MASTER PIPEFITTER
CERTIFICATION EXAM (2026
UPDATED)|||| questions and answers
with rationales/graded A+/2026
update/100% correct /instant
download
School: Center for Advanced Trade Technology
Exam Code: MP-2026-F
Questions: 80
Time Limit: 180 minutes
Passing Score: 75% (60/80)
Instructions: Select the single best answer for each question. Correct answers
are highlighted in bold with a rationale.
SECTION 1: PIPE & FITTING IDENTIFICATION (Q1-10)
Q1. What color band is required on a 2026 hydrogen gas pipeline per ASME
B31.12?
a) Yellow
b) Brown
c) Green
d) Blue
Rationale: ASME B31.12-2026 mandates green for gaseous hydrogen pipelines;
yellow is for natural gas.
Q2. A fitting marked “STD” on a 6” carbon steel pipe refers to:
a) Standard wall thickness for schedule 10
b) Standard wall thickness for schedule 40
c) Standard taper thread
,d) Stainless steel grade
Rationale: STD = Schedule 40 for NPS ≤ 10”.
Q3. Which fitting allows a 45° change in direction in a steam line?
a) 90° LR elbow
b) 90° SR elbow
c) 45° elbow
d) Lateral
Rationale: 45° elbow = 45° change. Laterals are for branch connections.
Q4. A “Tee” with reduced outlet (e.g., 6x4) is called:
a) Straight tee
b) Reducing tee
c) Cross tee
d) Latrolet
Rationale: Reducing tee has a branch size smaller than the run.
Q5. Identify: Fitting with internal threads, used to join two male threaded pipes.
a) Nipple
b) Coupling
c) Union
d) Bushing
Rationale: Coupling = female threads both ends.
Q6. Sch 80 pipe has a ________ wall thickness than Sch 40 for the same NPS.
a) Thinner
b) Thicker
c) Equal
d) Variable
Rationale: Higher schedule number = thicker wall (up to Sch 160).
Q7. What does “SW” stamped on a flange mean?
a) Slip-on Weld
b) Socket Weld
c) Spiral Wound
d) Stainless Weld
Rationale: SW = Socket Weld flange.
Q8. A fitting that allows pipe expansion/contraction is a:
a) Expansion joint
, b) Elbow
c) Cap
d) Weldolets
Rationale: Expansion joints absorb thermal movement.
Q9. The radius of a 6” long radius (LR) elbow is:
a) 6”
b) 9”
c) 12”
d) 18”
Rationale: LR elbow radius = 1.5 × NPS = 1.5 × 6 = 9”.
Q10. Which fitting is used to dead-end a pipe?
a) Plug
b) Cap
c) Blind flange
d) Both a & c
Rationale: Cap = welded end cap. Blind flange = bolted dead-end.
SECTION 2: BLUEPRINT READING & ISOMETRICS (Q11-18)
Q11. On a piping isometric, dimension “6′-0″” means:
a) 6 inches
b) 6 feet 0 inches
c) 60 mm
d) 6 meters
Rationale: Prime (′) = feet; double prime (″) = inches.
Q12. The symbol “---E---” on a P&ID indicates:
a) Valve
b) Reducer
c) Electric actuator
d) Flow arrow
Rationale: “E” on actuator denotes electric.
Q13. A “Bill of Materials” (BOM) on a drawing lists:
a) Labor cost
b) Pipe, fittings, flanges with quantities
c) Welders’ names
CERTIFICATION EXAM (2026
UPDATED)|||| questions and answers
with rationales/graded A+/2026
update/100% correct /instant
download
School: Center for Advanced Trade Technology
Exam Code: MP-2026-F
Questions: 80
Time Limit: 180 minutes
Passing Score: 75% (60/80)
Instructions: Select the single best answer for each question. Correct answers
are highlighted in bold with a rationale.
SECTION 1: PIPE & FITTING IDENTIFICATION (Q1-10)
Q1. What color band is required on a 2026 hydrogen gas pipeline per ASME
B31.12?
a) Yellow
b) Brown
c) Green
d) Blue
Rationale: ASME B31.12-2026 mandates green for gaseous hydrogen pipelines;
yellow is for natural gas.
Q2. A fitting marked “STD” on a 6” carbon steel pipe refers to:
a) Standard wall thickness for schedule 10
b) Standard wall thickness for schedule 40
c) Standard taper thread
,d) Stainless steel grade
Rationale: STD = Schedule 40 for NPS ≤ 10”.
Q3. Which fitting allows a 45° change in direction in a steam line?
a) 90° LR elbow
b) 90° SR elbow
c) 45° elbow
d) Lateral
Rationale: 45° elbow = 45° change. Laterals are for branch connections.
Q4. A “Tee” with reduced outlet (e.g., 6x4) is called:
a) Straight tee
b) Reducing tee
c) Cross tee
d) Latrolet
Rationale: Reducing tee has a branch size smaller than the run.
Q5. Identify: Fitting with internal threads, used to join two male threaded pipes.
a) Nipple
b) Coupling
c) Union
d) Bushing
Rationale: Coupling = female threads both ends.
Q6. Sch 80 pipe has a ________ wall thickness than Sch 40 for the same NPS.
a) Thinner
b) Thicker
c) Equal
d) Variable
Rationale: Higher schedule number = thicker wall (up to Sch 160).
Q7. What does “SW” stamped on a flange mean?
a) Slip-on Weld
b) Socket Weld
c) Spiral Wound
d) Stainless Weld
Rationale: SW = Socket Weld flange.
Q8. A fitting that allows pipe expansion/contraction is a:
a) Expansion joint
, b) Elbow
c) Cap
d) Weldolets
Rationale: Expansion joints absorb thermal movement.
Q9. The radius of a 6” long radius (LR) elbow is:
a) 6”
b) 9”
c) 12”
d) 18”
Rationale: LR elbow radius = 1.5 × NPS = 1.5 × 6 = 9”.
Q10. Which fitting is used to dead-end a pipe?
a) Plug
b) Cap
c) Blind flange
d) Both a & c
Rationale: Cap = welded end cap. Blind flange = bolted dead-end.
SECTION 2: BLUEPRINT READING & ISOMETRICS (Q11-18)
Q11. On a piping isometric, dimension “6′-0″” means:
a) 6 inches
b) 6 feet 0 inches
c) 60 mm
d) 6 meters
Rationale: Prime (′) = feet; double prime (″) = inches.
Q12. The symbol “---E---” on a P&ID indicates:
a) Valve
b) Reducer
c) Electric actuator
d) Flow arrow
Rationale: “E” on actuator denotes electric.
Q13. A “Bill of Materials” (BOM) on a drawing lists:
a) Labor cost
b) Pipe, fittings, flanges with quantities
c) Welders’ names
