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

Rigid clevis hanger

Answer

Spring hanger (variable spring support)

Answer

Two-bolt pipe clamp

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

Applying a known electrical resistance to the gauge sensor

Answer

Comparing two gauges side-by-side

Answer

Filling the gauge with a standard fluid

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

Increase cutting oil flow and continue

Answer

Reduce die speed and continue

Answer

Apply pipe dope to cover the torn 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

Manometer

Answer

Hydrometer

Answer

Pitot tube

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

It threads the pipe end for a coupling

Answer

It measures the pipe wall thickness

Answer

It deburrs only the inside diameter

Question 6

When using a magnetic drill (mag drill) to drill holes in a steel structural member for pipe support installation, the operator must ensure:

Accepted Answer

The base magnet has full, flat contact with the steel and the interlock light confirms adhesion before drilling

Answer

The magnet is deactivated before starting the drill motor

Answer

The drill bit is running in reverse

Answer

The workpiece is made of stainless steel only

Question 7

A pneumatic impact wrench is preferred over a manual torque wrench for initial flange bolt run-down because:

Accepted Answer

It speeds up bringing all bolts to snug-tight before sequential torquing begins

Answer

It provides precisely calibrated final torque values

Answer

It eliminates the need for final torque verification

Answer

It can only be used on stainless steel bolts