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API API-577 - Welding Inspection and Metallurgy Exam

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Total 110 questions

Hardenability of a steel can be an indirect indicator of:

A.

Weldability

B.

Toughness

C.

Strength

D.

Cooling rate

When verifying that the filler metal selection is appropriate for the base metal being welded, an inspector should consider:

A.

Chemical composition.

B.

Tensile strength to be higher than the base metal.

C.

Acceptability of physical properties.

D.

Need for postweld heat treatment (PWHT).

If an individual changes an essential variable in the WPS, the individual must:

A.

Re-qualify the PQR.

B.

Re-qualify the WPS.

C.

Record the change on the existing WPS.

D.

List the change as a supplement to the WPS.

The most common measure of weldability and susceptibility to hot cracking of austenitic stainless steels is the ferrite content of the weld metal. Which of the following ranges is the recommended minimum ferrite content of the weld metal needed to prevent cracking?

A.

1%-10%

B.

5%-20%

C.

8%-18%

D.

15%-20%

Hardness testing of production welds and the HAZ requires test areas to be:

A.

Ground to a smooth contour.

B.

Cleaned down to the bare metal.

C.

Cleaned to remove surface scale and flux.

D.

Clean, flat area or even flush with the base metal.

General awareness of metallurgy is important to the welding inspector because:

A.

Welding processes can affect both mechanical and corrosion properties of a weldment.

B.

The crystalline structure of base metals affects the resulting structure of the weld.

C.

Physical properties of the final weldment can be significantly affected by preheat and postweld heat treatment (PWHT).

D.

A thorough knowledge of weld metal structures is necessary to understand weldability.

If a test specimen from a welded coupon should fail during PQR mechanical tests:

A.

Three out of four of the required test specimens must pass.

B.

The test coupon fails and a new coupon is required.

C.

Two additional test specimens from the coupon must be tested and pass.

D.

The WPS fails.

Heating a round bar to an elevated temperature and then quenching one end is a test method to determine:

A.

Hardenability.

B.

Temper embrittlement.

C.

Heat treatability.

D.

Thermal conductivity.

For design purposes, the maximum usefulness of a weldment under test is based upon the:

A.

Yield strength.

B.

Hardness.

C.

Ultimate tensile strength.

D.

Toughness.

Which of the following determines the necessity for preheat and postweld heat treatment?

A.

The percentage of carbon that will be in the completed weld

B.

The as-rolled hardness of the welding components

C.

The carbon equivalent of the steel

D.

The rate of cooling after the welding is completed