Master Plumber Exam Jobsite Safety and Regulations 5 — Questions and Answers
Question 1: Under the Clean Water Act, a plumber who accidentally discharges untreated sewage into a storm drain during a repair must first notify which authority?
- The local fire department
- The EPA regional office or local environmental agency (Correct answer)
- The building owner only
- OSHA within 8 hours
Correct answer: The EPA regional office or local environmental agency
Discharges of pollutants including sewage into storm drains or waterways must be reported to the EPA or the relevant state/local environmental agency under the Clean Water Act.
Question 2: What is the purpose of the 'Hot Work Permit' system on a jobsite where a plumber is soldering near flammable insulation?
- To document the plumber's license and insurance
- To authorize and control fire-producing activities and establish safeguards (Correct answer)
- To obtain approval from the local fire marshal before any soldering
- To record the type of solder alloy being used
Correct answer: To authorize and control fire-producing activities and establish safeguards
A Hot Work Permit system is designed to authorize fire-producing work such as soldering or welding and to ensure fire watches, extinguishers, and area clearances are in place.
Question 3: Which federal regulation requires plumbers who disturb lead-based paint in pre-1978 buildings to follow specific work practice standards?
- OSHA 29 CFR 1926.62
- EPA RRP Rule (40 CFR Part 745) (Correct answer)
- OSHA 29 CFR 1910.1025
- NFPA 99
Correct answer: EPA RRP Rule (40 CFR Part 745)
The EPA's Renovation, Repair and Painting (RRP) Rule under 40 CFR Part 745 requires certified firms and trained workers when disturbing lead paint in pre-1978 residential and child-occupied facilities.
Question 4: A plumber finds asbestos-containing pipe insulation in a commercial building. What is the CORRECT immediate action?
- Remove it carefully using a wet method and dispose of it
- Stop work, secure the area, and notify a licensed asbestos abatement contractor (Correct answer)
- Cover it with new insulation and continue the job
- Report it to OSHA only if it is friable
Correct answer: Stop work, secure the area, and notify a licensed asbestos abatement contractor
Disturbing asbestos-containing materials requires licensed abatement professionals; the plumber must stop work, isolate the area, and coordinate with a certified asbestos contractor.
Question 5: Under OSHA standards, a ladder used on a construction site must be capable of supporting what multiple of the maximum intended load?
- Two times
- Three times
- Four times (Correct answer)
- Five times
Correct answer: Four times
OSHA 1926.1053 requires that portable ladders be capable of supporting without failure at least four times the maximum intended load.
Question 6: A master plumber is required to maintain OSHA 300 logs. After how many on-site employees triggers this recordkeeping requirement?
- 1 or more
- 5 or more
- 11 or more (Correct answer)
- 26 or more
Correct answer: 11 or more
Employers with 10 or fewer employees are generally exempt from OSHA 300 log recordkeeping; the requirement applies to establishments with 11 or more employees.
Question 7: When a plumber is required to wear a hard hat on a jobsite, which ANSI class provides protection against lateral impacts as well as top impacts?
- Type I, Class E
- Type II, Class G
- Type I, Class G
- Type II, Class E (Correct answer)
Correct answer: Type II, Class E
ANSI Type II hard hats provide protection from both top and lateral impacts, and Class E (Electrical) provides dielectric protection up to 20,000 volts — Type II, Class E offers both protections.
Master Plumber Exam Jobsite Safety and Regulations 5
Under the Clean Water Act, a plumber who accidentally discharges untreated sewage into a storm drain during a repair must first notify which authority?