API BFJI Bolted Flange Joint Inspector Practice Questions — 10 Free (2026)

Per ASME PCC-1, why is the gap alignment tolerance expressed relative to gasket thickness?

• A. Because gaskets vary in thickness
• B. Because the gap closes as the gasket is compressed during the tightening of the joint
• C. Because a fixed value would be too tight on large flanges and too loose on small ones
• D. Because what matters is whether the gasket can span the space ✓
• E. Because the gasket thickness determines the flange separation once the joint is assembled

The other three tolerances are fixed dimensions because they describe geometry. This one describes whether a component will reach, so it scales with that component. ASME PCC-1, Nonmandatory Appendix E, E-2

Per SA-193, which equipment types does the bolting covered by the specification serve?

• A. Structural steelwork only
• B. Rotating equipment casings and their associated baseplates and holding down arrangements
• C. Pipelines and their associated buried fittings, together with above ground station pipework
• D. Valves, flanges, fittings and pressure vessels ✓
• E. Storage tanks, together with the nozzle and manway connections attached to their shell plates

All four hold pressure, which fits a specification written for bolting in high temperature and high pressure duty. ASME BPVC Section II.A, SA-193, Scope

Per ASME PCC-2, how is a spiral wound gasket fitted with a centering ring classified for hot and half bolting purposes?

• A. As unconfined
• B. As a soft gasket, because the windings compress more than one millimetre during assembly
• C. As a hard faced gasket, because the winding metal contacts the flange seating surface directly
• D. As a special gasket, requiring separate consideration in the job specific procedure prepared
• E. As a confined gasket ✓

Confinement matters because it governs blowout potential when the joint is partly unloaded. The centering ring physically restrains the sealing element from being expelled. ASME PCC-2, Article 311, 311-3.1

Per ASME B16.5, how shall flanges and flanged fittings be manufactured?

• A. By welding two halves together
• B. As one piece, except that a hub may be welded to a plate flange where agreed with the purchaser
• C. In one piece, with no building up of the finished flange from several parts ✓
• D. As one piece for Class 600 and above, with fabricated construction permitted at lower classes
• E. By any method, provided the finished component satisfies the mechanical property requirements

This closes off fabricated flanges entirely. A flange assembled from pieces would have weld joints in the pressure boundary that the Standard's ratings never contemplated. ASME B16.5, 5.1

Per ASME B16.20, what does the spiral construction achieve that a solid gasket could not?

• A. It reduces the gasket cost
• B. It allows the gasket to be manufactured in any diameter without dedicated tooling
• C. It combines the load capacity of metal with the conformability of a soft filler ✓
• D. It permits the gasket to be compressed to a controlled thickness at a stated stress
• E. It provides a path for the filler to be replaced when the gasket is reconditioned

Neither material alone would serve. The alternating construction lets each do the part of the job it is suited to. ASME B16.20, SW-2.2

Per ASTM A193, why may a stud and a bolt of the same alloy and size have different properties when strain hardened?

• A. Because a stud has no head to form
• B. The stud may come out of a bar narrower than the bolt would need ✓
• C. Because a bolt is hot forged while a stud is machined from bar in the cold worked condition
• D. Because the thread on a stud is rolled while the thread on a bolt of the same size is cut
• E. Because a stud is supplied in a different class from a bolt of the same nominal diameter

The bolt needs a larger bar to allow its head to be formed, so it starts from stock that received a different amount of reduction. The finished dimensions are the same but the material history is not. ASTM A193/A193M, X1

Per ASME B16.48, on what basis are line blank dimensions established with respect to gaskets?

• A. On a spiral wound gasket seated concentrically with an inner ring, per ASME B16.20 ✓
• B. On flat sheet gaskets
• C. On ring joint gaskets, since these represent the most demanding sealing arrangement in use
• D. On the largest gasket that could be fitted within the raised face of the mating flange used
• E. On grooved metal gaskets with covering layers, being the construction with the least compression

Design around the gasket carrying an inner ring and the blank bore cannot foul it. Dimensions also stay inside the flange standard's largest permitted bore. ASME B16.48, B16.48, 5.1

Per ASME B16.47, what is the status of the bolting materials listed in the Standard?

• A. They are recommended, and other materials may be used if the applicable code permits ✓
• B. They are mandatory
• C. They are minimum requirements which the user may make more onerous but may not relax
• D. They are examples only
• E. They are required for Class 900 and above and recommended for the lower pressure classes

The list is a recommendation rather than a closed set. That leaves the construction code as the governing authority on whether an alternative material is acceptable. ASME B16.47, Bolting

Per ASME PCC-1, what additional monitoring may be necessary for critical or problematic joints using highly compressible gaskets?

• A. Monitoring the amount and uniformity of the flange gaps ✓
• B. Continuous torque logging
• C. Ultrasonic elongation measurement taken on every bolt at the end of each tightening pass
• D. Recording the compressed thickness of the gasket at four positions around the joint face
• E. Measuring the temperature of the gasket during assembly to confirm it remains within limits

Gap measurement reveals both how far the joint has closed and whether it has closed evenly, which is exactly the failure mode that highly compressible gaskets are prone to. ASME PCC-1, Nonmandatory Appendix F, F-9

Per ASME B16.20, from where shall spiral metallic winding materials be selected?

• A. From the ring gasket hardness table
• B. From the grooved metal gasket material table, which lists the same alloys and colour codes
• C. From the winding material table, or as agreed between purchaser and manufacturer ✓
• D. From the material table only, since agreement between the parties cannot override the Standard
• E. From ASME B16.5, which lists the materials permitted for the flanges the gasket is fitted to

The agreement route allows materials outside the table where a service demands it. Nonmetallic filler materials are handled by a separate provision rather than by the same table. ASME B16.20, SW-3