Deck 25: Testing and Inspection of Welds

Question 1

____ result(s) when gas that was dissolved in the molten weld pool forms bubbles that are trapped as the metal cools to become solid.

A) Porosity
B) Inclusions
C) Incomplete fusion
D) Laminations

Answer 1

A

Question 2

Each code gives the ____ that changes a discontinuity to a defect.

A) procedure
B) correction
C) tolerance
D) flaw

Answer 2

C

Question 3

Shearing strength is measured in ____.

A) foot-pounds per square inch
B) pounds per square inch
C) pounds per linear inch
D) foot-pounds per linear inch

Answer 3

C

Question 4

Longitudinal shearing strength is obtained by ____.

A) dividing the maximum force by the width of the specimen
B) multiplying the maximum force by the sum of the length of welds that ruptured
C) dividing the maximum force by twice the width of the specimen
D) dividing the maximum force by the sum of the length of welds that ruptured

Question 5

____ is a groove melted into the base metal adjacent to the weld toe or weld root and left unfilled by weld metal.

A) Arc strike
B) Crater crack
C) Cold lap
D) Undercut

Question 6

Transverse shearing strength is obtained by ____.

A) dividing the maximum force by the width of the specimen
B) multiplying the maximum force by the length of the ruptured weld
C) dividing the maximum force by twice the width of the specimen
D) dividing the maximum force by the length of the ruptured weld

Question 7

A ____ is an interruption in the typical structure of the weld, whereas a ____ is a flaw which renders the part unable to meet minimum acceptance standards.

A) tolerance, flaw
B) tolerance, discontinuity
C) failure, discontinuity
D) discontinuity, defect

Question 8

____ appear(s) in either spherical or cylindrical form.

A) Porosity
B) Inclusions
C) Incomplete fusion
D) Laminations

Question 9

Critical parts or welds are usually ____ percent tested.

A) 50
B) 75
C) 95
D) 100

Question 10

In a fatigue test, the results are reported as ____.

A) pounds per square inch
B) number of stress cycles resisted without failure and total stress used
C) number of stress cycles per square inch
D) foot-pounds per square inch

Question 11

The E7018 electrode should not be weaved wider than ____ times the electrode diameter because very little shielding gas is produced.

A) one and a half
B) two
C) two and a half
D) three

Question 12

____ is/are the lack of coalescence between the molten filler metal and previously deposited filler metal and/or the base metal.

A) Porosity
B) Inclusions
C) Incomplete fusion
D) Laminations

Question 13

Elongation is found by fitting the fractured ends of the specimen together, ____.

A) measuring the distance from the gauge mark to the end of the fracture
B) measuring the distance between gauge marks, and subtracting the gauge length
C) subtracting the gauge length from the distance to the end of the fracture
D) subtracting the gauge length from the original cross-sectional area

Question 14

The two methods used in product quality control are ____ testing.

A) mechanical and nondestructive
B) destructive and visual inspection
C) mechanized and destructive
D) mechanical and destructive

Question 15

____ is/are nonmetallic materials trapped in the weld metal, between weld beads, or between the weld and the base metal.

A) Porosity
B) Inclusions
C) Incomplete fusion
D) Laminations

Question 16

The formula for the cross-sectional area of a specimen at the middle is ____.

A) pi times the diameter
B) pi times the radius
C) pi times the diameter squared
D) pi times the radius squared

Question 17

In a free-bend test, each corner lengthwise should be rounded in a radius not exceeding ____ the thickness of the specimen.

A) 1/2
B) 1/4
C) 1/8
D) 1/10

Question 18

The percent of elongation is found by ____.

A) dividing the elongation by 100
B) dividing the elongation by the gauge length and multiplying by 100
C) dividing the gauge length by 100
D) dividing the gauge length by the elongation and multiplying by 100

Question 19

Tensile strength is determined by ____.

A) dividing the maximum load by the original cross-sectional area of the specimen at the middle
B) multiplying the maximum load by the original cross-sectional area of the specimen at the middle
C) dividing the original cross-sectional area by the maximum load
D) the diameter squared times 0.785

Question 20

In a free-bend test, the width of the specimen is ____ multiplied by the thickness of the specimen.

A) 0.5
B) 1.5
C) 2.5
D) 3.5

Question 21

​The lack of fusion between the filler metal and previously deposited weld metal is called_______.

A) ​interpass cold lap
B) ​inclusions
C) ​lack of sidewall fusion
D) ​None of the above

Question 22

​When evaluating a weld, it is important to note _____________________.

A) ​the size of the discontinuity
B) ​the type of discontinuity
C) ​the location of the discontinuity
D) All of the above

Question 23

​What is the most frequently used nondestructive test?

A) ​visual inspection
B) ​penetrant inspection
C) ​magnetic particle inspection
D) ​radiographic inspection

Question 24

​What term is used to describe a crack that is caused by slag trapped in the metal during manufacturing?

A) ​delamination
B) ​lamination
C) ​lamellar tear
D) ​linear slag inclusions

Question 25

​Which test is done on specimens that are at a specific temperature?

A) ​Izod
B) ​Charpy
C) ​acid
D) ​Nick-break

Question 26

​What units are used to record the energy required to break the specimen in an Izod test?

A) ​pounds per square inch
B) ​pounds per square inch gauge pressure
C) ​inches of water pressure
D) ​foot-pounds

Question 27

____________________ or destructive testing may be used in a random sample testing procedure in mass production.

Question 28

​When using hydrochloric acid in an etch test, the welds are immersed in the reagent ____.

A) ​at room temperature
B) ​at or near freezing
C) ​at or near boiling temperature
D) ​at 100 degrees Fahrenheit

Question 29

In an alternate bend test, the specimen is bent ____ from the gauge lines through an angle of ____.

A) away, 15° to 30°
B) away, 30° to 45°
C) toward, 15° to 30°
D) toward, 30° to 45°

Question 30

With ____________________ testing all welds can be tested and the part can be used for its intended purpose.

Question 31

Which of the following is true of penetrant inspection?

A) There are two types penetrants used: color contrast, and fluorescent.
B) It is a form of destructive testing.
C) It requires the use of an x-ray machine.
D) Protective eyewear should be worn to prevent serious burns from the acid used.

Question 32

Which of the following is true of magnetic particle inspection?

A) The magnetic field is always at right angles to the direction of current flow.
B) Once a part has been magnetized it can no longer be used for its intended purpose.
C) Protective eyewear should be worn to prevent injury from ferromagnetic particles.
D) Discontinuities that are perpendicular to the source may not be seen.

Question 33

The difference between what is acceptable, fit for service, and perfection is known as ____________________.

Question 34

​What term is use to describe the fact that not enough filler metal was added to the weld groove?

A) ​low-weld bead
B) ​under welding
C) ​underfill
D) ​inadequate welding filler metal

Question 35

When using hydrochloric acid in an etch test, the proportion of concentrated hydrochloric acid to water is ____.

A) one to one
B) two to one
C) nine to one
D) one to nine

Question 36

​What can cause small localized hard spots on the metal surface?

A) ​too high of a welding current setting
B) ​arc strikes
C) ​slag popping
D) ​the wrong shielding gas

Question 37

​What type of discontinuity can be expected if prior welds were improperly cleaned?

A) ​Porosity
B) ​Inclusions
C) ​Overlap
D) ​Undercut

Question 38

​The acceptance criteria for all inspections are based on______________.

A) ​the federal government's requirements from the Bureau of Standards
B) ​internationally accepted codes and standards
C) ​local and state building code requirements
D) ​welding engineers' reports and recommendations

Question 39

​What problem can be caused by improper joint fitup or not enough welding current?

A) ​incomplete fusion
B) ​cracks
C) ​lamellar tears
D) ​metallic inclusions

Question 40

​Which of the following might result in linear slag inclusions?

A) ​Improper shielding gas flow on a GTA weld.
B) ​wormholes
C) ​Making a SMA weld over a highly crowned previous weld.
D) ​Too high of a welding current in the vertical up position.

Question 41

____________________ testing is used to determine how well a weld can resist repeated fluctuating stresses or cyclic loading.

Question 42

____________________ inclusions can resemble porosity, but, unlike porosity, they are generally not spherical.

Question 43

What causes crater cracks and how can they be prevented?

Question 44

Explain how ultrasound can be used for weld inspection.

Question 45

In a(n) ____________________ test, two specimens are prepared and tested, one face bend and one root bend.

Question 46

Explain the causes for lamellar tears and how they can be prevented.

Question 47

____________________ may result from sharp notches between weld beads or between the weld bead and the base metal that trap materials so that they cannot float out.

Question 48

____________________ is the most frequently used nondestructive testing method.

Question 49

Explain how eddy current inspection works.

Question 50

Arc strikes will always appear when an acid ____________________ is used.

Question 51

Explain how a magnetic field can be used to test the soundness of a weld.

Question 52

____________________ has the capacity to etch rapidly and should be used on polished surfaces only.