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OSHA 10-Hour Construction Review practice questions

229 free questions with answers and explanations.

Practice test
  1. 51.A construction worker is diagnosed with Raynaud's phenomenon, a condition that causes blood vessels in the fingers and toes to narrow when exposed to cold. This worker frequently works in unheated areas during winter. What type of cold stress-related injury is most directly associated with the symptoms of Raynaud's phenomenon?Health Hazards in Construction
  2. 52.A construction worker is operating a jackhammer for several hours daily without hearing protection. The noise level is consistently measured at 95 dBA. According to OSHA standards, what is the maximum permissible exposure time for this noise level without hearing protection?Health Hazards in Construction
  3. 53.Which of the following is the primary purpose of a Safety Data Sheet (SDS) for hazardous chemicals on a construction site?Health Hazards in Construction
  4. 54.A construction worker is exposed to noise levels repeatedly exceeding 90 dBA over an 8-hour workday without hearing protection. According to OSHA, what is the maximum permissible exposure limit (PEL) for noise averaged over an 8-hour workday?Health Hazards in Construction
  5. 55.A worker is preparing to use a powder-actuated tool to fasten a sill plate to concrete. Which of the following is a mandatory step before operating the tool?Tools - Hand and Power
  6. 56.A worker is operating a hydraulic press, and the pressure gauge indicates a sudden and significant drop while under load. What is the most immediate and appropriate safety response?Tools - Hand and Power
  7. 57.A construction worker is using a hydraulic jack to lift a heavy steel beam. After the beam has been raised to the desired height, what is the most critical next step to ensure worker safety according to OSHA standards?Tools - Hand and Power
  8. 58.A construction worker is performing tasks involving welding and cutting in an enclosed space. The worker experiences dizziness, nausea, and shortness of breath, and their skin appears bluish. These symptoms are most indicative of which health hazard?Health Hazards in Construction
  9. 59.A construction worker is handling a product labeled with a GHS pictogram showing a skull and crossbones. What does this pictogram primarily indicate?Health Hazards in Construction
  10. 60.An excavation project requires workers to enter a trench that is 6 feet deep. The soil type has been classified as Type B. According to OSHA, what is the maximum allowable slope ratio for the sides of this trench if shoring is not used?Focus Four Hazards
  11. 61.A worker is operating a backhoe near an excavation. To prevent 'struck-by' incidents from the swinging counterweight or bucket, what is the most effective safety measure to implement for other workers in the vicinity?Focus Four Hazards
  12. 62.A worker is installing pre-fabricated wall panels on a multi-story building. The panels are being lifted by a crane. Which of the following is considered a 'leading edge' that would require fall protection for workers installing them?Focus Four Hazards
  13. 63.A worker is preparing to perform maintenance on a large industrial conveyor system. The system has multiple energy sources, including electrical, hydraulic, and pneumatic. To prevent unexpected startup or release of energy, which procedure must be implemented before starting work?Focus Four Hazards
  14. 64.A worker is performing maintenance inside a large, enclosed storage tank that previously contained chemicals. Atmospheric testing has been conducted, but the tank's configuration makes natural ventilation poor. Which of the following is an essential control measure to ensure continuous breathable air for the worker inside this confined space?Focus Four Hazards
  15. 65.During demolition work, a crane is used to hoist a large, heavy concrete slab. As the slab is being lifted, it begins to swing unpredictably due to wind. What is the immediate priority for the crane operator?Focus Four Hazards
  16. 66.A worker is installing a new light fixture on a ceiling. The worker is using a portable ladder that extends 3 feet above the upper landing surface. The total height from the base of the ladder to the upper landing is 16 feet. What is the maximum vertical height the worker can safely reach while maintaining the proper working angle for the ladder?Focus Four Hazards
  17. 67.A construction worker is assigned to clean out a large, enclosed tank that was previously used to store chemicals. The tank has limited entry and exit points, poor ventilation, and the potential for hazardous atmospheres. What type of space is this considered under OSHA regulations?Focus Four Hazards
  18. 68.A construction crew is working on a new building where overhead power lines are present. The lines are energized at 13.8 kV. What is the minimum safe clearance distance required between any part of the equipment (e.g., a crane boom) and these power lines?Focus Four Hazards
  19. 69.During demolition work, a crane is used to hoist a large, heavy concrete slab. As the slab is being lifted, it begins to swing uncontrollably. What is the most critical action the crane operator should take immediately to regain control and prevent a 'struck-by' incident?Focus Four Hazards
  20. 70.A worker is using a portable electric circular saw to cut lumber on a construction site. The saw's lower blade guard appears to be stuck in the open position, exposing the blade. What is the immediate action the worker should take?Focus Four Hazards
  21. 71.A crew is performing demolition work on a multi-story building. As large sections of concrete are removed, workers are exposed to open-sided floors that are 15 feet above the ground. Which of the following fall protection methods is most appropriate and required by OSHA for these exposed edges?Focus Four Hazards
  22. 72.A worker is preparing to enter a confined space, a large storage tank, for cleaning. The tank previously contained a flammable liquid and has limited ventilation. Which of the following is the MOST critical initial step before any worker enters the tank?Focus Four Hazards
  23. 73.A trench is being excavated for a utility line. The trench is 7 feet deep, 3 feet wide, and 50 feet long. Soil analysis indicates the soil is Type B. What is the maximum vertical side of the trench that can remain unsloped or unshored before protective systems are required for Type B soil?Focus Four Hazards
  24. 74.A worker is performing work on a flat roof with an unprotected edge that is 7 feet above the lower level. According to OSHA standards, what specific fall protection threshold does this height trigger?Focus Four Hazards
  25. 75.A worker is installing siding on the second story of a residential building, approximately 15 feet above the ground. They are using an extension ladder to access the work area. What is the minimum required distance the top of the ladder must extend above the landing surface?Focus Four Hazards
  26. 76.A worker is using a portable circular saw on a construction site. Which of the following is an essential safety requirement for operating this tool?Focus Four Hazards
  27. 77.A construction crew is performing excavation work for a new building foundation. The excavation is 6 feet deep, 10 feet wide, and 20 feet long. Soil analysis indicates the soil is Type C. What is the maximum allowable slope for the sides of this excavation?Focus Four Hazards
  28. 78.A construction worker is operating a powered industrial truck (forklift) on a job site. The worker experiences a sudden loss of control, causing the forklift to tip over. Which of the following is the most immediate and critical action the operator should take?Focus Four Hazards
  29. 79.A worker is operating a crane on a construction site. The crane is positioned near energized overhead power lines rated at 300 kilovolts (kV). According to OSHA standards, what is the minimum safe working clearance that must be maintained between the crane and these power lines?Focus Four Hazards
  30. 80.A worker is working on a scaffold at a height of 15 feet. To prevent objects from falling and striking workers below, what protective measure is most appropriate and often required by OSHA for the scaffold platform?Focus Four Hazards
  31. 81.A worker is performing maintenance on a piece of heavy machinery with multiple energy sources. Before beginning work, the worker applies a lock and tag to the main power switch. However, the machine also has hydraulic and pneumatic systems. What critical step has the worker missed according to lockout/tagout procedures?Focus Four Hazards
  32. 82.A construction crew is performing excavation work for a new building foundation. The excavation is 8 feet deep and 4 feet wide. The soil type has been classified as Type B, granular soil with some cohesion. What is the maximum allowable slope ratio for the sides of this excavation?Focus Four Hazards
  33. 83.A crane is being used to hoist a heavy steel beam on a construction site. During the lift, the crane operator notices that the load is swinging uncontrollably due to wind. What is the MOST immediate action the crane operator should take to ensure safety?Focus Four Hazards
  34. 84.A construction worker is assigned to clean out a large, enclosed tank that was previously used to store chemicals. The tank has limited entry and exit points, poor ventilation, and a potential for hazardous fumes. Before entry, what must be established for this work area?Focus Four Hazards
  35. 85.A worker is operating a compact excavator in a confined work area. What is the most effective way to prevent 'struck-by' incidents with personnel working near the excavator's swing radius?Focus Four Hazards
  36. 86.A worker is performing maintenance on a large industrial mixer. To prevent accidental startup and entanglement, the worker correctly applies lockout/tagout procedures. Which of the following is the primary purpose of applying a tagout device in addition to a lockout device?Focus Four Hazards
  37. 87.A worker is preparing to enter a trench that is 6 feet deep and 4 feet wide for utility installation. There are no indications of unstable soil or other immediate hazards. What is the minimum depth at which a protective system (sloping, shoring, or shielding) is generally required for trenches?Focus Four Hazards
  38. 88.A worker is installing pre-fabricated wall panels on a multi-story building. As the panels are being lifted into place, they create an unprotected edge where a fall hazard exists. What is this type of fall hazard specifically referred to as by OSHA?Focus Four Hazards
  39. 89.A worker is operating a backhoe near an excavation. To prevent 'struck-by' incidents from the swinging bucket, what is the minimum distance that other employees are generally required to maintain from the operating range of the equipment?Focus Four Hazards
  40. 90.During a construction project, a worker is operating a forklift near an overhead power line. The power line is not de-energized and there is no protective covering. What is the minimum clearance distance that must be maintained between any part of the forklift and the power line if the line's voltage is 50 kV?Focus Four Hazards
  41. 91.A trench is being excavated for a utility line. The trench is 5 feet deep, 3 feet wide, and 20 feet long. According to OSHA, what is the minimum distance that excavated material (spoil pile) must be kept from the edge of the trench?Focus Four Hazards
  42. 92.A construction crew is performing trenching operations for a new utility line. The trench is 6 feet deep, 3 feet wide, and 20 feet long in Type B soil. What is the minimum horizontal distance from the edge of the trench that excavated material must be placed?Focus Four Hazards
  43. 93.A worker is using a portable electric drill on a construction site. The drill's power cord has a broken ground prong. What is the most significant electrocution hazard associated with using this tool in its current condition?Focus Four Hazards
  44. 94.A worker is using a portable electric circular saw to cut lumber on a construction site. What is the primary safety feature designed to protect the worker from accidental contact with the rotating blade when the saw is not in use or resting?Focus Four Hazards
  45. 95.A worker is installing siding on the second story of a residential building, approximately 16 feet above the ground. The worker is using an extension ladder to access the work area. How far must the top of the ladder extend above the upper landing surface?Focus Four Hazards
  46. 96.A construction crew is using a scaffold to perform work on the exterior of a building. The scaffold is 18 feet high, and workers are using personal fall arrest systems. Which component of the fall arrest system is designed to absorb the kinetic energy generated during a fall, thereby reducing the impact force on the worker's body?Focus Four Hazards
  47. 97.A construction crew is working near overhead power lines that are energized and rated at 35 kV. According to OSHA, what is the minimum safe clearance distance that must be maintained between the equipment and the power lines?Focus Four Hazards
  48. 98.A worker is working on a flat roof with an unprotected edge that is 8 feet above the lower level. The worker is performing tasks that take them within 6 feet of the edge. Which of the following fall protection methods is acceptable according to OSHA for this scenario?Focus Four Hazards
  49. 99.A worker is operating a backhoe on a construction site. To prevent 'struck-by' incidents from the machine's swinging superstructure, what is the minimum safe distance that other workers should maintain from the operating equipment?Focus Four Hazards
  50. 100.A worker is performing maintenance on a piece of heavy machinery with multiple energy sources (electrical, hydraulic, pneumatic). Before beginning work, what is the MOST critical action the worker must take to prevent accidental startup or release of stored energy?Focus Four Hazards