Automotive Service Technician Period 1 Practice Exam

Which device is used to determine the presence of dangerous fumes or gases before entering a confined workspace?

Smoke detector Gas detector Thermal imaging camera CO alarm

Correct Answer:

Gas detector

Explanation:

Gas detectors are used to determine the presence of dangerous fumes or gases before entering a confined workspace. They monitor oxygen levels and detect combustible or toxic gases, triggering alarms when conditions are unsafe so entry can be halted or proper precautions taken. In confined spaces, atmospheres can shift quickly, so a gas detector provides real-time alerts for a range of hazards, not just one specific gas. Smoke detectors are for smoke and fire byproducts, not gas concentrations. Thermal imaging cameras look for heat and hot spots, not gas levels. CO alarms specifically monitor carbon monoxide and may miss other dangerous gases or oxygen deficiencies.

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