IDPX PREP SERIES QUESTIONS WITH CORRECT ANSWERS LATEST 2025
AN INTERIOR DESIGNER HAS DETERMINED THE REQUIRED GROSS OCCUPANT AREA
REQUIRED FOR A CLIENT PLANNING TO LEASE SPACE IN AN OFFICE BUILDING. USING THE
BUILDING OWNERS AND MANAGER ASSOCIATION (BOMA) STANDARD ANSI/BOMA Z65.1,
OFFICE BUILDINGS: STANDARD METHODS OF MEASUREMENT, WHICH OF THE FOLLOWING
WOULD BE USED TO DETERMINE THE AMOUNT OF LEASE SPACE THE CLIENT WILL BE
PAYING FOR?
• (A) Building efficiency ratio
• (B) Building load factor
• (C) R/u factor
• (D) Rentable area - Answers • (B) Building load factor
he building load factor accounts for each tenant's share of the common areas of the building,
such as restrooms, public corridors, and elevator lobbies. The building owner calculates the
load factor using one of two methods, Method A and Method B, as defined by the ANSI/BOMA
Z65.1 standard. Once the gross floor area of a tenant space is known, it is multiplied by the load
factor to determine the total square footage upon which the rent calculations will be based.
• The building efficiency ratio is the ratio of the net assignable area of a building to the gross
building area. The R/U ratio is the rentable area divided by the usable area of each floor in an
office building and is used by Method A of ANSI/BOMA Z65.1 to determine the load factor
which may vary from floor to floor. Although basically the same as the load factor referenced in
Method A, the correct term is
building load factor because Method B of ANSI/BOMA Z65.1 is used to develop a building load
factor that is the same for the entire building. The rentable area is what the tenant pays rent on.
A DESIGNER HAS BEEN ENGAGED TO WORK ON A NEW PROJECT INVOLVING AN OFFICE
RELOCATION FOR THEIR CLIENT. THE PROJECT IS VERY COMPLICATED WITH MANY
INTERCONNECTED ACTIVITIES. TO DETERMINE A FEASIBLE PROJECT TIMELINE AND ENSURE
THE PROJECT STAYS ON THE TRACK, IT WOULD BE ESSENTIAL TO UTILIZE A
(A) Critical path method
• (B) Milestone chart
• (C) Bar chart
• (D) Scheduling method - Answers (A) Critical path method
,A CPM chart graphically depicts all the tasks required to complete a project, the sequence in
which they must occur, their duration, the earliest or latest possible starting time, and the
earliest or latest possible finishing time. It also defines the sequence of critical tasks, or tasks
that must be started and finished exactly on time if the total schedule is to be met.
DURING DESIGN DEVELOPMENT OF A COMMERCIAL OFFICE SPACE, THE INTERIOR DESIGNER
CAN MINIMIZE ENERGY USE BY COORDINATING SPACE PLANNING WITH
• (A) Daylighting zones
• (B) HVAC zones
• (C) Occupant sensor controls
• (D) Time-switch controls - Answers • (A) Daylighting zones
Daylighting zones are areas near windows, roof monitors, and skylights where daylight-
responsive controls are required by the International Energy Conservation Code (IECC). The
IECC defines where these zones are located based on the size of the fenestrations, ceiling
height, and obstructions. In section view, the daylight zones extend as far into the building from
the windows as the distance from the floor to the top of the window. In plan view, it extends 2
feet on either side of the window jamb, or to the nearest wall, whichever is less. When planning
the interior configuration, the designer should determine where these spaces are and locate
uses within them that can function well with daylight-responsive controls. Other types of lighting
controls should be specified for spaces beyond these zones.
• HVAC zones are established by the mechanical engineer and generally function independently
of areas that the interior designer may have control over, which might amount to any significant
energy savings. Occupant sensor controls, although important for energy savings, only detect
the presence or absence of people within an area and turn the lighting or other devices on or off.
The do not relate directly to space planning, especially during design development. Time-switch
controls turn off lights or other loads automatically based on time schedules, such as overnight
or on holidays.
IN MOST SITUATIONS, THE APPLICATION FOR A BUILDING PERMIT IS MADE BY THE
• (A) Building Owner
• (B) Client
• (C) Contractor
• (D) Interior Designer - Answers • (C) Contractor
, The contractor is the person typically responsible for submitting the plans and specifications to
the building department, along with the application for a permit.
WHICH ARE THE MOST IMPORTANT FACTORS IN DETERMINING THE SPACE REQUIRED FOR A
NURSES' STATION IN A HOSPITAL
• (A) Number of patient contacts and files
• (B) Work surface and storage requirements
• (C) Number of moveable carts and space requirements for writing reports
• (D) Electrical and communication equipment requirements - Answers • (B) Work surface and
storage requirements
A nurses' workstation requires much record keeping and the temporary and long-term storage
of a variety of items. The work surface and storage requirements will include provisions for
most of the elements that use large amounts of space, including report writing and the number
of patient files and moveable carts. Electrical and communication equipment requirements do
not contribute significantly to the space needed for the nurses' station.
IN INVESTIGATING THE EXISTING CONDITIONS OF AN OLDER BUILDING BEFORE BEGINNING
SPACE PLANNING, A PROJECT MANAGER WOULD PROBABLY NEED TO SEEK EXPERT
CONSULTING ASSISTANCE TO DETERMINE THE
(A) Number of supply air diffusers in the space
• (B) Existence of floor-mounted electrical outlets in an open space
• (C) Presence of adequate water pressure to add a sink in a washroom
• (D) Feasibility of opening a double-wide doorway in an existing loadbearing wall - Answers (D)
Feasibility of opening a double-wide doorway in an existing loadbearing wall
An interior designer would need to consult a structural engineer to determine the feasibility of
modifying a loadbearing wall. The information listed in options A, B, and C could easily be
determined through simple inspection by someone on the designer's team. The adequacy of the
air supply would have to be determined by a mechanical consultant, but the number of diffusers
could easily be counted. Water pressure for one additional sink could be verified by turning on a
faucet.
AN INTERIOR DESIGNER HAS DETERMINED THE REQUIRED GROSS OCCUPANT AREA
REQUIRED FOR A CLIENT PLANNING TO LEASE SPACE IN AN OFFICE BUILDING. USING THE
BUILDING OWNERS AND MANAGER ASSOCIATION (BOMA) STANDARD ANSI/BOMA Z65.1,
OFFICE BUILDINGS: STANDARD METHODS OF MEASUREMENT, WHICH OF THE FOLLOWING
WOULD BE USED TO DETERMINE THE AMOUNT OF LEASE SPACE THE CLIENT WILL BE
PAYING FOR?
• (A) Building efficiency ratio
• (B) Building load factor
• (C) R/u factor
• (D) Rentable area - Answers • (B) Building load factor
he building load factor accounts for each tenant's share of the common areas of the building,
such as restrooms, public corridors, and elevator lobbies. The building owner calculates the
load factor using one of two methods, Method A and Method B, as defined by the ANSI/BOMA
Z65.1 standard. Once the gross floor area of a tenant space is known, it is multiplied by the load
factor to determine the total square footage upon which the rent calculations will be based.
• The building efficiency ratio is the ratio of the net assignable area of a building to the gross
building area. The R/U ratio is the rentable area divided by the usable area of each floor in an
office building and is used by Method A of ANSI/BOMA Z65.1 to determine the load factor
which may vary from floor to floor. Although basically the same as the load factor referenced in
Method A, the correct term is
building load factor because Method B of ANSI/BOMA Z65.1 is used to develop a building load
factor that is the same for the entire building. The rentable area is what the tenant pays rent on.
A DESIGNER HAS BEEN ENGAGED TO WORK ON A NEW PROJECT INVOLVING AN OFFICE
RELOCATION FOR THEIR CLIENT. THE PROJECT IS VERY COMPLICATED WITH MANY
INTERCONNECTED ACTIVITIES. TO DETERMINE A FEASIBLE PROJECT TIMELINE AND ENSURE
THE PROJECT STAYS ON THE TRACK, IT WOULD BE ESSENTIAL TO UTILIZE A
(A) Critical path method
• (B) Milestone chart
• (C) Bar chart
• (D) Scheduling method - Answers (A) Critical path method
,A CPM chart graphically depicts all the tasks required to complete a project, the sequence in
which they must occur, their duration, the earliest or latest possible starting time, and the
earliest or latest possible finishing time. It also defines the sequence of critical tasks, or tasks
that must be started and finished exactly on time if the total schedule is to be met.
DURING DESIGN DEVELOPMENT OF A COMMERCIAL OFFICE SPACE, THE INTERIOR DESIGNER
CAN MINIMIZE ENERGY USE BY COORDINATING SPACE PLANNING WITH
• (A) Daylighting zones
• (B) HVAC zones
• (C) Occupant sensor controls
• (D) Time-switch controls - Answers • (A) Daylighting zones
Daylighting zones are areas near windows, roof monitors, and skylights where daylight-
responsive controls are required by the International Energy Conservation Code (IECC). The
IECC defines where these zones are located based on the size of the fenestrations, ceiling
height, and obstructions. In section view, the daylight zones extend as far into the building from
the windows as the distance from the floor to the top of the window. In plan view, it extends 2
feet on either side of the window jamb, or to the nearest wall, whichever is less. When planning
the interior configuration, the designer should determine where these spaces are and locate
uses within them that can function well with daylight-responsive controls. Other types of lighting
controls should be specified for spaces beyond these zones.
• HVAC zones are established by the mechanical engineer and generally function independently
of areas that the interior designer may have control over, which might amount to any significant
energy savings. Occupant sensor controls, although important for energy savings, only detect
the presence or absence of people within an area and turn the lighting or other devices on or off.
The do not relate directly to space planning, especially during design development. Time-switch
controls turn off lights or other loads automatically based on time schedules, such as overnight
or on holidays.
IN MOST SITUATIONS, THE APPLICATION FOR A BUILDING PERMIT IS MADE BY THE
• (A) Building Owner
• (B) Client
• (C) Contractor
• (D) Interior Designer - Answers • (C) Contractor
, The contractor is the person typically responsible for submitting the plans and specifications to
the building department, along with the application for a permit.
WHICH ARE THE MOST IMPORTANT FACTORS IN DETERMINING THE SPACE REQUIRED FOR A
NURSES' STATION IN A HOSPITAL
• (A) Number of patient contacts and files
• (B) Work surface and storage requirements
• (C) Number of moveable carts and space requirements for writing reports
• (D) Electrical and communication equipment requirements - Answers • (B) Work surface and
storage requirements
A nurses' workstation requires much record keeping and the temporary and long-term storage
of a variety of items. The work surface and storage requirements will include provisions for
most of the elements that use large amounts of space, including report writing and the number
of patient files and moveable carts. Electrical and communication equipment requirements do
not contribute significantly to the space needed for the nurses' station.
IN INVESTIGATING THE EXISTING CONDITIONS OF AN OLDER BUILDING BEFORE BEGINNING
SPACE PLANNING, A PROJECT MANAGER WOULD PROBABLY NEED TO SEEK EXPERT
CONSULTING ASSISTANCE TO DETERMINE THE
(A) Number of supply air diffusers in the space
• (B) Existence of floor-mounted electrical outlets in an open space
• (C) Presence of adequate water pressure to add a sink in a washroom
• (D) Feasibility of opening a double-wide doorway in an existing loadbearing wall - Answers (D)
Feasibility of opening a double-wide doorway in an existing loadbearing wall
An interior designer would need to consult a structural engineer to determine the feasibility of
modifying a loadbearing wall. The information listed in options A, B, and C could easily be
determined through simple inspection by someone on the designer's team. The adequacy of the
air supply would have to be determined by a mechanical consultant, but the number of diffusers
could easily be counted. Water pressure for one additional sink could be verified by turning on a
faucet.
