STSC Safety Regulations and Standards 5 — Questions and Answers
Question 1: OSHA's Steel Erection standard (29 CFR 1926 Subpart R) requires a site-specific erection plan for structures with how many or more stories?
- 2 stories or 20 feet (Correct answer)
- 4 stories or 40 feet
- 6 stories or 50 feet
- 3 stories or 36 feet
Correct answer: 2 stories or 20 feet
Subpart R requires a site-specific erection plan for structures with 2 or more stories or exceeding 20 feet in height.
Question 2: Which NFPA standard is most directly referenced for electrical safety in construction and governs the use of temporary wiring on job sites?
- NFPA 10
- NFPA 70E
- NFPA 70 (NEC) Article 590 (Correct answer)
- NFPA 101
Correct answer: NFPA 70 (NEC) Article 590
NFPA 70 (NEC) Article 590 specifically governs temporary electrical wiring installations on construction sites.
Question 3: Under OSHA's recordkeeping rule (29 CFR 1904), a work-related injury requiring prescription medication but no days away from work is classified as which type of recordable case?
- First aid case — not recordable
- Days away from work case
- Restricted work or job transfer case
- Other recordable case (Correct answer)
Correct answer: Other recordable case
An injury requiring prescription medication beyond first aid is an 'other recordable case' on the OSHA 300 Log if no days away or restrictions result.
Question 4: The OSHA Silica Standard for construction (29 CFR 1926.1153) requires medical surveillance for workers exposed at or above the Action Level for how long?
- 15 or more days per year
- 25 or more days per year
- 30 or more days per year (Correct answer)
- 45 or more days per year
Correct answer: 30 or more days per year
Medical surveillance is required for workers exposed at or above the Action Level for 30 or more days per year.
Question 5: Which agency publishes the Threshold Limit Values (TLVs) that, while not legally enforceable, are widely used in construction safety programs as exposure guidelines?
- OSHA
- NIOSH
- ACGIH (Correct answer)
- EPA
Correct answer: ACGIH
The American Conference of Governmental Industrial Hygienists (ACGIH) publishes TLVs annually as occupational exposure guidelines.
Question 6: A construction worker is performing hot work near a natural gas line. Which NFPA standard provides the requirements for hot work permits and fire watch procedures?
- NFPA 10
- NFPA 30
- NFPA 51B (Correct answer)
- NFPA 72
Correct answer: NFPA 51B
NFPA 51B, 'Standard for Fire Prevention During Welding, Cutting, and Other Hot Work,' covers hot work permits and fire watch requirements.
Question 7: Under OSHA's Cranes and Derricks in Construction standard (29 CFR 1926.1400), what action must be taken when a crane is not in use and is left unattended?
- Lower all loads to the ground and disable the swing lock
- Secure the load drum and lower the hook block to the ground (Correct answer)
- Place the hook block high enough to clear all personnel and equipment
- Engage the travel lock only if on a slope
Correct answer: Secure the load drum and lower the hook block to the ground
When a crane is unattended, the load must be removed, the drum secured, and the hook block lowered to the ground.
STSC Safety Regulations and Standards 5
OSHA's Steel Erection standard (29 CFR 1926 Subpart R) requires a site-specific erection plan for structures with how many or more stories?