CO Structural Steel Contractor Exam
Practice Questions And Correct
Answers (Verified Answers) Plus
Rationale 2027 Q&A| Instant
Download Pdf.
1. Which property of structural steel is most directly used to
determine the maximum stress a member can sustain before
permanent deformation begins?
A. Modulus of elasticity
B. Yield strength
C. Density
D. Coefficient of thermal expansion
Yield strength is the stress at which structural steel begins to undergo
permanent plastic deformation, making it a critical design value for
determining member capacity.
2. Which steel designation is commonly associated with a structural
carbon steel having a minimum specified yield strength of
approximately 36 ksi?
A. ASTM A53
B. ASTM A500 Grade B
,C. ASTM A36
D. ASTM A108
ASTM A36 is a widely used structural carbon steel specification with a
nominal minimum yield strength of 36 ksi for typical structural
applications.
3. What is the primary purpose of a shop drawing for structural steel?
A. To replace the structural engineer's design calculations
B. To establish the project's final tax assessment
C. To provide detailed fabrication and erection information for steel
components
D. To determine the contractor's insurance premium
Shop drawings communicate dimensions, connections, member
identification, fabrication details, and other information needed to
manufacture and erect structural steel accurately.
4. During steel erection, what is the primary purpose of temporary
bracing?
A. To increase the permanent dead load
B. To improve the appearance of the structure
C. To maintain stability until the permanent structural system is
complete
D. To eliminate the need for permanent connections
,Temporary bracing prevents instability during erection when the
structure may not yet have sufficient completed framing or connections
to resist construction-stage loads.
5. Which type of bolt is specifically manufactured and commonly used
as a high-strength structural fastener?
A. Wood screw
B. Machine screw
C. ASTM F3125 structural bolt
D. Drywall screw
ASTM F3125 covers high-strength structural bolts commonly used in
steel construction, including grades and assemblies suitable for
structural connections.
6. What does the term "pretensioned bolt" mean?
A. The bolt is installed without tightening
B. The bolt is welded after installation
C. The bolt is tightened to a specified minimum tension before the
connection is placed into service
D. The bolt is intentionally left loose to accommodate movement
Pretensioning develops a specified tensile force in the bolt, clamping the
connected steel elements together and improving connection
performance.
7. Which condition is most likely to cause bolt pretension to be
inadequate?
, A. Correct bolt diameter
B. Properly calibrated installation equipment
C. Improper tightening procedure
D. Correct washer placement
An incorrect tightening method can fail to develop the required bolt
tension, potentially reducing the capacity or performance of the
structural connection.
8. What is the main purpose of a washer beneath a structural bolt
head or nut when required by the connection specification?
A. To increase the steel member's yield strength
B. To replace the nut
C. To distribute bearing forces and protect the connected surface as
specified
D. To prevent all thermal expansion
Washers can distribute contact forces and provide the bearing surface
required by the connection design and applicable specifications.
9. Which welding process uses a continuously fed consumable wire
electrode and shielding gas?
A. SMAW
B. SAW
C. GMAW
D. GTAW
Practice Questions And Correct
Answers (Verified Answers) Plus
Rationale 2027 Q&A| Instant
Download Pdf.
1. Which property of structural steel is most directly used to
determine the maximum stress a member can sustain before
permanent deformation begins?
A. Modulus of elasticity
B. Yield strength
C. Density
D. Coefficient of thermal expansion
Yield strength is the stress at which structural steel begins to undergo
permanent plastic deformation, making it a critical design value for
determining member capacity.
2. Which steel designation is commonly associated with a structural
carbon steel having a minimum specified yield strength of
approximately 36 ksi?
A. ASTM A53
B. ASTM A500 Grade B
,C. ASTM A36
D. ASTM A108
ASTM A36 is a widely used structural carbon steel specification with a
nominal minimum yield strength of 36 ksi for typical structural
applications.
3. What is the primary purpose of a shop drawing for structural steel?
A. To replace the structural engineer's design calculations
B. To establish the project's final tax assessment
C. To provide detailed fabrication and erection information for steel
components
D. To determine the contractor's insurance premium
Shop drawings communicate dimensions, connections, member
identification, fabrication details, and other information needed to
manufacture and erect structural steel accurately.
4. During steel erection, what is the primary purpose of temporary
bracing?
A. To increase the permanent dead load
B. To improve the appearance of the structure
C. To maintain stability until the permanent structural system is
complete
D. To eliminate the need for permanent connections
,Temporary bracing prevents instability during erection when the
structure may not yet have sufficient completed framing or connections
to resist construction-stage loads.
5. Which type of bolt is specifically manufactured and commonly used
as a high-strength structural fastener?
A. Wood screw
B. Machine screw
C. ASTM F3125 structural bolt
D. Drywall screw
ASTM F3125 covers high-strength structural bolts commonly used in
steel construction, including grades and assemblies suitable for
structural connections.
6. What does the term "pretensioned bolt" mean?
A. The bolt is installed without tightening
B. The bolt is welded after installation
C. The bolt is tightened to a specified minimum tension before the
connection is placed into service
D. The bolt is intentionally left loose to accommodate movement
Pretensioning develops a specified tensile force in the bolt, clamping the
connected steel elements together and improving connection
performance.
7. Which condition is most likely to cause bolt pretension to be
inadequate?
, A. Correct bolt diameter
B. Properly calibrated installation equipment
C. Improper tightening procedure
D. Correct washer placement
An incorrect tightening method can fail to develop the required bolt
tension, potentially reducing the capacity or performance of the
structural connection.
8. What is the main purpose of a washer beneath a structural bolt
head or nut when required by the connection specification?
A. To increase the steel member's yield strength
B. To replace the nut
C. To distribute bearing forces and protect the connected surface as
specified
D. To prevent all thermal expansion
Washers can distribute contact forces and provide the bearing surface
required by the connection design and applicable specifications.
9. Which welding process uses a continuously fed consumable wire
electrode and shielding gas?
A. SMAW
B. SAW
C. GMAW
D. GTAW
