CPII Safety Protocols 3 — Questions and Answers
Question 1: Under OSHA's Hazard Communication Standard (HazCom), what document must be available to workers who may be exposed to hazardous chemicals at an inspection site?
- Material Purchase Order
- Safety Data Sheet (SDS) (Correct answer)
- Chemical Inventory List
- OSHA 300 Injury Log
Correct answer: Safety Data Sheet (SDS)
OSHA 29 CFR 1910.1200 requires Safety Data Sheets to be readily accessible to workers for every hazardous chemical present at the worksite.
Question 2: An inspector must enter a manhole classified as a permit-required confined space. Which condition would NOT require a permit?
- Presence of an inert gas atmosphere
- Continuous forced-air ventilation eliminates all hazards and testing confirms safe conditions (Correct answer)
- History of engulfment hazard from groundwater
- Possible oxygen-deficient atmosphere due to organic decomposition
Correct answer: Continuous forced-air ventilation eliminates all hazards and testing confirms safe conditions
OSHA allows reclassification of a permit-required space to non-permit status if continuous ventilation eliminates all hazards and atmospheric testing confirms safety.
Question 3: What is the recommended minimum safe distance from the edge of an excavation for stockpiling excavated material?
- 1 foot
- 2 feet (Correct answer)
- 3 feet
- 5 feet
Correct answer: 2 feet
OSHA 29 CFR 1926.651(j)(2) requires excavated material be kept at least 2 feet from the edge of an excavation to prevent surcharge loading that could cause cave-in.
Question 4: Which type of soil classification allows the steepest allowable excavation slope under OSHA standards without additional protective systems?
- Type C
- Type B
- Type A
- Stable rock (Correct answer)
Correct answer: Stable rock
Stable rock requires no slope setback and can be cut vertically; Type A allows ¾:1, Type B 1:1, and Type C 1½:1 maximum slopes.
Question 5: During a pipeline inspection, hydrogen sulfide (H₂S) gas is detected at 15 ppm. What action is required?
- Continue inspection with eye protection added
- Don a supplied-air respirator immediately; IDLH threshold is 50 ppm so 15 ppm is near the action level (Correct answer)
- Evacuate immediately; 15 ppm exceeds the IDLH
- No action; 15 ppm is below any regulatory threshold
Correct answer: Don a supplied-air respirator immediately; IDLH threshold is 50 ppm so 15 ppm is near the action level
NIOSH sets the H₂S ceiling at 10 ppm; OSHA action level considerations and ACGIH TLV-TWA is 1 ppm, so 15 ppm requires respiratory protection and reassessment.
Question 6: What is the primary purpose of a pre-task safety briefing (toolbox talk) conducted before an infrastructure inspection begins?
- To satisfy contractual billing requirements
- To communicate site-specific hazards and controls to all personnel for that day's work (Correct answer)
- To review the project schedule and milestones
- To document worker attendance for payroll
Correct answer: To communicate site-specific hazards and controls to all personnel for that day's work
Toolbox talks ensure all workers are aware of the specific hazards, safety procedures, and emergency contacts relevant to that day's tasks.
Question 7: When using a boom-supported aerial work platform (bucket truck) for bridge inspection, what is the maximum allowable wind speed before operations must cease?
- 15 mph
- 25 mph (Correct answer)
- 35 mph
- 45 mph
Correct answer: 25 mph
Most aerial work platform manufacturers specify a maximum wind speed of 25 mph (22 knots) before operations must stop to prevent tip-over or loss of control.
CPII Safety Protocols 3
Under OSHA's Hazard Communication Standard (HazCom), what document must be available to workers who may be exposed to hazardous chemicals at an inspection site?