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Walking working surfaces practice questions

25 questions from the osha general industry safety practice test.

Walking working surfaces practice test

10 questions, graded as you go, with the reason for every answer. No sign-up.

What this covers

Sample questions

What is the required height of the top rail of a guardrail system above the walking-working surface?

  1. 36 inches, plus or minus 3 inches
  2. 48 inches, plus or minus 3 inches
  3. 30 inches, plus or minus 3 inches
  4. 42 inches, plus or minus 3 inches
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D. 42 inches, plus or minus 3 inches

The top edge of a guardrail must be 42 inches high, give or take 3 inches, so anything from 39 to 45 inches is acceptable. Thirty-six inches is within the range for a stair handrail, not a guardrail top rail.

Reference: 29 CFR 1910.29(b)(1)

What is the minimum vertical height of a toeboard used for falling object protection?

  1. 12 inches
  2. 3.5 inches
  3. 2 inches
  4. 6 inches
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B. 3.5 inches

A toeboard must be at least 3.5 inches high, with no more than a quarter-inch gap at the bottom, and strong enough to take a 50-pound force. Two inches is the size at which an opening in a floor counts as a hole, not a toeboard dimension.

Reference: 29 CFR 1910.29(k)(1)(ii)

Under the walking-working surfaces rule, an opening in a floor or roof is a 'hole' when its least dimension is at least how large?

  1. 6 inches
  2. 12 inches
  3. 19 inches
  4. 2 inches
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D. 2 inches

A hole is a gap or open space in a floor, roof or similar surface that is at least 2 inches in its least dimension. Even small holes must be dealt with because tools can fall through them and feet can be caught in them.

Reference: 29 CFR 1910.21(b)

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