CSLB Class B General Contractors License
Buildings Exam Core Trades (Part 1) 2026 |
Questions with 100% Correct Answers |
Verified | Latest Update
UPDATES I
1. What fastener spacing is required for the corners of
oriented strand board (OSB)?
A) 6 on edge or 8 on center
B) 6 on edge 12 on center
C) 8 on edge 12 on center
D) 8 on edge 16 on center
Correct Answer: B) 6 on edge 12 on center
2. Can linoleum be repaired or patched?
A) Never
B) Yes, with a pattern match
C) Yes, just cut small patch to fit
D) No, because it's not repairable
Correct Answer: B) Yes, with a pattern match
,3. What is the best tool used to cut a 2 foot diameter hole
in plywood?
A) Jigsaw
B) Keyhole saw
C) Mason saw
D) Hacksaw
Correct Answer: Jigsaw
4. Who may work with asbestos?
A) Contractor carrying asbestos certification
B) General contractor
C) General Engineer
D) Subcontractor
Correct Answer: A) Contractor carrying asbestos
certification
5. What tile is better with sanded grout?
A) 4"x4" with a joint size between 3/32" and 1/16"
B) 4"x4" with a joint size between 1/16" and 5/8"
C) 6"x6" with a joint size between 1/16" and 1/8"
D) 6"x6" with a joint size between 1/8" and 1/4"
,Correct Answer: D) 6"x6" with a joint size between 1/8" and
1/4"
6. If you have concrete subfloor, how would you install
hardwood on top?
A) Nail it but only if there is a vapor barrier under the slab
B) Nail it but only if the hardwood is heavy enough to avoid
warping
C) Nail it along with a water-based membrane
D) Glue down
Correct Answer: D) Glue down
7. When connecting a rafter with collar ties, what nails are
used?
Correct Answer: 10d
8. What is the maximum height of an accessible sink in a
commercial building?
Correct Answer: 34"
9. Of the following, the best tool for door jamb
installations is:
A) T-square
B) Eight-foot level
, C) Six-foot level
D) Plumb
Correct Answer: C) Six-foot level
10. Who gives permission to install a septic system?
Correct Answer: City
11. How much spacing is required for anchor bolts from
the edge of a stem wall?
Correct Answer: 1 3/4"
12. When flooring (wood, laminate, etc.) is delivered to the
job, how does the contractor proceed?
A) Place in the room where it will be installed, and let
acclimate
B) Start installation immediately
C) Put all the laminate in one place and let acclimate
D) Wait a few hours and start installing
Correct Answer: A) Place in the room where it will be
installed, and let acclimate
13. Which of the following is incorrect about mobile
scaffolds?
Buildings Exam Core Trades (Part 1) 2026 |
Questions with 100% Correct Answers |
Verified | Latest Update
UPDATES I
1. What fastener spacing is required for the corners of
oriented strand board (OSB)?
A) 6 on edge or 8 on center
B) 6 on edge 12 on center
C) 8 on edge 12 on center
D) 8 on edge 16 on center
Correct Answer: B) 6 on edge 12 on center
2. Can linoleum be repaired or patched?
A) Never
B) Yes, with a pattern match
C) Yes, just cut small patch to fit
D) No, because it's not repairable
Correct Answer: B) Yes, with a pattern match
,3. What is the best tool used to cut a 2 foot diameter hole
in plywood?
A) Jigsaw
B) Keyhole saw
C) Mason saw
D) Hacksaw
Correct Answer: Jigsaw
4. Who may work with asbestos?
A) Contractor carrying asbestos certification
B) General contractor
C) General Engineer
D) Subcontractor
Correct Answer: A) Contractor carrying asbestos
certification
5. What tile is better with sanded grout?
A) 4"x4" with a joint size between 3/32" and 1/16"
B) 4"x4" with a joint size between 1/16" and 5/8"
C) 6"x6" with a joint size between 1/16" and 1/8"
D) 6"x6" with a joint size between 1/8" and 1/4"
,Correct Answer: D) 6"x6" with a joint size between 1/8" and
1/4"
6. If you have concrete subfloor, how would you install
hardwood on top?
A) Nail it but only if there is a vapor barrier under the slab
B) Nail it but only if the hardwood is heavy enough to avoid
warping
C) Nail it along with a water-based membrane
D) Glue down
Correct Answer: D) Glue down
7. When connecting a rafter with collar ties, what nails are
used?
Correct Answer: 10d
8. What is the maximum height of an accessible sink in a
commercial building?
Correct Answer: 34"
9. Of the following, the best tool for door jamb
installations is:
A) T-square
B) Eight-foot level
, C) Six-foot level
D) Plumb
Correct Answer: C) Six-foot level
10. Who gives permission to install a septic system?
Correct Answer: City
11. How much spacing is required for anchor bolts from
the edge of a stem wall?
Correct Answer: 1 3/4"
12. When flooring (wood, laminate, etc.) is delivered to the
job, how does the contractor proceed?
A) Place in the room where it will be installed, and let
acclimate
B) Start installation immediately
C) Put all the laminate in one place and let acclimate
D) Wait a few hours and start installing
Correct Answer: A) Place in the room where it will be
installed, and let acclimate
13. Which of the following is incorrect about mobile
scaffolds?
