Master Plumber Exam Jobsite Safety and Regulations 3 — Questions and Answers
Question 1: What is the maximum allowable noise exposure for a worker without hearing protection under OSHA standards for an 8-hour workday?
- 85 dBA
- 90 dBA (Correct answer)
- 95 dBA
- 100 dBA
Correct answer: 90 dBA
OSHA's permissible exposure limit (PEL) for noise is 90 dBA as an 8-hour time-weighted average without hearing protection.
Question 2: A plumber discovers that a ladder extends only 1 foot above a roof access point. What is the OSHA violation?
- The ladder must extend at least 2 feet above the landing
- The ladder must extend at least 3 feet above the landing (Correct answer)
- The ladder must extend at least 4 feet above the landing
- There is no violation; 1 foot is acceptable
Correct answer: The ladder must extend at least 3 feet above the landing
OSHA 1926.1053 requires portable ladders used to access an upper landing surface to extend at least 3 feet above the landing.
Question 3: Under the OSHA permit-required confined space standard, who is responsible for authorizing entry into a permit space?
- The entry supervisor (Correct answer)
- The attendant
- The authorized entrant
- Any licensed contractor on site
Correct answer: The entry supervisor
The entry supervisor is responsible for verifying that conditions are acceptable and authorizing entry into a permit-required confined space.
Question 4: Which class of fire extinguisher is appropriate for electrical equipment fires on a plumbing jobsite?
- Class A
- Class B
- Class C (Correct answer)
- Class D
Correct answer: Class C
Class C fire extinguishers are rated for electrical fires because they use non-conductive agents that won't conduct electricity back to the user.
Question 5: When using a powder-actuated tool to fasten pipe supports to concrete, workers within what radius must wear eye and face protection?
- 5 feet
- 10 feet (Correct answer)
- 15 feet
- 25 feet
Correct answer: 10 feet
OSHA requires all workers within 10 feet of powder-actuated tool operations to wear appropriate eye and face protection.
Question 6: A plumber's helper is asked to mix solvent cement in a poorly ventilated space. What is the primary health hazard?
- Dermatitis from skin contact
- Inhalation of toxic vapors causing CNS effects (Correct answer)
- Eye damage from UV exposure
- Burns from exothermic reaction
Correct answer: Inhalation of toxic vapors causing CNS effects
PVC and CPVC solvent cements contain VOCs such as cyclohexanone and THF that are toxic and can cause dizziness, headaches, and central nervous system depression when inhaled.
Question 7: Under federal law, how many days does an employer have to report a work-related hospitalization of an employee to OSHA?
- 8 hours
- 24 hours
- 3 days (Correct answer)
- 5 days
Correct answer: 3 days
OSHA requires employers to report any work-related in-patient hospitalization within 24 hours, but an in-patient hospitalization of one or more workers must be reported within 24 hours; amputation and eye loss within 24 hours; fatalities within 8 hours.
Master Plumber Exam Jobsite Safety and Regulations 3
What is the maximum allowable noise exposure for a worker without hearing protection under OSHA standards for an 8-hour workday?