NASCLA Accredited Examination for
Commercial General Building Contractors
Question Answers) Plus Rationales 2026 Q&A
|Instant Download Pdf And Correct Answers
(Verified
1. Which document establishes the contractual scope of work
between owner and contractor?
A. Project manual
B. Drawings
C. Contract
D. Addenda
Rationale: The contract (agreement) defines the legal obligations,
scope, and terms between owner and contractor.
2. Who is primarily responsible for jobsite safety compliance under
OSHA?
A. Subcontractors only
B. Employer/contractor
C. Building inspector
D. Architect
Rationale: Employers (contractors) are responsible for providing a
safe workplace and complying with OSHA regulations.
3. The purpose of a bid bond is to:
A. Guarantee performance of the work
B. Replace contractor insurance
C. Guarantee the bidder will enter into contract if awarded
, D. Cover payment to subcontractors
Rationale: A bid bond assures the owner the bidder will sign
contract and provide required bonds if awarded.
4. Which schedule method shows activities in calendar time along a
horizontal time scale?
A. Critical Path Method (CPM) table
B. Gantt chart (bar chart)
C. PERT matrix
D. Responsibility matrix
Rationale: A Gantt chart (bar chart) displays activities as bars
along calendar time.
5. During excavation, an unstable trench deeper than 5 feet requires:
A. Additional lighting
B. Shoring or sloping/protective system
C. Increased ventilation
D. Deeper footings
Rationale: OSHA requires protective systems (shoring, sloping,
benching) for trenches over certain depths to prevent collapse.
6. What does "addenda" refer to in bidding documents?
A. Supplemental insurance forms
B. Written changes or clarifications before contract execution
C. Final payment release
D. Work change directives after start
Rationale: Addenda are issued during bidding to modify or clarify
documents before contract award.
7. A performance bond protects the:
A. Owner’s property from damage
, B. Owner against contractor default in performance
C. Contractor against owner nonpayment
D. Subcontractor against payment delays
Rationale: Performance bonds ensure the contractor completes
work according to contract terms.
8. The Critical Path Method (CPM) determines:
A. Project cost only
B. Resource allocation only
C. Longest sequence of activities determining project duration
D. Quality control checkpoints
Rationale: CPM identifies the longest path of dependent activities
that sets project completion time.
9. Which type of specification lists materials and products by
proprietary name?
A. Performance specification
B. Proprietary (closed) specification
C. Prescriptive specification
D. Descriptive specification
Rationale: Proprietary specifications require specific brand or
manufacturer products.
10. When a change order increases contract time, the contractor
should:
A. Start new work without documentation
B. Wait until project completion to claim time
C. Submit a written change order request documenting
entitlement
D. Stop work until owner issues payment
Commercial General Building Contractors
Question Answers) Plus Rationales 2026 Q&A
|Instant Download Pdf And Correct Answers
(Verified
1. Which document establishes the contractual scope of work
between owner and contractor?
A. Project manual
B. Drawings
C. Contract
D. Addenda
Rationale: The contract (agreement) defines the legal obligations,
scope, and terms between owner and contractor.
2. Who is primarily responsible for jobsite safety compliance under
OSHA?
A. Subcontractors only
B. Employer/contractor
C. Building inspector
D. Architect
Rationale: Employers (contractors) are responsible for providing a
safe workplace and complying with OSHA regulations.
3. The purpose of a bid bond is to:
A. Guarantee performance of the work
B. Replace contractor insurance
C. Guarantee the bidder will enter into contract if awarded
, D. Cover payment to subcontractors
Rationale: A bid bond assures the owner the bidder will sign
contract and provide required bonds if awarded.
4. Which schedule method shows activities in calendar time along a
horizontal time scale?
A. Critical Path Method (CPM) table
B. Gantt chart (bar chart)
C. PERT matrix
D. Responsibility matrix
Rationale: A Gantt chart (bar chart) displays activities as bars
along calendar time.
5. During excavation, an unstable trench deeper than 5 feet requires:
A. Additional lighting
B. Shoring or sloping/protective system
C. Increased ventilation
D. Deeper footings
Rationale: OSHA requires protective systems (shoring, sloping,
benching) for trenches over certain depths to prevent collapse.
6. What does "addenda" refer to in bidding documents?
A. Supplemental insurance forms
B. Written changes or clarifications before contract execution
C. Final payment release
D. Work change directives after start
Rationale: Addenda are issued during bidding to modify or clarify
documents before contract award.
7. A performance bond protects the:
A. Owner’s property from damage
, B. Owner against contractor default in performance
C. Contractor against owner nonpayment
D. Subcontractor against payment delays
Rationale: Performance bonds ensure the contractor completes
work according to contract terms.
8. The Critical Path Method (CPM) determines:
A. Project cost only
B. Resource allocation only
C. Longest sequence of activities determining project duration
D. Quality control checkpoints
Rationale: CPM identifies the longest path of dependent activities
that sets project completion time.
9. Which type of specification lists materials and products by
proprietary name?
A. Performance specification
B. Proprietary (closed) specification
C. Prescriptive specification
D. Descriptive specification
Rationale: Proprietary specifications require specific brand or
manufacturer products.
10. When a change order increases contract time, the contractor
should:
A. Start new work without documentation
B. Wait until project completion to claim time
C. Submit a written change order request documenting
entitlement
D. Stop work until owner issues payment
