STSC Ergonomics in Construction

Question 1

Which of the following is the MOST common ergonomic risk factor contributing to musculoskeletal disorders (MSDs) in construction workers?

Accepted Answer

Repetitive motion, heavy manual lifting, and sustained awkward postures

Answer

Chemical exposure from solvent-based coatings

Answer

Noise levels exceeding 85 decibels

Answer

UV radiation exposure during outdoor work

Question 2

A carpenter reports tingling, numbness, and intermittent whitening of the fingers after months of extended use of vibrating power tools. This is MOST consistent with:

Accepted Answer

Hand-Arm Vibration Syndrome (HAVS)

Answer

Noise-induced hearing loss

Answer

Heat-related illness

Answer

Contact dermatitis

Question 3

Workers are repeatedly lifting 60-pound bags of concrete mix by hand. Which control BEST reduces ergonomic risk, according to the hierarchy of controls?

Accepted Answer

Using a mechanical lift assist, hand truck, or conveyor

Answer

Requiring workers to use proper bending-knee technique

Answer

Issuing back-support lifting belts to all crew members

Answer

Scheduling more frequent rest breaks throughout the shift

Question 4

A supervisor observes drywall finishers consistently holding their arms above shoulder height for extended periods. What is the PRIMARY ergonomic concern?

Accepted Answer

Elevated risk of shoulder impingement and neck musculoskeletal injury

Answer

Increased risk of tripping on overhead equipment

Answer

Reduced situational awareness for slip hazards below

Answer

Decreased grip strength on hand tools

Question 5

Under OSHA's General Duty Clause, what must a construction supervisor do when a recognized ergonomic hazard exists on site, even though no specific OSHA ergonomics standard for construction has been issued?

Accepted Answer

Take feasible steps to reduce or eliminate the recognized hazard

Answer

Document the hazard and include it in the next monthly safety report

Answer

Wait for OSHA to promulgate a specific ergonomics standard before acting

Answer

Allow workers to self-select their preferred work methods

Question 6

Which administrative control is MOST effective for managing ergonomic risk during sustained repetitive concrete block laying?

Accepted Answer

Rotating workers between tasks with different physical demands

Answer

Issuing knee pads to all workers on the task

Answer

Posting an ergonomics warning sign at the work area

Answer

Conducting a daily toolbox talk about proper lifting posture