Safety Trained Supervisor Construction (STSC)
Certification Practice Examination Newest 2025–
2026 Edition | Complete Study Guide and Test
Bank with 150 Most Tested Questions and 100%
Verified Answers with Detailed Rationales |
Comprehensive Review Based on the Current BCSP
STSC Exam Blueprint | Tutor Verified Success |
Grade A+ | Instant Download PDF
1. A supervisor observes a worker bypassing a machine guard to increase
production speed. What is the MOST appropriate first action?
A. Ignore the behavior unless an accident occurs
B. Immediately stop the work and correct the unsafe condition
C. Report the worker to OSHA
D. Document the behavior at the end of the shift
✔ Correct Answer: B. Immediately stop the work and correct the unsafe
condition
*Rationale: Immediate intervention prevents exposure to hazard and reinforces
supervisory responsibility for controlling unsafe acts in real time.
2. Which principle BEST describes a strong safety culture on a construction
site?
A. Relying on inspections only
B. Prioritizing production over safety
C. Shared responsibility for identifying and controlling hazards
D. Safety managed only by supervisors
,✔ Correct Answer: C. Shared responsibility for identifying and controlling
hazards
*Rationale: A mature safety culture requires involvement from all workers, not
only leadership or compliance systems.
3. A worker is exposed to silica dust. What is the MOST effective long-term
control?
A. Respirators only
B. Wet cutting methods and local exhaust ventilation
C. Rotating workers frequently
D. Posting warning signs
✔ Correct Answer: B. Wet cutting methods and local exhaust ventilation
*Rationale: Engineering controls eliminate or reduce airborne hazards at the
source, making them more effective than PPE alone.
4. What is the PRIMARY purpose of a Job Hazard Analysis (JHA)?
A. To assign blame after incidents
B. To identify hazards and define control measures before work begins
C. To track worker productivity
D. To replace safety meetings
✔ Correct Answer: B. To identify hazards and define control measures before
work begins
*Rationale: JHAs proactively evaluate tasks to reduce risk before exposure occurs.
5. A near-miss incident occurs on site. What should the supervisor do FIRST?
A. Ignore it because no injury occurred
B. Investigate and document the event
C. Wait to see if it happens again
D. Remove the worker involved permanently
✔ Correct Answer: B. Investigate and document the event
*Rationale: Near-misses provide critical learning opportunities to prevent future
incidents.
, 6. Which behavior BEST demonstrates effective leadership in safety?
A. Delegating all safety responsibilities
B. Leading toolbox talks and modeling safe behavior
C. Focusing only on deadlines
D. Allowing workers to self-monitor
✔ Correct Answer: B. Leading toolbox talks and modeling safe behavior
*Rationale: Supervisors influence safety culture through active participation and
example-setting.
7. Which is the MOST effective method of fall protection when working at
heights?
A. Warning signs
B. Safety monitors only
C. Guardrails or personal fall arrest systems
D. Training only
✔ Correct Answer: C. Guardrails or personal fall arrest systems
*Rationale: Engineering and physical controls are more reliable than
administrative controls or PPE alone.
8. A worker refuses to wear required PPE. What should the supervisor do?
A. Allow the worker to continue if experienced
B. Remove the worker from the task until compliant
C. Reduce PPE requirements
D. Ignore the issue
✔ Correct Answer: B. Remove the worker from the task until compliant
*Rationale: PPE compliance is mandatory for safe task execution and must be
enforced consistently.
9. Which document outlines site-specific safety procedures and hazards?
A. Payroll register
B. Safety and Health Plan
C. Equipment log
D. Work schedule
, ✔ Correct Answer: B. Safety and Health Plan
*Rationale: The safety plan defines site hazards, controls, and responsibilities.
10.What is the main risk of confined spaces?
A. Noise exposure
B. Limited visibility
C. Atmospheric hazards and oxygen deficiency
D. Heat stress only
✔ Correct Answer: C. Atmospheric hazards and oxygen deficiency
*Rationale: Confined spaces often contain toxic gases or insufficient oxygen levels.
11.A worker is injured. What is the supervisor’s FIRST priority?
A. Notify OSHA
B. Complete paperwork
C. Ensure medical attention and secure the scene
D. Investigate immediately
✔ Correct Answer: C. Ensure medical attention and secure the scene
*Rationale: Protecting life and preventing further harm takes priority over
documentation.
12.Which is an example of an unsafe act?
A. Wet concrete surface
B. Missing guardrail
C. Worker not wearing safety glasses
D. Broken ladder rung
✔ Correct Answer: C. Worker not wearing safety glasses
*Rationale: Unsafe acts involve human behavior rather than physical site
conditions.
13.What is the BEST way to control a hazard at its source?
A. PPE
B. Engineering controls
Certification Practice Examination Newest 2025–
2026 Edition | Complete Study Guide and Test
Bank with 150 Most Tested Questions and 100%
Verified Answers with Detailed Rationales |
Comprehensive Review Based on the Current BCSP
STSC Exam Blueprint | Tutor Verified Success |
Grade A+ | Instant Download PDF
1. A supervisor observes a worker bypassing a machine guard to increase
production speed. What is the MOST appropriate first action?
A. Ignore the behavior unless an accident occurs
B. Immediately stop the work and correct the unsafe condition
C. Report the worker to OSHA
D. Document the behavior at the end of the shift
✔ Correct Answer: B. Immediately stop the work and correct the unsafe
condition
*Rationale: Immediate intervention prevents exposure to hazard and reinforces
supervisory responsibility for controlling unsafe acts in real time.
2. Which principle BEST describes a strong safety culture on a construction
site?
A. Relying on inspections only
B. Prioritizing production over safety
C. Shared responsibility for identifying and controlling hazards
D. Safety managed only by supervisors
,✔ Correct Answer: C. Shared responsibility for identifying and controlling
hazards
*Rationale: A mature safety culture requires involvement from all workers, not
only leadership or compliance systems.
3. A worker is exposed to silica dust. What is the MOST effective long-term
control?
A. Respirators only
B. Wet cutting methods and local exhaust ventilation
C. Rotating workers frequently
D. Posting warning signs
✔ Correct Answer: B. Wet cutting methods and local exhaust ventilation
*Rationale: Engineering controls eliminate or reduce airborne hazards at the
source, making them more effective than PPE alone.
4. What is the PRIMARY purpose of a Job Hazard Analysis (JHA)?
A. To assign blame after incidents
B. To identify hazards and define control measures before work begins
C. To track worker productivity
D. To replace safety meetings
✔ Correct Answer: B. To identify hazards and define control measures before
work begins
*Rationale: JHAs proactively evaluate tasks to reduce risk before exposure occurs.
5. A near-miss incident occurs on site. What should the supervisor do FIRST?
A. Ignore it because no injury occurred
B. Investigate and document the event
C. Wait to see if it happens again
D. Remove the worker involved permanently
✔ Correct Answer: B. Investigate and document the event
*Rationale: Near-misses provide critical learning opportunities to prevent future
incidents.
, 6. Which behavior BEST demonstrates effective leadership in safety?
A. Delegating all safety responsibilities
B. Leading toolbox talks and modeling safe behavior
C. Focusing only on deadlines
D. Allowing workers to self-monitor
✔ Correct Answer: B. Leading toolbox talks and modeling safe behavior
*Rationale: Supervisors influence safety culture through active participation and
example-setting.
7. Which is the MOST effective method of fall protection when working at
heights?
A. Warning signs
B. Safety monitors only
C. Guardrails or personal fall arrest systems
D. Training only
✔ Correct Answer: C. Guardrails or personal fall arrest systems
*Rationale: Engineering and physical controls are more reliable than
administrative controls or PPE alone.
8. A worker refuses to wear required PPE. What should the supervisor do?
A. Allow the worker to continue if experienced
B. Remove the worker from the task until compliant
C. Reduce PPE requirements
D. Ignore the issue
✔ Correct Answer: B. Remove the worker from the task until compliant
*Rationale: PPE compliance is mandatory for safe task execution and must be
enforced consistently.
9. Which document outlines site-specific safety procedures and hazards?
A. Payroll register
B. Safety and Health Plan
C. Equipment log
D. Work schedule
, ✔ Correct Answer: B. Safety and Health Plan
*Rationale: The safety plan defines site hazards, controls, and responsibilities.
10.What is the main risk of confined spaces?
A. Noise exposure
B. Limited visibility
C. Atmospheric hazards and oxygen deficiency
D. Heat stress only
✔ Correct Answer: C. Atmospheric hazards and oxygen deficiency
*Rationale: Confined spaces often contain toxic gases or insufficient oxygen levels.
11.A worker is injured. What is the supervisor’s FIRST priority?
A. Notify OSHA
B. Complete paperwork
C. Ensure medical attention and secure the scene
D. Investigate immediately
✔ Correct Answer: C. Ensure medical attention and secure the scene
*Rationale: Protecting life and preventing further harm takes priority over
documentation.
12.Which is an example of an unsafe act?
A. Wet concrete surface
B. Missing guardrail
C. Worker not wearing safety glasses
D. Broken ladder rung
✔ Correct Answer: C. Worker not wearing safety glasses
*Rationale: Unsafe acts involve human behavior rather than physical site
conditions.
13.What is the BEST way to control a hazard at its source?
A. PPE
B. Engineering controls
