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These 10 free CSS questions are organized by exam domain, so you can see how each part of the Certified Safety Supervisor blueprint is tested. Reveal the answer and explanation under each question.
At the annual business review, a manager reports that fleet safety improved because preventable crashes fell from 12 to 9. Mileage also fell, from 4 million to 2 million, and the crash definition and reporting completeness were unchanged. Which statement correctly evaluates crash frequency?
Correct answer: A - It worsened: the rate increased by 50%, from 3.0 to 4.5 crashes per million miles.
Urgent care cleans a loader's minor work-related hand cut, applies adhesive wound-closure strips, and gives a tetanus booster. There are no sutures, prescription medication, significant diagnosis, or loss of consciousness. The employee has no days away or work restrictions, and the employer must keep OSHA injury records. How should these facts be handled for federal OSHA recordkeeping?
Correct answer: C - Keep an internal incident record; no OSHA 300 entry is required.
Eleven hours after a crash, a tractor-trailer driver receives the first citation for a moving violation arising from it. The crash occurred on a public road in interstate commerce; another vehicle had disabling damage and was towed away. Nobody died or received treatment away from the scene. The driver is subject to DOT testing, remains available, and has not been tested. What does the federal post-accident testing rule require now?
Correct answer: B - Arrange the drug test promptly; the post-accident alcohol-testing window has closed.
During unloading in a hot trailer, a worker becomes confused, slurs words, and cannot follow simple instructions. The worker is sweating heavily. A coworker argues that heat stroke is unlikely because the worker is still sweating. Which immediate response is warranted?
Correct answer: A - Call 911 and begin rapid cooling; stay with the worker and do not give oral fluids.
A recruiter has a verified negative pre-employment drug result for a CDL applicant and a copy of the applicant's previous employer's limited Clearinghouse query from yesterday showing no records found. All other qualification checks are complete. The hiring carrier has not queried the Clearinghouse. What remains necessary before it assigns this driver a safety-sensitive function?
Correct answer: B - Conduct its own full pre-employment query with the driver's specific electronic consent.
Exit interviews from one terminal repeatedly cite missed home time among drivers leaving in their first 90 days. Payroll and equipment records reveal no meaningful differences from terminals with better retention. Recruiting messages promise weekly home time, but route plans require every-other-week returns. The most targeted retention intervention is to:
Correct answer: D - Align recruiting commitments with dispatch capability and verify that promised home time is delivered.
Eight months after a satisfactory forklift performance evaluation, an operator narrowly misses a pedestrian while reversing at a newly arranged loading dock. The investigation identifies a gap in the operator's use of the changed traffic pattern. The truck is serviceable, and the dock's physical hazards have been addressed. Which federal training obligation is triggered by this event?
Correct answer: D - Provide refresher training on the relevant hazards and evaluate its effectiveness in workplace operation.
For nine consecutive weeks, a terminal's inspection-defect rate plots above the center line of an established, appropriately constructed control chart. Every point remains within the three-sigma control limits. The terminal uses the Western Electric signal rules, and the inspection method has not changed. How should the safety supervisor interpret this pattern?
Correct answer: A - It signals a process shift that warrants investigation, despite all points being within the limits.
The treating clinician releases an injured loader to modified duty for the next ten days: no lifting over 8 pounds, no overhead reaching, and no more than six hours of work per day. The employer has appropriate work available and no other restriction prevents assignment. Which proposed arrangement respects the release while supporting early return to work?
Correct answer: C - A four-hour scanning assignment using 2-pound document trays below shoulder height, with a scheduled review.
Dispatch is planning a two-hour leg for an interstate property-carrying driver who has driven a total of 7 hours 40 minutes today and has just spent 40 consecutive minutes unloading, logged on duty and not driving. The driver is alert and has enough time for the leg under the 11-hour driving, 14-hour window, and weekly limits. No exception is being used. Regarding the federal 30-minute driving-break requirement, the driver may:
Correct answer: D - Complete the leg; 40 uninterrupted minutes of on-duty unloading satisfy the break requirement.
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