Heat Stress: Medical Screening and Controls for Hot Work
CHST written lesson, 16 min read. CHST Domain 1: Hazard and Risk Identification and Control
Written with AI help from the rules it covers, then fact-checked against them. Study aid, not site-specific safety advice. The official rule controls.
What you'll learn
- "Distinguish heat stress, heat strain and acclimatization"
- "Tell the recommended alert limit (RAL) from the recommended exposure limit (REL) and name who each protects"
- "Calculate indoor and outdoor WBGT from field readings"
- "Rank engineering and administrative controls for hot work"
- "Describe the medical monitoring and surveillance steps NIOSH recommends"
- "List what the healthcare provider's written heat report contains"
- "Judge cooling vests, minor heat pathways, hydration and screening instruments"
What this lesson covers
This lesson explains how the National Institute for Occupational Safety and Health (NIOSH) frames occupational heat stress: the difference between heat stress and heat strain, which limit applies to which worker, how wet bulb globe temperature (WBGT) is calculated, and which controls come first. These are the points the exam tests and the ones that drive real decisions on a hot job.
This lesson is included with a pass
Written lessons come with every CHST pass, along with the video lessons, the question bank, mocks and the tutor. $80 per exam for 6 months, or $143 for all three for 12 months.
Try the free heat stress: medical screening and controls for hot work practice questions