CHST certification: requirements, exam and upkeep

A crew will shovel out a thick layer of pigeon droppings from an old bell tower before restoration. Which disease is the PRIMARY airborne concern?

Pick the option you would mark on test day. The choice stays fixed, and every option then explains itself.

1. Tetanus

   Tetanus enters through puncture wounds and cuts, so it matters for nail injuries but is not an airborne hazard from disturbed droppings.
2. Histoplasmosis

   Histoplasma, the fungus behind histoplasmosis, grows in thick bird and bat droppings, and shoveling dry guano lifts its spores into the crew's breathing zone; wetting, respirators and disposable coveralls are the usual controls.
3. Hantavirus

   Hantavirus is carried by rodents, mainly deer mice, so it fits a mouse-infested crawl space rather than a pigeon roost; not all animal droppings carry the same hazard.
4. Legionellosis

   Legionellosis, or Legionnaires' disease, spreads through mist from contaminated water systems such as cooling towers, not through dust from droppings.

After a fatal fall, several crew members who witnessed it are visibly shaken. What is the BEST immediate support?

1. Psychological first aid and access to counseling

   Psychological first aid gives calm, practical support and lets each witness talk if they choose, and a counseling or assistance-program referral covers anyone who struggles in the weeks after.
2. Sending everyone back to work at once for routine

   Sending shaken workers straight back to hazardous tasks ignores their distress and the higher error rate of people who are distracted by what they just saw.
3. Telling the crew not to discuss the incident

   Telling witnesses not to discuss the incident is a gag order that isolates them and feeds rumor, and it conflicts with their right to speak with investigators.
4. Mandatory group retelling of the event in detail

   Making every witness relive the fatality in detail can deepen distress for some of them; current practice keeps any group debrief voluntary.

A company program assigns each foreman a weekly crew inspection, but audits show that half are skipped and nothing follows. Which management-system element is weakest?

1. Emergency planning

   Emergency planning covers response to fires, injuries and evacuations and has no bearing on whether routine inspections get done.
2. Hazard identification methods

   The weekly inspection is itself the hazard identification method, and it would work if done; the audit shows it is skipped, a failure of follow-through rather than of the method.
3. Accountability for duties

   The inspection duty is assigned, but nobody checks whether it happens or acts when it does not; that missing follow-through is the accountability element of the system.
4. Worker training content

   Nothing in the audit concerns what workers were taught; the gap lies with foremen who face no consequence for skipping an assigned task.

A worker repeatedly ignores a known safety rule despite previous coaching. What is the appropriate next step?

1. Retrain the entire crew on the safety rule

   The crew, and this worker, already know the safety rule; retraining the entire crew burdens those who comply and does nothing about one person's repeated choice.
2. Fire the worker immediately without records

   Firing the worker at once with no records skips the progressive steps and exposes the employer to claims of unfair or retaliatory treatment.
3. Ignore it to protect crew morale

   Letting a repeated violation slide tells the crew the rule is optional, which harms morale and safety more than enforcing it.
4. Apply progressive discipline consistently

   Coaching has already failed, so the next step is the documented, escalating discipline the company applies the same way to everyone; consistency keeps it fair and credible.