Bend Testing: Types, Parameters, and Evaluation for Weld Inspection

Question 1

Which of the following is NOT a type of bend test commonly used in welding inspection?

Accepted Answer

Tensile bend test

Answer

Free bend test

Answer

Guided bend test

Question 2

What is the primary purpose of conducting a bend test on a welded joint?

Accepted Answer

To determine the ductility of the welded material

Answer

To assess the strength of the weld

Answer

To evaluate the fatigue resistance of the weld

Question 3

Which of the following tools is used to measure the angle of a bend during a bend test?

Accepted Answer

Protractor

Answer

Calipers

Answer

Micrometer

Question 4

What is the significance of a crack on the outside surface of a bend test specimen?

Accepted Answer

It indicates a lack of ductility in the weld metal

Answer

It indicates poor weld penetration

Answer

It indicates excessive weld heat input

Answer

It is not significant because it is on the outside surface

Question 5

How is the root of a weld tested using a guided root bend test?

Accepted Answer

By bending the weld specimen over a mandrel that supports the root

Answer

By applying a tensile load to the weld

Answer

By bending the weld specimen freely

Answer

By applying a compressive load to the weld

Question 6

For a 1/4 inch thick plate, what is the standard bend angle?

Accepted Answer

90 degrees

Answer

180 degrees

Answer

60 degrees

Answer

45 degrees

Question 7

Which bend type is most suitable for assessing weld ductility?

Accepted Answer

Guided-free bend test

Answer

Guided bend test

Answer

Free bend test

Answer

Reverse bend test

Question 8

Which of these is NOT a type of bend test used to evaluate weld quality?

Accepted Answer

Tensile test

Answer

Free bend

Answer

Guided bend

Answer

Reverse bend

Question 9

Which of the following bend test types is NOT commonly used in welding inspection?

Accepted Answer

Tensile bend test

Answer

Side bend test

Answer

Root bend test

Answer

Face bend test

Question 10

What is the primary purpose of conducting a bend test on a welded joint?

Accepted Answer

To assess the ductility and soundness of the weld

Answer

To determine the tensile strength of the weld

Answer

To measure the thickness of the weld

Answer

To calculate the hardness of the weld

Question 11

In a root bend test, what is the desired result?

Accepted Answer

No cracking or breaking

Answer

Partial cracking along the weld root

Answer

Complete cracking through the weld root

Answer

Tearing along the edge of the specimen

Question 12

Which of the following is an example of a non-destructive bend testing method?

Accepted Answer

Visual bend test

Answer

Radiographic bend test

Answer

Ultrasonic bend test

Answer

Fractographic bend test

Question 13

What is the primary role of a bend test template in the evaluation of bend test results?

Accepted Answer

To verify the accuracy of the bend angle

Answer

To measure the width of the crack

Answer

To determine the depth of penetration

Answer

To identify the location of defects

Question 14

How do industry standards and codes ensure the reliability of bend testing practices in weld inspection?

Accepted Answer

By establishing uniform testing procedures, ensuring consistent bend test execution and minimizing variability.

Answer

By providing safety guidelines for bend testing, minimizing the risk of accidents during the testing process.

Answer

By promoting efficiency in bend testing, reducing the time and resources required to conduct the tests.

Question 15

Which of the following is NOT a type of bend test used in welding inspection?

Accepted Answer

Tensile Strength Test

Answer

Guided Bend Test

Answer

Free Bend Test

Answer

Reverse Bend Test

Question 16

What is the primary purpose of a Guided Bend Test?

Accepted Answer

To evaluate the ductility of a weld joint

Answer

To measure the hardness of a weld bead

Answer

To determine the tensile strength of a weld

Answer

To check the alignment of a welded joint

Question 17

Which of the following factors does NOT influence the outcome of a bend test?

Accepted Answer

Ambient temperature

Answer

Weld geometry

Answer

Material thickness

Answer

Welding technique

Question 18

Which bend type is used to assess the ductility of a weld parallel to the weld axis?

Accepted Answer

Side Bend Test

Answer

Face Bend Test

Answer

Root Bend Test

Answer

Fillet Weld Bend Test

Question 19

What is meant by a "specimen" in the context of bend testing?

Accepted Answer

A section of a weld joint prepared for testing

Answer

A welding electrode

Answer

A testing machine

Answer

A calibration device

Question 20

Which of the following is a destructive testing method used in weld inspection?

Accepted Answer

Bend Test

Answer

Ultrasonic Testing (UT)

Answer

Visual Testing (VT)

Answer

Magnetic Particle Testing (MT)

Question 21

What is the primary purpose of evaluating bend test results?

Accepted Answer

To ensure weld quality

Answer

To determine the welding procedure

Answer

To select the appropriate welding equipment

Answer

To calculate the weld strength

Question 22

What is the primary goal of bend testing in welding inspection?

Accepted Answer

To evaluate weld ductility and fracture toughness

Answer

To measure the tensile strength of the weld

Answer

To determine the hardness of the weld metal

Answer

To inspect welds for porosity and inclusions

Question 23

What is the importance of the "free bend" portion in a bend test specimen?

Accepted Answer

It represents the unconstrained portion of the weld that undergoes evaluation for cracking.

Answer

It provides a buffer zone to minimize edge effects.

Answer

It allows the specimen to bend without excessive restraint.

Answer

It ensures uniform bending across the specimen.

Question 24

Distinguish between a guided bend test and a free bend test.

Accepted Answer

Guided bend tests are performed with a supporting fixture, unlike free bend tests.

Answer

Free bend tests are performed with a supporting fixture, unlike guided bend tests.

Answer

Guided bend tests utilize smaller specimen sizes than free bend tests.

Answer

Free bend tests are more commonly used in production settings than guided bend tests.

Question 25

In bend testing, which result indicates a ductile weld?

Accepted Answer

Absence of cracks or breaks, along with a smooth bend surface

Answer

Presence of cracks or breaks, along with a rough or uneven bend surface

Answer

Significant deformation without cracks or breaks

Answer

Complete fracture of the specimen

Question 26

Is bend testing considered a destructive testing method?

Accepted Answer

Yes

Answer

No

Question 27

Which of the following is NOT a type of bend test commonly used in welding inspection?

Accepted Answer

Tensile test

Answer

Free bend test

Answer

Guided bend test

Answer

Root bend test

Question 28

What is the primary purpose of a guided bend test?

Accepted Answer

To evaluate the ductility of the weld metal

Answer

To assess the strength of the weld joint

Answer

To identify cracks or other defects in the weld

Answer

To measure the yield strength of the base metal

Question 29

Which of the following parameters is NOT typically considered in a bend test?

Accepted Answer

Tensile strength

Answer

Bend angle

Answer

Bend radius

Answer

Weld size

Question 30

What does the presence of a crack on the inside surface of a bend test specimen indicate?

Accepted Answer

Insufficient ductility in the weld metal

Answer

Potential issues with the base metal

Answer

Improper test specimen preparation

Answer

No significant concern

Question 31

Explain the difference between a root bend test and a face bend test.

Accepted Answer

Root bend test is performed on the root of the weld, while face bend test is performed on the face of the weld

Answer

Face bend test is performed on the root of the weld, while root bend test is performed on the face of the weld

Answer

There is no difference between root bend test and face bend test

Answer

Root bend test is only used for fillet welds, while face bend test is used for all types of welds

Question 32

In which bend test type is the specimen bent around a specific radius with support?

Accepted Answer

Guided bend test

Answer

Fillet weld bend test

Answer

Free bend test

Answer

Side bend test

Question 33

Which of these indicates a failed bend test?

Accepted Answer

Presence of cracks on the outside surface of the bend

Answer

Slight deformation of the weld metal

Answer

Elongation of the weld metal

Answer

Absence of cracks on the inside surface of the bend

Question 34

What is the primary purpose of a root bend test?

Accepted Answer

To assess the weld root's soundness and lack of defects

Answer

To evaluate the strength of the weld throat

Answer

To evaluate the ductility of the weld metal

Question 35

What is the key difference between a free bend test and a guided bend test?

Accepted Answer

A free bend test has no support during bending, while a guided bend test uses a jig to control the bend.

Answer

A free bend test uses a smaller bend radius than a guided bend test.

Question 36

What does the bend angle in a bend test primarily indicate?

Accepted Answer

The ductility of the weld metal

Answer

The hardness of the weld metal

Answer

The strength of the weld metal

Answer

It has no significance

Question 37

What is the primary reason for conducting a bend test on a welded joint?

Accepted Answer

To evaluate the ductility and soundness of the weld and the surrounding material.

Answer

To determine the weld's tensile strength.

Answer

To measure the weld's hardness.

Question 38

Which of the following is NOT a standard bend test type?

Accepted Answer

Spiral bend test

Answer

Guided bend test

Answer

Side bend test

Answer

Free bend test

Question 39

In a guided bend test, what is the primary function of the die?

Accepted Answer

To control the radius of curvature during bending.

Answer

To apply tensile force to the specimen.

Answer

To prevent the specimen from twisting.

Answer

To measure the elongation of the weld.

Question 40

What is the primary purpose of conducting a bend test in welding inspection?

Accepted Answer

To assess the ductility and resistance to cracking of a weld or heat-affected zone.

Answer

To determine the hardness of the weld metal.

Answer

To measure the tensile strength of the weld.

Question 41

The acceptance criteria for a bend test are primarily determined by:

Accepted Answer

The applicable welding code or standard.

Answer

The thickness of the base metal.

Answer

The welder's personal preference.

Question 42

What is the significance of the bend angle in a bend test?

Accepted Answer

It indicates the maximum angle to which the specimen can be bent without failure.

Answer

It measures the impact toughness of the weld metal.

Answer

It determines the yield strength of the weld.

Question 43

During the preparation of a bend test specimen, it is important to:

Accepted Answer

Round the edges to prevent stress concentrations.

Answer

Coat the specimen with oil to reduce friction.

Answer

Apply heat to increase ductility.

Question 44

A bend test specimen fails before reaching the specified bend angle. This indicates that:

Accepted Answer

The weld or heat-affected zone exhibits insufficient ductility.

Answer

The test equipment was malfunctioning.

Answer

The specimen was improperly prepared.

Question 45

Which of the following information is typically included in a bend test report?

Accepted Answer

All of the above

Answer

Observation of any discontinuities

Answer

Dimensions of the test specimen

Answer

Type of bend test performed