also known as FR 701, so the important thing is to recognize the 701 designation.
86. Which of the following must have AT LEAST a Class III (or C) fire rating?
(A) bookshelves
(B) wainscoting
(C) built-in base cabinets
(D) door and window trim - Answer-The answer is B. Building codes generally require flame-
spread classification for wall finishes only; this includes wainscoting. Other types of woodwork,
such as bookshelves, cabinets, and door and window trim, do not require a particular fire rating.
87. An interior designer has specified a single downlight to illuminate a pedestal directly below.
If the downlight produces 1470 candlepower (cp) and is 7 ft above the pedestal, the illumination
on the pedestal is _______ footcandles (fc). (Fill in the blank.) - Answer-The answer is 30 fc.
For a point source of light, the illumination, E, on a surface varies directly with the luminous
intensity, I, of the source and inversely with the square of the distance, d, between the source
and the point.
The formula for illumination is
,88. The BEST way to avoid fabric slippage over a cushion would be to specify
(A) a heavy fabric pulled tightly over the cushion
(B) a high-density foam cushion with an interliner
(C) rounded corners with welts
(D) channeling - Answer-The answer is D. Channeling is a method of attaching fabric to a
cushion and direct attachment is the best way to avoid slippage. Therefore, option D is the best
choice.
89. The model number and color of a piece of furniture would commonly be found on
(A) the furniture plan
(B) the furniture schedule only
(C) the specifications only
(D) either a furniture schedule or the specifications - Answer-The answer is D. The furniture plan
typically contains only a code number for each piece of furniture. This code number refers either
to a schedule on the drawings or to the specifications, where detailed information is listed, such
as the furniture's manufacturer, model number, color, finish, and so on.
90. When considering the safety of smooth flooring materials, the interior designer should
(A) specify materials with a rough finish
(B) require that the dynamic coefficient of friction have a value of 0.42 or greater
(C) consider the values given by the DCOF AcuTest as well as other variables
(D) use the coefficient of friction values and recommendations of ASTM C1028 - Answer-The
answer is C. The slip resistance of flooring is measured using the DCOF AcuTest. This is the
designated test procedure of the Tile Council of North America. It measures the dynamic
coefficient of friction (DCOF) using a standard lubricant on ceramic tile. Other materials may
respond differently.
Variables that can affect safety include shoe material and the degree of its wear, the presence
and nature of surface contaminants, a person's weight, the angle of impact, stride length, the
wear of the flooring material, and whether the floor is flat or inclined. All these factors should be
taken into account when specifying a flooring material.
The DCOF value of 0.42 is the recommended minimum value for ceramic tile as contained in
American National Standards Institute (ANSI) Standard A137.1, Specifications for Ceramic Tile.
While this is a good starting point, the designer should consider other variables that can affect
the safety of the floor.
Simply specifying a rough finish may not be enough, as the definition of "rough" is ambiguous.
The test in ASTM Standard C1082 is no longer used and has been withdrawn.
91. When reviewing flooring materials to determine which options meet life safety and
accessibility standards for slip resistance, the interior designer should
(A) have the material tested
(B) review the coefficient of friction (COF)
(C) verify requirements of the Americans with Disabilities Act (ADA)
(D) study pertinent ASTM International standards - Answer-The answer is B. The COF is used
to evaluate and specify flooring materials. This value expresses the degree of slip resistance of
a flooring material. Although there are many variables that affect the slip resistance of a flooring
material, and no one value is universally agreed upon for all situations, the COF is the one value
that must be known. Currently, in the United States, American National Standards Institute
(ANSI) standard A137.1, American National Standards Specifications for Ceramic Tile,
references one test, the DCOF AcuTest (DCOF stands for dynamic coefficient of friction). This
requires that ceramic tile for level interior spaces expected to be walked upon when wet must
have a minimum value equal to or greater than 0.42. However, this is just a starting point; the
, interior designer should consider the type of flooring material being evaluated, specific
conditions of the space in which it will be used, expected maintenance procedures, and other
project-specific variables to determine if a material with a higher COF should be specified.
92. Which of the following normally shows the locations of exit signs?
(A) floor plan
(B) reflected ceiling plan
(C) life safety plan
(D) fire protection plan - Answer-The answer is B. Of the four plans given, only the reflected
ceiling plan would normally show exit signs. Exit signs are shown on this plan so that their
positions can be coordinated with those of other items on the ceiling. Exit signs are also shown
on the electrical engineer's lighting plan, which indicates how they are powered and circuited to
the emergency circuits.
93. Which of the following terms represents the efficiency of a luminaire in distributing lamp light
to room surfaces?
(A) coefficient of utilization
(B) lamp lumen depreciation factor
(C) lamp luminance
(D) luminaire efficacy - Answer-The answer is A. The coefficient of utilization (commonly
abbreviated "CU") is a value that is determined and published by the manufacturer. It represents
the efficiency of a luminaire in distributing light from a lamp under various degrees of finish
reflectivity to the floor, walls, and ceiling.
94. Surface-mounted luminaires are MOST often used for which of the following reasons?
(A) Some side and uplighting is desired.
(B) There is not enough space above the ceiling.
(C) They are easier and less expensive to install.
(D) They are used as a design feature. - Answer-The answer is B. Although all the choices are
possible reasons for using surface-mounted luminaires, the lighting fixtures are most often
employed when space is inadequate for recessing.
95. The cover sheet on a set of interior design construction drawings typically includes which of
the following? (Choose the four that apply.)
(A) building department data
(B) client's name and address
(C) index to drawings
(D) small-scale reference floor plan
(E) symbols used on the drawings
(F) zoning department information - Answer-The answer is A, B, C, and E. Cover sheets for
interior design construction drawings commonly include building department data, the client's
name and address, indexes to drawings, and the symbols used. Cover sheets do not contain a
small-scale floor plan or zoning department information.
96. Composite wood veneers can be used
(A) to improve the appearance of book matching
(B) as a substitute for HPDL
(C) as a "green" alternate to standard wood veneers
(D) to increase the yield of veneer from a log - Answer-The answer is C. Composite wood
veneer is an artificial product that uses readily available and fast-growing renewable trees to
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