API 570 Piping Inspector Exam Prep FREE Sample Exam

The elbow below the overhead condenser on the slurry oil line from the catalytic cracking unit measures 0.365 in. today. The minimum required thickness for this location is 0.250 in. What is the remaining corrosion allowance at this location?

0.115 in.

Correct Incorrect Correct answer

0.615 in.

Correct Incorrect Correct answer

0.058 in.

Correct Incorrect Correct answer

0.250 in.

Correct Incorrect Correct answer

A Class 3 piping circuit (natural gas feed line to the reformer) has a calculated remaining life of 21 years. What is the maximum interval for visual external inspection of this circuit?

5 years

Correct Incorrect Correct answer

10 years

Correct Incorrect Correct answer

3 years

Correct Incorrect Correct answer

41 years

Correct Incorrect Correct answer

For an LPG rundown line, the minimum required thickness is tm = 0.4375 in. The pipe specification carries a 12.5% mill (under-tolerance) allowance. What nominal wall thickness must be ordered so the delivered wall still meets tm?

0.492 in.

Correct Incorrect Correct answer

0.438 in.

Correct Incorrect Correct answer

0.5 in.

Correct Incorrect Correct answer

0.583 in.

Correct Incorrect Correct answer

What must a PQR record about the variables used on the qualification coupon?

The widest values the fabricator hopes to use in future production

Correct Incorrect Correct answer

The actual values, or actual ranges where the code permits a range, of the essential variables as they were used on that coupon

Correct Incorrect Correct answer

Only the values that differ from the previous PQR

Correct Incorrect Correct answer

The values printed in the construction code's example forms

Correct Incorrect Correct answer

A PQR coupon was 3/4 in. thick, and the resulting WPS claims a qualified base-metal range beginning at 1/16 in. What is wrong with the lower end of that range?

Nothing, because a thick coupon qualifies all thinner material automatically

Correct Incorrect Correct answer

The lower limit should have been set by the welder's performance test instead

Correct Incorrect Correct answer

For a coupon of that thickness the qualified range begins at 3/16 in., so the 1/16 in. claim is below what the PQR supports

Correct Incorrect Correct answer

The claim fails only if production material is actually 1/16 in. thick

Correct Incorrect Correct answer

A new piping circuit is about to enter service and no baseline data exist. What should the inspection program establish?

Baseline thickness measurements at identified monitoring locations, recorded before or as the circuit enters service

Correct Incorrect Correct answer

No measurements until the first scheduled inspection in ten years

Correct Incorrect Correct answer

A single undated reading kept verbally

Correct Incorrect Correct answer

Baseline data only for the pumps, not the piping

Correct Incorrect Correct answer

A thinned elbow is replaced with a new elbow of the same material, size, and rating, restoring the line to its original design conditions. How is this work classified?

An alteration, because any welding is an alteration

Correct Incorrect Correct answer

A rerating, because the elbow is new

Correct Incorrect Correct answer

A repair, because it restores the piping to its original condition without changing design conditions

Correct Incorrect Correct answer

New construction, because a new component was installed

Correct Incorrect Correct answer

A stagnant dead leg on a corrosive service line shows heavy internal deposits at its low point during inspection. What action best addresses the finding?

Evaluate wall thickness in the dead leg, consider removal or periodic flushing, and monitor it as a susceptible location

Correct Incorrect Correct answer

Leave it because dead legs do not corrode

Correct Incorrect Correct answer

Only check the flange faces on the dead leg

Correct Incorrect Correct answer

Increase insulation thickness without examining the pipe

Correct Incorrect Correct answer

Why should a relief device not be gagged or have its inlet blocked as a method of stopping a leak in service?

Gagging is an approved temporary repair

Correct Incorrect Correct answer

Blocking or gagging removes overpressure protection from the equipment, so a leaking device must be managed by safe isolation and replacement or repair under a controlled procedure

Correct Incorrect Correct answer

A gagged valve still relieves at a higher pressure

Correct Incorrect Correct answer

Leaks should always be stopped by gagging first

Correct Incorrect Correct answer

What is crater cracking and where does it typically occur?

A crack running the full length of the heat-affected zone

Correct Incorrect Correct answer

A crack found only in the base metal before welding begins

Correct Incorrect Correct answer

A surface scratch caused by a wire brush after welding

Correct Incorrect Correct answer

A small crack, often star-shaped, in the depression left when an arc is stopped abruptly without filling the crater

Correct Incorrect Correct answer

Determination: Group 1.1, service 500 psig at 400 degF. Ratings at 400 degF: Class 150 = 200 psi, Class 300 = 600 psi, Class 600 = 1200 psi. Most economical class:

Class 150 with heavier bolts

Correct Incorrect Correct answer

Class 300, because its 600 psi rating is the first to cover 500 psig

Correct Incorrect Correct answer

Class 600, because 500 is half of 1000

Correct Incorrect Correct answer

Class 900

Correct Incorrect Correct answer

A spool is closed up without anyone checking its interior. The risk created is that construction debris left inside can:

Increase the flange pressure rating

Correct Incorrect Correct answer

Improve flow by scouring the pipe wall

Correct Incorrect Correct answer

Eliminate the need for flushing

Correct Incorrect Correct answer

Damage pump internals, plug small connections and contaminate the process when the system is started

Correct Incorrect Correct answer

API 570 Piping Inspector Exam Prep FREE Sample Exam — Fixed Set

Quiz Summary

Information

Results

Results

Categories

1. Question

2. Question

3. Question

4. Question

5. Question

6. Question

7. Question

8. Question

9. Question

10. Question

11. Question

12. Question

Programs

Company

Legal

Account