Steamfitter Equipment and Tools Knowledge 5

Question 1

When selecting a pipe hanger for a high-temperature steam line, which type compensates for axial thermal expansion?

Accepted Answer

Pipe roller support

Answer

A pipe roller support allows the pipe to move axially as it expands thermally, reducing stress at fixed points and connected equipment nozzles.

Question 2

A pressure gauge calibration tester (dead-weight tester) works by:

Accepted Answer

Balancing known weights on a piston to generate a precise reference pressure

Answer

A dead-weight tester uses calibrated masses on a piston of known area; the resulting pressure (F/A) is traceable and used to verify gauge accuracy.

Question 3

What is the correct procedure when a pipe threading die becomes dull and produces torn rather than clean threads?

Accepted Answer

Replace or resharpen the die before continuing

Answer

A dull die tears metal rather than cutting it, producing threads that will leak or fail; the die must be replaced or resharpened to produce structurally sound threads.

Question 4

Which instrument is used to verify that a steam trap is functioning and not passing live steam (blowing through)?

Accepted Answer

Ultrasonic leak detector or infrared thermometer

Answer

An ultrasonic detector picks up the turbulent noise of live steam passing through a failed-open trap, while an IR thermometer shows abnormal temperature on the condensate side.

Question 5

A pipe beveling tool (end prep machine) is used before butt welding because:

Accepted Answer

It creates a precise bevel angle on the pipe end to ensure full-penetration weld joint geometry

Answer

A consistent bevel angle (typically 37.5°) gives the welder a properly shaped groove for full-penetration fusion, which is required on pressure piping.

(Steamfitter) Steamfitter Pipefitter Exam Practice Test

(Steamfitter) Steamfitter Pipefitter Exam Practice Test

Steamfitter Equipment and Tools Knowledge 5