AL Tunnel Practice Questions - Alabama Tunnel Contractor Examination Exam

For an excavation less than 20 feet deep in Type C soil, what is the maximum allowable slope in OSHA Subpart P Appendix B?

Vertical (90 degrees) 3/4 horizontal to 1 vertical (53 degrees) 1-1/2 horizontal to 1 vertical (34 degrees) 1/2 horizontal to 1 vertical (63 degrees)

1-1/2 horizontal to 1 vertical (34 degrees)

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