Certificate of Qualification Steamfitter (307A)
Questions And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
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1. What is the primary responsibility of a steamfitter?
A. Installing electrical distribution systems
B. Installing and maintaining piping systems for steam, gas, and
process fluids
C. Designing architectural layouts
D. Servicing household appliances
Answer: B
Steamfitters work with high-pressure piping systems that carry steam,
gases, and industrial fluids.
2. Which document provides detailed instructions for installing
piping systems?
A. Safety data sheet
B. Job hazard analysis
C. Blueprint or drawing
D. Work permit
Answer: C
Blueprints and drawings show dimensions, materials, and layout of
piping systems.
, 3. What tool is commonly used to cut steel pipe?
A. Pipe wrench
B. Hacksaw or pipe cutter
C. Level
D. Reamer only
Answer: B
Steel pipe is typically cut using a pipe cutter or hacksaw depending on
size.
4. Why is pipe reaming required after cutting?
A. To increase wall thickness
B. To remove internal burrs
C. To change pipe diameter
D. To polish the exterior
Answer: B
Reaming removes burrs that could restrict flow or damage equipment.
5. Which fitting is used to change the direction of a pipe run?
A. Coupling
B. Union
C. Elbow
D. Nipple
Answer: C
Elbows allow piping to change direction, commonly 45° or 90°.
, 6. What is the purpose of a union fitting?
A. To reduce pipe size
B. To permanently join pipe
C. To allow easy disassembly
D. To change material type
Answer: C
Unions allow sections of pipe to be disconnected without cutting.
7. Which type of valve is best suited for throttling flow?
A. Gate valve
B. Globe valve
C. Check valve
D. Relief valve
Answer: B
Globe valves provide good flow control and throttling capability.
8. A gate valve is primarily used for:
A. Flow regulation
B. Pressure relief
C. On/off isolation
D. Preventing backflow
Answer: C
Gate valves are designed to be fully open or fully closed.
, 9. What does a check valve prevent?
A. Overpressure
B. Leakage
C. Backflow
D. Corrosion
Answer: C
Check valves allow flow in only one direction.
10. Which material is commonly used for high-pressure steam
piping?
A. PVC
B. Copper Type M
C. Carbon steel
D. ABS
Answer: C
Carbon steel withstands high temperature and pressure.
11. What is the purpose of pipe supports?
A. Improve appearance
B. Prevent vibration and sagging
C. Increase flow rate
D. Reduce pipe diameter
Answer: B
Supports maintain alignment and protect piping from stress.
Questions And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
Download Pdf
1. What is the primary responsibility of a steamfitter?
A. Installing electrical distribution systems
B. Installing and maintaining piping systems for steam, gas, and
process fluids
C. Designing architectural layouts
D. Servicing household appliances
Answer: B
Steamfitters work with high-pressure piping systems that carry steam,
gases, and industrial fluids.
2. Which document provides detailed instructions for installing
piping systems?
A. Safety data sheet
B. Job hazard analysis
C. Blueprint or drawing
D. Work permit
Answer: C
Blueprints and drawings show dimensions, materials, and layout of
piping systems.
, 3. What tool is commonly used to cut steel pipe?
A. Pipe wrench
B. Hacksaw or pipe cutter
C. Level
D. Reamer only
Answer: B
Steel pipe is typically cut using a pipe cutter or hacksaw depending on
size.
4. Why is pipe reaming required after cutting?
A. To increase wall thickness
B. To remove internal burrs
C. To change pipe diameter
D. To polish the exterior
Answer: B
Reaming removes burrs that could restrict flow or damage equipment.
5. Which fitting is used to change the direction of a pipe run?
A. Coupling
B. Union
C. Elbow
D. Nipple
Answer: C
Elbows allow piping to change direction, commonly 45° or 90°.
, 6. What is the purpose of a union fitting?
A. To reduce pipe size
B. To permanently join pipe
C. To allow easy disassembly
D. To change material type
Answer: C
Unions allow sections of pipe to be disconnected without cutting.
7. Which type of valve is best suited for throttling flow?
A. Gate valve
B. Globe valve
C. Check valve
D. Relief valve
Answer: B
Globe valves provide good flow control and throttling capability.
8. A gate valve is primarily used for:
A. Flow regulation
B. Pressure relief
C. On/off isolation
D. Preventing backflow
Answer: C
Gate valves are designed to be fully open or fully closed.
, 9. What does a check valve prevent?
A. Overpressure
B. Leakage
C. Backflow
D. Corrosion
Answer: C
Check valves allow flow in only one direction.
10. Which material is commonly used for high-pressure steam
piping?
A. PVC
B. Copper Type M
C. Carbon steel
D. ABS
Answer: C
Carbon steel withstands high temperature and pressure.
11. What is the purpose of pipe supports?
A. Improve appearance
B. Prevent vibration and sagging
C. Increase flow rate
D. Reduce pipe diameter
Answer: B
Supports maintain alignment and protect piping from stress.
