Deck 25: Testing and Inspection

Question 1

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

Answer 1

D

Question 2

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

Answer 2

D

Question 3

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

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

Answer 3

C

Question 4

____ 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

Question 5

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 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

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 8

____ 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 9

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 10

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

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

Question 11

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 12

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 13

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 14

____ 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 15

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 16

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 17

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 18

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

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

Question 19

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 20

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 21

What causes crater cracks and how can they be prevented?

Question 22

The four wheels beneath a railroad car are referred to as a(n) ____________________.

Question 23

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 24

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) Incorrect shielding gas

Question 25

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

Question 26

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

Question 27

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

Question 28

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

A) Delamination
B) Lamination
C) Lamellar tear
D) Linear slag inclusions

Question 29

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

Question 30

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

Question 31

Using a(n) ____________________ is an alternative nonstandard way of looking at what is hidden beneath the surface of a weld.

Question 32

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

A) Inadequate joint penetration
B) Cracks
C) Lamellar tears
D) Metallic inclusions

Question 33

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

Question 34

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

Question 35

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

A) Izod
B) Charpy
C) Acid
D) Nick-break

Question 36

What is the most frequently used nondestructive test?

A) Visual inspection
B) Penetrant inspection
C) Magnetic particle inspection
D) Radiographic inspection

Question 37

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 38

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

Question 39

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 40

What term is used 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 41

Explain how eddy current inspection works.

Question 42

Explain how ultrasound can be used for weld inspection.