Master Plumber Exam Business Operations & Law 3 — Questions and Answers
Question 1: Which document establishes the legal scope of work, timeline, and payment terms between a plumbing contractor and a property owner?
- Certificate of insurance
- Written contract or agreement (Correct answer)
- Notice to proceed
- Lien waiver
Correct answer: Written contract or agreement
A written contract defines the mutual obligations of both parties, including scope, price, and schedule, and is the primary legal document governing the project.
Question 2: OSHA's Hazard Communication Standard (29 CFR 1910.1200) requires employers to provide employees with Safety Data Sheets (SDS) for hazardous chemicals. How long must SDS records be retained?
- 5 years
- 10 years
- 30 years (Correct answer)
- The duration of the employee's employment only
Correct answer: 30 years
OSHA requires SDS records to be retained for 30 years to support long-term occupational health monitoring.
Question 3: A plumbing contractor bids on a public works project. Under the Davis-Bacon Act, the contractor must pay workers:
- The federal minimum wage only
- Prevailing wages as determined by the U.S. Department of Labor (Correct answer)
- Wages set by the state licensing board
- Union scale wages regardless of project location
Correct answer: Prevailing wages as determined by the U.S. Department of Labor
The Davis-Bacon Act requires federal contractors to pay locally prevailing wages and fringe benefits as determined by the DOL for each labor classification.
Question 4: A plumbing company wants to protect its customer list and pricing formulas from being disclosed by former employees. The best legal tool is a:
- Non-compete agreement
- Non-disclosure agreement (NDA) (Correct answer)
- Hold-harmless clause
- Indemnification clause
Correct answer: Non-disclosure agreement (NDA)
An NDA (confidentiality agreement) legally prohibits employees from sharing proprietary business information with outside parties.
Question 5: When a plumbing contractor submits a change order for additional work, what must the change order include to be enforceable?
- Only the owner's verbal approval documented by a witness
- Written description of work, revised price, and signatures of both parties (Correct answer)
- Approval from the local building department
- Updated insurance certificate reflecting the new scope
Correct answer: Written description of work, revised price, and signatures of both parties
A valid change order must be in writing, describe the added or changed work, state the adjusted price, and bear signatures from both parties.
Question 6: Which type of business structure provides its owners with limited personal liability while allowing profits and losses to pass through to personal tax returns?
- Sole proprietorship
- General partnership
- Limited Liability Company (LLC) (Correct answer)
- C Corporation
Correct answer: Limited Liability Company (LLC)
An LLC combines the liability protection of a corporation with the pass-through taxation of a partnership or sole proprietorship.
Question 7: A customer refuses to pay the final invoice, claiming the work was defective. The contractor believes the work was code-compliant. The most appropriate first step is to:
- File a mechanics lien immediately
- Send a certified demand letter outlining the dispute and resolution timeline (Correct answer)
- Report the customer to the state licensing board
- Abandon the project and write off the loss
Correct answer: Send a certified demand letter outlining the dispute and resolution timeline
A certified demand letter creates a written record of the dispute and gives the customer formal notice before escalating to legal remedies.
Master Plumber Exam Business Operations & Law 3
Which document establishes the legal scope of work, timeline, and payment terms between a plumbing contractor and a property owner?