AL Tunnel Practice Questions - Alabama Tunnel Contractor Examination Exam

Access More Questions

A rapid excavation machine is used in an operation classified as potentially gassy. Under OSHA 1926.800, where must the continuous automatic flammable-gas monitoring equipment sample, and what must happen at 20 percent or more of the LEL?

At the heading, on the rib, and in the return air duct, with the monitor signaling the heading and shutting down electric power except acceptable pumping and ventilation A single monitor at the surface office that only logs data overnight Monitors only on the muck skip, with no power shutdown at any LEL No monitors if the machine is electric

Correct Answer:

At the heading, on the rib, and in the return air duct, with the monitor signaling the heading and shutting down electric power except acceptable pumping and ventilation

Access more questions from this quiz

Continue to AL Tunnel Practice Questions - Alabama Tunnel Contractor Examination Exam for more practice questions and the full quiz experience.

Access More Questions