Kentucky Residential Building Code Inspector
Examination Questions with Answers and Detailed
Rationales
Question 1. Under the Kentucky Residential Code (KRC), what is the minimum required footing depth for
a one-family dwelling on undisturbed soil?
A) 12 inches below finished grade
B) 18 inches below finished grade
C) 24 inches below finished grade
D) 30 inches below finished grade
Answer: B
Rationale: The KRC adopts the IRC footings requirement of 12 inches below the finished grade plus an
additional 6 inches for frost protection in Kentucky, totaling 18 inches .
Question 2. Which Kentucky Administrative Regulation grants a code official the authority to issue a
"stop work" order?
A) 815 KAR 7:070(1)
B) 815 KAR 7:105(3)
C) 815 KAR 7:150(2)
D) 815 KAR 7:200(4)
Answer: A
,Rationale: 815 KAR 7:070 outlines the powers of the code official, including the ability to stop work
when a violation is observed .
Question 3. What is the minimum ceiling height required in habitable spaces in a residential building
according to Kentucky codes?
A) 6 feet 8 inches
B) 7 feet 0 inches
C) 7 feet 6 inches
D) 8 feet 0 inches
Answer: B
Rationale: Most residential codes, including Kentucky, require a minimum ceiling height of 7 feet in
habitable rooms to ensure adequate space and comfort .
Question 4. What is the minimum width required for a residential stairway?
A) 30 inches
B) 36 inches
C) 40 inches
D) 42 inches
Answer: B
,Rationale: Residential stairways must be at least 36 inches wide to provide safe passage .
Question 5. What is the maximum riser height for residential stairs?
A) 7 inches
B) 7.75 inches
C) 8 inches
D) 8.25 inches
Answer: C
Rationale: Building codes limit riser height to 8 inches to prevent tripping hazards and ensure uniformity
in stairs .
Question 6. What is the minimum tread depth for residential stairs?
A) 9 inches
B) 10 inches
C) 11 inches
D) 12 inches
Answer: A
Rationale: The minimum tread depth for residential stairs is typically 9 inches, though commercial/public
assembly stairs require 11 inches .
, Question 7. What is the minimum headroom clearance for stairs in a residential building?
A) 6 feet 4 inches
B) 6 feet 6 inches
C) 6 feet 8 inches
D) 7 feet 0 inches
Answer: C
Rationale: Stairs must provide a minimum headroom clearance of 6 feet 8 inches to prevent accidental
bumps and meet code requirements .
Question 8. What is the minimum required ceiling height for a habitable basement?
A) 6 feet 4 inches
B) 6 feet 8 inches
C) 7 feet 0 inches
D) 7 feet 6 inches
Answer: C
Rationale: Habitable basements must meet the same minimum ceiling height of 7 feet as other
habitable spaces for comfort and code compliance .
Examination Questions with Answers and Detailed
Rationales
Question 1. Under the Kentucky Residential Code (KRC), what is the minimum required footing depth for
a one-family dwelling on undisturbed soil?
A) 12 inches below finished grade
B) 18 inches below finished grade
C) 24 inches below finished grade
D) 30 inches below finished grade
Answer: B
Rationale: The KRC adopts the IRC footings requirement of 12 inches below the finished grade plus an
additional 6 inches for frost protection in Kentucky, totaling 18 inches .
Question 2. Which Kentucky Administrative Regulation grants a code official the authority to issue a
"stop work" order?
A) 815 KAR 7:070(1)
B) 815 KAR 7:105(3)
C) 815 KAR 7:150(2)
D) 815 KAR 7:200(4)
Answer: A
,Rationale: 815 KAR 7:070 outlines the powers of the code official, including the ability to stop work
when a violation is observed .
Question 3. What is the minimum ceiling height required in habitable spaces in a residential building
according to Kentucky codes?
A) 6 feet 8 inches
B) 7 feet 0 inches
C) 7 feet 6 inches
D) 8 feet 0 inches
Answer: B
Rationale: Most residential codes, including Kentucky, require a minimum ceiling height of 7 feet in
habitable rooms to ensure adequate space and comfort .
Question 4. What is the minimum width required for a residential stairway?
A) 30 inches
B) 36 inches
C) 40 inches
D) 42 inches
Answer: B
,Rationale: Residential stairways must be at least 36 inches wide to provide safe passage .
Question 5. What is the maximum riser height for residential stairs?
A) 7 inches
B) 7.75 inches
C) 8 inches
D) 8.25 inches
Answer: C
Rationale: Building codes limit riser height to 8 inches to prevent tripping hazards and ensure uniformity
in stairs .
Question 6. What is the minimum tread depth for residential stairs?
A) 9 inches
B) 10 inches
C) 11 inches
D) 12 inches
Answer: A
Rationale: The minimum tread depth for residential stairs is typically 9 inches, though commercial/public
assembly stairs require 11 inches .
, Question 7. What is the minimum headroom clearance for stairs in a residential building?
A) 6 feet 4 inches
B) 6 feet 6 inches
C) 6 feet 8 inches
D) 7 feet 0 inches
Answer: C
Rationale: Stairs must provide a minimum headroom clearance of 6 feet 8 inches to prevent accidental
bumps and meet code requirements .
Question 8. What is the minimum required ceiling height for a habitable basement?
A) 6 feet 4 inches
B) 6 feet 8 inches
C) 7 feet 0 inches
D) 7 feet 6 inches
Answer: C
Rationale: Habitable basements must meet the same minimum ceiling height of 7 feet as other
habitable spaces for comfort and code compliance .
