MASSACHUSETTS CONSTRUCTION SUPERVISOR LICENSE
(CSL) ACTUAL EXAM 2026/2027 ACCURATE TEST APPROVED
QUESTIONS AND CORRECT VERIFIED ANSWERS WITH
DETAILED RATIONALES (100% EXPERT VERIFIED
SOLUTIONS) CURRENTLY UPDATED VERSION 2026 EDITION
|GUARANTEED SUCCESS A+ (BRAND NEW!) |INSTANT
DOWNLOAD PDF
1. What is the minimum required fire-resistance rating for a load-bearing wall in a
Type IIB building under the Massachusetts Building Code (780 CMR)?
A) 0 hours
B) 1 hour
C) 2 hours
D) 3 hours
CORRECT ANSWER: B) 1 hour
*Rationale: Under 780 CMR (Massachusetts Building Code), Type IIB
construction requires non-combustible materials with no fire resistance for most
structural members, but load-bearing walls in buildings over one story typically
require 1-hour fire resistance unless exceptions apply.*
2. According to 780 CMR, the maximum allowable floor area for a single-story,
sprinkle red Group B occupancy building with Type IIA construction is:
A) 12,000 sq. ft.
B) 38,000 sq. ft.
C) 55,000 sq. ft.
D) 75,000 sq. ft.
CORRECT ANSWER: B) 38,000 sq. ft.
Rationale: Table 506.2 of 780 CMR sets allowable area factors. For Group B,
Type IIA, sprinkle red, the base area is 38,000 sq. ft. (increased from
unsprinklered due to sprinkler allowance).
3. What is the minimum required net clear width for a stairway serving an
occupant load of 200 persons in a nonsprinklered building?
A) 36 inches
B) 44 inches
,C) 56 inches
D) 72 inches
CORRECT ANSWER: C) 56 inches
*Rationale: 780 CMR Table 1005.1 requires stairway width based on occupant
load and capacity factor (0.3 inches per person for stairs). 200 × 0.3 = 60 inches,
but minimum width for nonsprinklered stairs is 56 inches (36 inches for
sprinklered). *
4. Under the Massachusetts Architectural Access Board (521 CMR), the maximum
slope for an accessible ramp is:
A) 1:10
B) 1:12
C) 1:15
D) 1:20
CORRECT ANSWER: B) 1:12
Rationale: 521 CMR Section 24.1 requires accessible ramps have a maximum
slope of 1:12 (8.33%). Steeper slopes are only permitted for short distances under
specific exceptions.
Question 5: What is the minimum number of water closets required for a single-
family dwelling under the Massachusetts Plumbing Code (248 CMR)?
A) 1
B) 2
C) 3
D) 4
CORRECT ANSWER: A) 1
Rationale: 248 CMR 10.10(1) requires at least one water closet for each dwelling
unit. Additional fixtures are not mandated by code based on square footage.
6. What is the maximum riser height permitted for a stairway in a residential
building under 780 CMR?
A) 7 inches
B) 7.75 inches
C) 8 inches
D) 8.25 inches
CORRECT ANSWER: B) 7.75 inches
Rationale: 780 CMR Table 1005.3.2 (or IRC R311.7.5.1 as adopted) allows
, maximum riser height of 7.75 inches for residential stairs. Commercial stairs max
riser is 7 inches.
7. When constructing a deck attached to a house in Massachusetts, what is the
minimum required footing depth below grade to prevent frost heave?
A) 24 inches
B) 48 inches
C) 60 inches
D) 72 inches
CORRECT ANSWER: B) 48 inches
Rationale: Massachusetts requires frost protection depth of 48 inches (4 feet) per
780 CMR Table 403.1, based on historical frost penetration. Deck footings must
extend below frost line.
8. Which of the following is an allowed method for meeting the Massachusetts
Stretch Energy Code (225 CMR 22.00) for a new single-family home?
A) Install single-pane windows
B) Achieve HERS rating of 55 or lower
C) Use no insulation in attic
D) Install gas fireplace without damper
CORRECT ANSWER: B) Achieve HERS rating of 55 or lower
Rationale: 225 CMR 22.00 (Stretch Code) requires performance path including
HERS index ≤ 55 (or ≤ 60 depending on version). Current 2023 IECC amendments
set HERS ≤ 55.
9. For a means of egress door in a Group R-2 occupancy, what is the minimum
required clear opening width?
A) 28 inches
B) 32 inches
C) 34 inches
D) 36 inches
CORRECT ANSWER: B) 32 inches
*Rationale: 780 CMR Section 1010.1.1 requires egress doors have clear width of
not less than 32 inches (measured between face of door and stop). R-2 occupancies
follow same rule. *
10. Under Massachusetts law, a construction supervisor license is required for any
contract involving:
A) Painting a single room
(CSL) ACTUAL EXAM 2026/2027 ACCURATE TEST APPROVED
QUESTIONS AND CORRECT VERIFIED ANSWERS WITH
DETAILED RATIONALES (100% EXPERT VERIFIED
SOLUTIONS) CURRENTLY UPDATED VERSION 2026 EDITION
|GUARANTEED SUCCESS A+ (BRAND NEW!) |INSTANT
DOWNLOAD PDF
1. What is the minimum required fire-resistance rating for a load-bearing wall in a
Type IIB building under the Massachusetts Building Code (780 CMR)?
A) 0 hours
B) 1 hour
C) 2 hours
D) 3 hours
CORRECT ANSWER: B) 1 hour
*Rationale: Under 780 CMR (Massachusetts Building Code), Type IIB
construction requires non-combustible materials with no fire resistance for most
structural members, but load-bearing walls in buildings over one story typically
require 1-hour fire resistance unless exceptions apply.*
2. According to 780 CMR, the maximum allowable floor area for a single-story,
sprinkle red Group B occupancy building with Type IIA construction is:
A) 12,000 sq. ft.
B) 38,000 sq. ft.
C) 55,000 sq. ft.
D) 75,000 sq. ft.
CORRECT ANSWER: B) 38,000 sq. ft.
Rationale: Table 506.2 of 780 CMR sets allowable area factors. For Group B,
Type IIA, sprinkle red, the base area is 38,000 sq. ft. (increased from
unsprinklered due to sprinkler allowance).
3. What is the minimum required net clear width for a stairway serving an
occupant load of 200 persons in a nonsprinklered building?
A) 36 inches
B) 44 inches
,C) 56 inches
D) 72 inches
CORRECT ANSWER: C) 56 inches
*Rationale: 780 CMR Table 1005.1 requires stairway width based on occupant
load and capacity factor (0.3 inches per person for stairs). 200 × 0.3 = 60 inches,
but minimum width for nonsprinklered stairs is 56 inches (36 inches for
sprinklered). *
4. Under the Massachusetts Architectural Access Board (521 CMR), the maximum
slope for an accessible ramp is:
A) 1:10
B) 1:12
C) 1:15
D) 1:20
CORRECT ANSWER: B) 1:12
Rationale: 521 CMR Section 24.1 requires accessible ramps have a maximum
slope of 1:12 (8.33%). Steeper slopes are only permitted for short distances under
specific exceptions.
Question 5: What is the minimum number of water closets required for a single-
family dwelling under the Massachusetts Plumbing Code (248 CMR)?
A) 1
B) 2
C) 3
D) 4
CORRECT ANSWER: A) 1
Rationale: 248 CMR 10.10(1) requires at least one water closet for each dwelling
unit. Additional fixtures are not mandated by code based on square footage.
6. What is the maximum riser height permitted for a stairway in a residential
building under 780 CMR?
A) 7 inches
B) 7.75 inches
C) 8 inches
D) 8.25 inches
CORRECT ANSWER: B) 7.75 inches
Rationale: 780 CMR Table 1005.3.2 (or IRC R311.7.5.1 as adopted) allows
, maximum riser height of 7.75 inches for residential stairs. Commercial stairs max
riser is 7 inches.
7. When constructing a deck attached to a house in Massachusetts, what is the
minimum required footing depth below grade to prevent frost heave?
A) 24 inches
B) 48 inches
C) 60 inches
D) 72 inches
CORRECT ANSWER: B) 48 inches
Rationale: Massachusetts requires frost protection depth of 48 inches (4 feet) per
780 CMR Table 403.1, based on historical frost penetration. Deck footings must
extend below frost line.
8. Which of the following is an allowed method for meeting the Massachusetts
Stretch Energy Code (225 CMR 22.00) for a new single-family home?
A) Install single-pane windows
B) Achieve HERS rating of 55 or lower
C) Use no insulation in attic
D) Install gas fireplace without damper
CORRECT ANSWER: B) Achieve HERS rating of 55 or lower
Rationale: 225 CMR 22.00 (Stretch Code) requires performance path including
HERS index ≤ 55 (or ≤ 60 depending on version). Current 2023 IECC amendments
set HERS ≤ 55.
9. For a means of egress door in a Group R-2 occupancy, what is the minimum
required clear opening width?
A) 28 inches
B) 32 inches
C) 34 inches
D) 36 inches
CORRECT ANSWER: B) 32 inches
*Rationale: 780 CMR Section 1010.1.1 requires egress doors have clear width of
not less than 32 inches (measured between face of door and stop). R-2 occupancies
follow same rule. *
10. Under Massachusetts law, a construction supervisor license is required for any
contract involving:
A) Painting a single room
