CBD Space Planning & Layout Design 4

Question 1

A bathroom with 5 feet × 8 feet dimensions is considered which type of layout in residential design?

Accepted Answer

Full bath (standard)

Answer

A 5×8 foot bathroom is the classic full bath size accommodating a toilet, sink, and tub/shower combination in a compact but functional layout.

Question 2

When space planning a double-sink vanity, what is the NKBA recommended minimum distance between the two sink centerlines?

Accepted Answer

30 inches

Answer

NKBA recommends a minimum of 30 inches between sink centerlines in a double vanity to provide adequate elbow room for two users.

Question 3

What is the primary purpose of a vestibule in a large master bathroom layout?

Accepted Answer

To serve as a transitional entry that provides privacy and separates the bedroom from wet areas

Answer

A vestibule creates a transitional zone that provides visual and acoustic privacy between the bedroom and the bathroom's wet zones.

Question 4

Which of the following best describes the 'five-foot rule' in universal bathroom design?

Accepted Answer

A 60-inch clear floor diameter must be maintained for wheelchair turning

Answer

The five-foot (60-inch) rule refers to the minimum clear floor diameter needed for a wheelchair to execute a complete 180- or 360-degree turn.

Question 5

When specifying a curbless (zero-threshold) shower, the designer must ensure the floor has a minimum slope of approximately how much per foot toward the drain?

Accepted Answer

1/4 inch per foot

Answer

A curbless shower floor requires a minimum slope of 1/4 inch per foot toward the drain to ensure proper water drainage and prevent pooling.

(CBD) Certified Bathroom Designer Practice Test

(CBD) Certified Bathroom Designer Practice Test

CBD Space Planning & Layout Design 4