Updated CSLB Class B General Contractor's License -
Building's Exam: Core Trades (Part 1) Questions and
answers with verified solutions.
B) When the home has an increased demand in amperage - ANSWER:
When do you upgrade an electrical service panel?
A) When current circuits don't have grounding
B) When the home has an increased demand in amperage
C) When upgrading from single pole to two-pole breakers
D) When changing from fluorescent lighting to LED lighting
C) In round columns - ANSWER: Where are spiral rebar ties used?
A) In curved walls
B) In grade beams
C) In round columns
D) In spiral staircases
1/2" - ANSWER: What is the minimum size anchor bolt used to anchor sill
plates to a foundation?
D) All of the above. - ANSWER: Required reinforcement bar splicing
length or lap length is a function of:
A) Diameter of the reinforced bar
,B) Stress in the reinforced bar at the cross section of splicing.
C) Bond-strength between the reinforcing bar and the concrete.
D) All of the above.
Class I
(Class I - used for temporary or for light loadsClass II - used for
structures that will encounter heavy loads) - ANSWER: What class of
formwork is used for temporary or light loads?
A) Higher cured strength. - ANSWER: Compacting placed concrete is
advisable because of:
A) Higher cured strength.
B) Higher compaction.
C) Less water content.
D) Less risk of voids.
D) Careful grading - ANSWER: What would be the easiest way to avoid
puddling under a slab?
A) Drainage ditches
B) Drainage pipes
C) A gravel and sand base
D) Careful grading
Joints designed to separate one pour from another. - ANSWER:
Construction joints are:
, 150 lb/cu. ft. - ANSWER: The average deadload of dry concrete, including
reinforcement, is:
No. 10 AWG - ANSWER: What is the smallest size THW copper conductor
that can be used on a 30-amp branch circuit?
+/- 2 inches - ANSWER: The normal tolerance for the location of bends
and ends of reinforcing bar is:
3 1/2"
(Although most concrete slabs are 4", according to code, the minimum
permissible thickness for the slab is 3 ½".) - ANSWER: What is the
minimum required thickness for a slab?
D) Be attached to the ceiling framing members by bolts, screws, rivets,
or clips
When installing lay-in type lights in suspended ceilings, they need to be
securely attached to the ceiling frame using mechanical methods. This
can be done with bolts, screws, rivets, or clips. However, if using clips
to support the lights, make sure they are specifically designed for this
purpose and approved for use in suspended ceiling assemblies. This
requirement is stated in Section 410.36(B) of the California Electrical
Code. - ANSWER: When installing recessed lay-in type lights in
suspended ceilings, what methods should be used to attach them to the
ceiling framing members, as per the NEC?
A) Be supported independently of the ceiling grid
B) Not be attached to the ceiling framing members
Building's Exam: Core Trades (Part 1) Questions and
answers with verified solutions.
B) When the home has an increased demand in amperage - ANSWER:
When do you upgrade an electrical service panel?
A) When current circuits don't have grounding
B) When the home has an increased demand in amperage
C) When upgrading from single pole to two-pole breakers
D) When changing from fluorescent lighting to LED lighting
C) In round columns - ANSWER: Where are spiral rebar ties used?
A) In curved walls
B) In grade beams
C) In round columns
D) In spiral staircases
1/2" - ANSWER: What is the minimum size anchor bolt used to anchor sill
plates to a foundation?
D) All of the above. - ANSWER: Required reinforcement bar splicing
length or lap length is a function of:
A) Diameter of the reinforced bar
,B) Stress in the reinforced bar at the cross section of splicing.
C) Bond-strength between the reinforcing bar and the concrete.
D) All of the above.
Class I
(Class I - used for temporary or for light loadsClass II - used for
structures that will encounter heavy loads) - ANSWER: What class of
formwork is used for temporary or light loads?
A) Higher cured strength. - ANSWER: Compacting placed concrete is
advisable because of:
A) Higher cured strength.
B) Higher compaction.
C) Less water content.
D) Less risk of voids.
D) Careful grading - ANSWER: What would be the easiest way to avoid
puddling under a slab?
A) Drainage ditches
B) Drainage pipes
C) A gravel and sand base
D) Careful grading
Joints designed to separate one pour from another. - ANSWER:
Construction joints are:
, 150 lb/cu. ft. - ANSWER: The average deadload of dry concrete, including
reinforcement, is:
No. 10 AWG - ANSWER: What is the smallest size THW copper conductor
that can be used on a 30-amp branch circuit?
+/- 2 inches - ANSWER: The normal tolerance for the location of bends
and ends of reinforcing bar is:
3 1/2"
(Although most concrete slabs are 4", according to code, the minimum
permissible thickness for the slab is 3 ½".) - ANSWER: What is the
minimum required thickness for a slab?
D) Be attached to the ceiling framing members by bolts, screws, rivets,
or clips
When installing lay-in type lights in suspended ceilings, they need to be
securely attached to the ceiling frame using mechanical methods. This
can be done with bolts, screws, rivets, or clips. However, if using clips
to support the lights, make sure they are specifically designed for this
purpose and approved for use in suspended ceiling assemblies. This
requirement is stated in Section 410.36(B) of the California Electrical
Code. - ANSWER: When installing recessed lay-in type lights in
suspended ceilings, what methods should be used to attach them to the
ceiling framing members, as per the NEC?
A) Be supported independently of the ceiling grid
B) Not be attached to the ceiling framing members
