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CALIFORNIA C-50 REINFORCING STEEL
CONTRACTOR LICENSE Exam 2026-2027 BANK
QUESTIONS WITH DETAILED VERIFIED ANSWERS
EXAM QUESTIONS WILL COME FROM HERE (100%
Latest Already Graded A+
Question 1
A structural engineer specifies #8 reinforcing bars with a clear cover of
2 inches for a column footing cast against earth. According to ACI 318,
what is the minimum clear cover required for cast-in-place concrete
cast against earth?
A) 1.5 inches
B) 2 inches
C) 3 inches
D) 4 inches
Answer: C) 3 inches
Explanation: ACI 318 requires a minimum clear cover of 3 inches for
concrete cast against earth and permanently exposed to earth. While
the engineer specified 2 inches, this does not meet the code minimum,
and the contractor must bring this to the engineer's attention. The 2-
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inch cover is acceptable for concrete exposed to weather but not for
earth contact.
Question 2
When field bending a #11 reinforcing bar, what is the minimum
allowable inside bend diameter measured from the inside of the bar?
A) 6 bar diameters
B) 8 bar diameters
C) 10 bar diameters
D) 12 bar diameters
Answer: B) 8 bar diameters
Explanation: ACI 318 specifies that for #11 bars and larger, the
minimum inside bend diameter must be at least 8 bar diameters for
standard hooks. This requirement prevents cracking or breaking of the
bar during bending and ensures proper anchorage capacity.
Question 3
The contract documents specify epoxy-coated reinforcing bars. During
delivery, you observe significant damage to the coating on over 20
percent of the bars. What is the proper course of action?
A) Apply a field-applied epoxy patching compound to all damaged areas
B) Reject the entire delivery and request replacement bars
C) Use the bars in non-critical structural locations
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D) Clean the damaged areas and apply zinc-rich primer
Answer: B) Reject the entire delivery and request replacement bars
Explanation: When epoxy coating is damaged on more than 2 percent
of the surface area of a bar, or if damage exceeds 20 percent of a single
bar's coating, the bar must be rejected. Industry standards such as
ASTM A775 require that coating damage be repaired only if it is minor
and isolated. Extensive damage compromises corrosion protection and
structural integrity.
Question 4
A continuous footing requires lap splices for #7 reinforcing bars. The
specified concrete has a compressive strength of 4,000 psi and the bars
are Grade 60. What is the minimum required lap length for tension lap
splices in a Class B splice?
A) 24 inches
B) 30 inches
C) 36 inches
D) 42 inches
Answer: B) 30 inches
Explanation: The development length for #7 Grade 60 bars in 4,000 psi
concrete is approximately 30 inches for a Class B tension lap splice,
which is 1.3 times the development length. The calculation uses the
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formula ld = (0.11 × fy × db) / (√f'c) and then applies the Class B
multiplier, resulting in approximately 30 inches.
Question 5
Which of the following is the correct sequence of operations for placing
reinforcing steel in a deep foundation mat?
A) Place bottom bars, place top bars, place spacers, install chairs
B) Install chairs, place bottom bars, place top bars, tie intersections
C) Place bottom bars, install chairs, place top bars, place spacers
D) Place bottom bars, place spacers, install chairs, place top bars
Answer: D) Place bottom bars, place spacers, install chairs, place top
bars
Explanation: The proper sequence begins with placing bottom
reinforcement directly on the ground or on preplaced spacers to ensure
proper cover. Chairs are then installed to support the top mat of
reinforcement. Top bars are placed last, ensuring the reinforcing cage is
stable and maintains the designed spacing and cover throughout the
concrete placement.
Question 6
According to the California Building Code, reinforcing steel splices in
seismic zones must be located at points of minimum stress. If a column
splice must be made, where should the splice be located?
A) At the mid-height of the column
CALIFORNIA C-50 REINFORCING STEEL
CONTRACTOR LICENSE Exam 2026-2027 BANK
QUESTIONS WITH DETAILED VERIFIED ANSWERS
EXAM QUESTIONS WILL COME FROM HERE (100%
Latest Already Graded A+
Question 1
A structural engineer specifies #8 reinforcing bars with a clear cover of
2 inches for a column footing cast against earth. According to ACI 318,
what is the minimum clear cover required for cast-in-place concrete
cast against earth?
A) 1.5 inches
B) 2 inches
C) 3 inches
D) 4 inches
Answer: C) 3 inches
Explanation: ACI 318 requires a minimum clear cover of 3 inches for
concrete cast against earth and permanently exposed to earth. While
the engineer specified 2 inches, this does not meet the code minimum,
and the contractor must bring this to the engineer's attention. The 2-
,2|Page
inch cover is acceptable for concrete exposed to weather but not for
earth contact.
Question 2
When field bending a #11 reinforcing bar, what is the minimum
allowable inside bend diameter measured from the inside of the bar?
A) 6 bar diameters
B) 8 bar diameters
C) 10 bar diameters
D) 12 bar diameters
Answer: B) 8 bar diameters
Explanation: ACI 318 specifies that for #11 bars and larger, the
minimum inside bend diameter must be at least 8 bar diameters for
standard hooks. This requirement prevents cracking or breaking of the
bar during bending and ensures proper anchorage capacity.
Question 3
The contract documents specify epoxy-coated reinforcing bars. During
delivery, you observe significant damage to the coating on over 20
percent of the bars. What is the proper course of action?
A) Apply a field-applied epoxy patching compound to all damaged areas
B) Reject the entire delivery and request replacement bars
C) Use the bars in non-critical structural locations
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D) Clean the damaged areas and apply zinc-rich primer
Answer: B) Reject the entire delivery and request replacement bars
Explanation: When epoxy coating is damaged on more than 2 percent
of the surface area of a bar, or if damage exceeds 20 percent of a single
bar's coating, the bar must be rejected. Industry standards such as
ASTM A775 require that coating damage be repaired only if it is minor
and isolated. Extensive damage compromises corrosion protection and
structural integrity.
Question 4
A continuous footing requires lap splices for #7 reinforcing bars. The
specified concrete has a compressive strength of 4,000 psi and the bars
are Grade 60. What is the minimum required lap length for tension lap
splices in a Class B splice?
A) 24 inches
B) 30 inches
C) 36 inches
D) 42 inches
Answer: B) 30 inches
Explanation: The development length for #7 Grade 60 bars in 4,000 psi
concrete is approximately 30 inches for a Class B tension lap splice,
which is 1.3 times the development length. The calculation uses the
, 4|Page
formula ld = (0.11 × fy × db) / (√f'c) and then applies the Class B
multiplier, resulting in approximately 30 inches.
Question 5
Which of the following is the correct sequence of operations for placing
reinforcing steel in a deep foundation mat?
A) Place bottom bars, place top bars, place spacers, install chairs
B) Install chairs, place bottom bars, place top bars, tie intersections
C) Place bottom bars, install chairs, place top bars, place spacers
D) Place bottom bars, place spacers, install chairs, place top bars
Answer: D) Place bottom bars, place spacers, install chairs, place top
bars
Explanation: The proper sequence begins with placing bottom
reinforcement directly on the ground or on preplaced spacers to ensure
proper cover. Chairs are then installed to support the top mat of
reinforcement. Top bars are placed last, ensuring the reinforcing cage is
stable and maintains the designed spacing and cover throughout the
concrete placement.
Question 6
According to the California Building Code, reinforcing steel splices in
seismic zones must be located at points of minimum stress. If a column
splice must be made, where should the splice be located?
A) At the mid-height of the column
