Before performing maintenance on a 15 HP motor, the lockout/tagout procedure requires how many locks if three electricians will be working on the equipment?
Correct Answer
B) 3 locks, one for each worker
OSHA's lockout/tagout standard requires each worker to apply their own personal lock and tag. Each of the three electricians must place their individual lock on the energy isolation device.
Why This Is the Correct Answer
OSHA's lockout/tagout (LOTO) standard 29 CFR 1910.147 requires that each authorized employee working on equipment must apply their own personal protective lock and tag to the energy isolation device. This ensures that no worker can accidentally energize the equipment while another worker is still performing maintenance. Since three electricians will be working on the 15 HP motor, each must place their individual lock, totaling three locks. The equipment cannot be re-energized until all three workers have completed their work and removed their personal locks.
Why the Other Options Are Wrong
Option A: 1 lock with a group tag
Two locks for redundancy doesn't account for all three workers. OSHA requires each individual worker to have their own lock, not just redundant locks for the equipment.
Option C: 2 locks for redundancy
Supervisors do not require locks unless they are personally performing maintenance work on the equipment. OSHA's standard is based on workers actually exposed to hazardous energy, not supervisory roles.
Memory Technique
Use the acronym 'OWOL' - One Worker, One Lock. Each person working gets their own personal lock, no exceptions.
Reference Hint
OSHA 29 CFR 1910.147 - The Control of Hazardous Energy (Lockout/Tagout), or Florida Building Code Chapter 27 - Electrical Safety
More Project Mgmt Questions
What is the minimum R-value required for wall insulation in Florida Climate Zone 2?
A subcontractor brings a new chemical product to your jobsite. Under the Globally Harmonized System (GHS), what information must be immediately available to workers?
A construction site has a trench that is 8 feet deep in Type B soil. What is the maximum allowable slope ratio for the trench walls without protective systems?
What is the maximum recommended spacing between drywall screws when attaching to wood studs?
Your crew discovers suspected asbestos-containing materials during a renovation project. What is the first action you should take?
A scaffold platform is 12 feet long and 5 feet wide. If the maximum load capacity is 25 pounds per square foot, what is the total weight capacity of this platform?
Which CSI MasterFormat Division would contain specifications for fire-stopping and firesafing materials?
In tilt-up concrete construction, what is the primary advantage of this method over conventional cast-in-place construction?
Which OSHA standard specifically addresses construction industry safety and health regulations?
A structural drawing shows a beam labeled 'W12x26'. What does the '26' represent?
People Also Study
Business & Financial Management
120 questions · 70% to pass
Contract Administration
60 questions · 70% to pass