South Carolina Pipefitter License Exam
Practice Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. In pipefitting, what is the primary purpose of a pipe support?
A. To increase fluid velocity
B. To prevent stress and sagging in piping systems
C. To change pipe diameter
D. To filter out debris
Bold-italic rationale: Pipe supports are used to hold pipes in place,
prevent excessive stress, and maintain alignment, ensuring system
integrity and safety.
2. Which code book is most commonly referenced for piping systems in
South Carolina licensing exams?
A. NFPA 70
B. International Plumbing Code (IPC)
C. National Fuel Gas Code
D. Uniform Building Code
Bold-italic rationale: The International Plumbing Code is frequently
cited in state exams and referenced material for plumbing and piping
systems in South Carolina.
3. What is the minimum PPE required when threading steel pipe?
A. Earplugs only
B. Steel-toed boots only
C. Safety goggles and gloves
D. Respirator only
, Bold-italic rationale: Threading pipe generates chips and sharp
debris, making eye and hand protection essential for safety.
4. A 4-inch horizontal drain line must be sloped at least:
A. 1/16 inch per foot
B. 1/8 inch per foot
C. 1/4 inch per foot
D. 1/2 inch per foot
Bold-italic rationale: Proper slope ensures gravity flow and prevents
standing water in drain systems.
5. Which fitting is typically used to connect pipes of different diameters?
A. Elbow
B. Cross
C. Reducer
D. Cap
Bold-italic rationale: A reducer fitting allows connection between
larger and smaller pipe sizes.
6. OSHA standards for construction safety fall under which CFR title?
A. CFR Title 42
B. CFR Title 14
C. CFR Title 29 Part 1926
D. CFR Title 49
Bold-italic rationale: OSHA construction safety standards relevant to
pipefitting and excavation are contained in Title 29 Part 1926.
7. The primary hazard when soldering copper pipe is:
A. Electric shock
B. Burns from heat and molten solder
C. Radiation
D. Silica dust
Bold-italic rationale: Soldering involves high heat, posing a burn risk
without proper protective equipment.
8. Which valve type allows flow in only one direction?
A. Gate valve
B. Globe valve
C. Ball valve
D. Check valve
, Bold-italic rationale: Check valves prevent backflow by allowing fluid
to flow in only one direction.
9. A P-trap is installed in drain systems primarily to prevent:
A. High velocity flow
B. Sewer gases from entering the building
C. Water hammer
D. Heat loss
Bold-italic rationale: P-traps hold water that blocks sewer gas from
rising into occupied spaces.
10. What is the purpose of insulation on piping?
A. Increase noise
B. Reduce heat loss or gain in the piping system
C. Add weight
D. Improve aesthetics
Bold-italic rationale: Insulation helps maintain temperature control
and energy efficiency in piping.
11. When installing threaded pipe, the preferred sealant is:
A. Epoxy
B. Concrete
C. Thread sealing compound or Teflon tape
D. Silicone caulk
Bold-italic rationale: Thread sealants prevent leaks in threaded pipe
connections.
12. Which tool is most appropriate for tightening large nuts on pipe
fittings?
A. Screwdriver
B. Pliers
C. Pipe wrench
D. Allen wrench
Bold-italic rationale: Pipe wrenches are designed for gripping and
turning pipes and fittings securely.
13. A backflow prevention device is used to:
A. Increase pressure
B. Cool fluids
C. Protect potable water from contamination
Practice Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. In pipefitting, what is the primary purpose of a pipe support?
A. To increase fluid velocity
B. To prevent stress and sagging in piping systems
C. To change pipe diameter
D. To filter out debris
Bold-italic rationale: Pipe supports are used to hold pipes in place,
prevent excessive stress, and maintain alignment, ensuring system
integrity and safety.
2. Which code book is most commonly referenced for piping systems in
South Carolina licensing exams?
A. NFPA 70
B. International Plumbing Code (IPC)
C. National Fuel Gas Code
D. Uniform Building Code
Bold-italic rationale: The International Plumbing Code is frequently
cited in state exams and referenced material for plumbing and piping
systems in South Carolina.
3. What is the minimum PPE required when threading steel pipe?
A. Earplugs only
B. Steel-toed boots only
C. Safety goggles and gloves
D. Respirator only
, Bold-italic rationale: Threading pipe generates chips and sharp
debris, making eye and hand protection essential for safety.
4. A 4-inch horizontal drain line must be sloped at least:
A. 1/16 inch per foot
B. 1/8 inch per foot
C. 1/4 inch per foot
D. 1/2 inch per foot
Bold-italic rationale: Proper slope ensures gravity flow and prevents
standing water in drain systems.
5. Which fitting is typically used to connect pipes of different diameters?
A. Elbow
B. Cross
C. Reducer
D. Cap
Bold-italic rationale: A reducer fitting allows connection between
larger and smaller pipe sizes.
6. OSHA standards for construction safety fall under which CFR title?
A. CFR Title 42
B. CFR Title 14
C. CFR Title 29 Part 1926
D. CFR Title 49
Bold-italic rationale: OSHA construction safety standards relevant to
pipefitting and excavation are contained in Title 29 Part 1926.
7. The primary hazard when soldering copper pipe is:
A. Electric shock
B. Burns from heat and molten solder
C. Radiation
D. Silica dust
Bold-italic rationale: Soldering involves high heat, posing a burn risk
without proper protective equipment.
8. Which valve type allows flow in only one direction?
A. Gate valve
B. Globe valve
C. Ball valve
D. Check valve
, Bold-italic rationale: Check valves prevent backflow by allowing fluid
to flow in only one direction.
9. A P-trap is installed in drain systems primarily to prevent:
A. High velocity flow
B. Sewer gases from entering the building
C. Water hammer
D. Heat loss
Bold-italic rationale: P-traps hold water that blocks sewer gas from
rising into occupied spaces.
10. What is the purpose of insulation on piping?
A. Increase noise
B. Reduce heat loss or gain in the piping system
C. Add weight
D. Improve aesthetics
Bold-italic rationale: Insulation helps maintain temperature control
and energy efficiency in piping.
11. When installing threaded pipe, the preferred sealant is:
A. Epoxy
B. Concrete
C. Thread sealing compound or Teflon tape
D. Silicone caulk
Bold-italic rationale: Thread sealants prevent leaks in threaded pipe
connections.
12. Which tool is most appropriate for tightening large nuts on pipe
fittings?
A. Screwdriver
B. Pliers
C. Pipe wrench
D. Allen wrench
Bold-italic rationale: Pipe wrenches are designed for gripping and
turning pipes and fittings securely.
13. A backflow prevention device is used to:
A. Increase pressure
B. Cool fluids
C. Protect potable water from contamination
