OSHA 510: Construction Standards

27) The steepest slope (with no other protection) that is allowed for type B soil is? 1/2 to 1. 3/4 to 1. 1 to 1. 1.5 to 1. 28) A trench must be designed by a registered professional engineer when its depth is more than ____ feet. 8 10 15 20 29) Prior to permitting employees to start demolition operations, an engineering survey shall be made by ... ................
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