Workers enter a trench with vertical sides and no protective system where cave-in protection is required. What is missing?
Correct Answer
C) Protective system.
Excavations need required protective systems or equivalent measures against cave-in hazards.
Why This Is the Correct Answer
Excavations need required protective systems or equivalent measures against cave-in hazards.
Why the Other Options Are Wrong
Option A: Have the trench rechecked.
Have the trench rechecked. may relate to another site control, but it does not remove or guard the excavation protection exposure being tested.
Option B: Keep spoil back from the edge.
Keep spoil back from the edge. may relate to another site control, but it does not remove or guard the excavation protection exposure being tested.
Option D: Move spoil back.
Move spoil back. may relate to another site control, but it does not remove or guard the excavation protection exposure being tested.
Memory Technique
If Checking Trench can still reach the worker, the control is decoration.
Reference Hint
Study anchor (closed-book): memorize Excavation protection from Cal/OSHA Title 8 Construction Safety Orders; CSLB B General Building. / Cal/OSHA Title 8 excavation excavation protections; know the rule or calculation trigger without relying on exam-room lookup.
More Class B Trade Questions
A 2-inch horizontal sanitary branch must be installed at 1/4 inch fall per foot. What total fall is needed over a 24-foot run?
A 4-inch building drain is laid out with a required 1/8 inch fall per foot. What fall is required across 40 feet?
A rooftop unit schedule shows 3 tons of cooling. Using 12,000 Btu per hour per ton, what cooling capacity is this?
A pump motor is listed as 2 horsepower, and the coordination table asks for watts. Using 746 watts per horsepower, what is the approximate motor power?
A slab is 30 feet long, 18 feet wide, and 4 inches thick. How many cubic yards of concrete are needed before waste?
A footing is 80 feet long, 2 feet wide, and 12 inches deep. How many cubic yards of concrete are required before waste?
A patio subgrade must drain at 2 percent away from the building for 20 feet. What total drop is required?
A building pad needs 150 compacted cubic yards of fill. If the borrow material shrinks 10 percent after compaction, about how many loose cubic yards should be hauled in?
A roofing estimate shows 2,850 square feet of roof area. How many roofing squares is that?
A waterproof deck surface is 14 feet deep and must slope 1/4 inch per foot to the drain. What vertical fall is needed?