Practice Free API-577 Welding Inspection and Metallurgy Exam Exam Questions Answers With Explanation

Parallel

Scarf

Flare

Bevel

Selenium 75

Cobalt 60

Iridium 192

X-ray machine

0.25 inch on either side of the fusion zone

0.25 inch away from the toe of the weld into the base metal

1 inch on either side of the centerline of the weld

Just adjacent to the toe of the weld

A lighter density in the center of the width of the weld image, either extended along the weld or in isolated circular drops.

An irregular darker density near the center of the width of the weld image along the edge of the root pass image.

An abrupt density change across the width of the weld image with a straight longitudinal darker density line at the center of the width of the weld image along the edge of the density change.

A localized darker density with fuzzy edges in the center of the width of the weld image.

The expected load for which the weld will be subject.

The minimum established acceptance criteria.

The requirements as established in ASME Section XI.

The same criteria required for welder qualification.

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

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

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

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

Arc drift.

Arc strike.

Arc blow.

Arc deflection.

Pulsed droplet transfer

Short circuiting transfer

Globular transfer

Spray transfer

1%-10%

5%-20%

8%-18%

15%-20%

Voltage

Arc length

Heat

Travel speed

Pie gauge.

Magnetic-field-sensitive crayon.

Flux line sensitizer.

Calibration gauge.

1.5 in. (38.0 mm)

2.5 in. (63.5 mm)

3 in.(76.2 mm)

3.5 in. (90.0 mm)

0.35

0.45

0.50

0.55

In the undercutting.

Parallel to the weld.

Transverse to the weld.

In the HAZ.

The surface of a joint member included in the groove.

A separation at the joint root between the work pieces.

The beveled surface of the joint members.

That portion of the groove face adjacent to the joint root.

1050°F (556°C)

1150°F (621°C)

1250°F (677°C)

1350°F (730°C)

Coating characteristics.

Chemical composition.

Strength of the filler metal.

Welding position.

Longitudinal groove

Incomplete fusion

Under fill

Undercut

Excessive distortion

Tendency of weld pool to be sluggish

Deflection of the weld arc

Solidification cracking

Weldability

Toughness

Strength

Cooling rate

Electrodes should never be stored in an oven that is used for food storage.

Low-hydrogen electrodes may be stored in ovens with cellulose-based electrodes, but must be in their original, unopened containers.

Electrode ovens should be heated by any means, but must have automatic heat controls and visible temperature indicators.

Low-hydrogen electrodes should never be stored with stainless-steel electrodes.

E7048-H4

E7048

E7018-A1

E7018

A feathery line of longitudinal orientation located at the center of the weld image.

Elongated lines of darker density, irregular in width, and slightly winding in the lengthwise direction.

A feathery, twisted line of darker density running across the width of the weld.

An irregular darker line near the center of the width of the weld image along the edge of the root pass image.

Hardenability.

Temper embrittlement.

Heat treatability.

Thermal conductivity.

0.30%

0.35%

0.42%

0.48%

0.05 - 2.7 ft./sec (0.015 - 0.82 m/sec)

1.3 - 4.0 ft./sec (0.40 - 1.20 m/sec)

2.3 - 3.3 ft./sec (0.70 - 1.00 m/sec)

4.1 - 5.5 ft./sec (1.25 - 1.68 m/sec)

Neutralize and clean the surface within 6 in. (150 mm) of weld bevels

Steam out the piping system and dry

Verify with pH paper that any surface liquid is “basic"

Grind the surfaces near the bevel to remove contaminants

Equipment is simple, inexpensive, and portable.

The slag supports and shapes the weld bead.

There is a reduced requirement for ventilation.

There is minimal postweld cleanup.