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25 questions from the osha construction safety practice test.
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10 questions, graded as you go, with the reason for every answer. No sign-up.
An extension ladder leans against a wall with a working length of 16 feet. How far from the wall should its base be set?
C. 4 feet
A non-self-supporting ladder is set so the base is one-quarter of the working length from the support: 16 / 4 = 4 feet. Setting it at half the length (8 feet) makes the angle so flat the base can slide out.
Reference: 29 CFR 1926.1053(b)(5)(i)
A worker finds a cracked side rail on a portable ladder. What must be done with the ladder?
B. Tag it 'Do Not Use' or otherwise mark it defective and take it out of service
A ladder with a structural defect must be immediately marked as defective, tagged 'Do Not Use' or blocked, and withdrawn from service until repaired. Tape and paint hide the defect without restoring strength.
Reference: 29 CFR 1926.1053(b)(16)
As a general rule, what is the minimum width of a scaffold platform or walkway?
B. 18 inches
Scaffold platforms and walkways must be at least 18 inches wide, with narrower exceptions only for a few scaffold types such as ladder jack and pump jack scaffolds. A single 12-inch plank is not a legal work platform.
Reference: 29 CFR 1926.451(b)(2)