fml3 Flashcards by Akram Awatta

Can the GMAW process use a constant voltage as well as a constant current power source?

yes

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The position for the electoslag welding process is: (Multiple Choice)
Question options:

A) vertical down.

B) flat.

C) horizontal.

D) vertical up.

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The EBW process was originally developed to: (Multiple Choice)
Question options:

A) complete thick section welds in one pass.

B) weld refractory and reactive metals.

C) deposit hard surfacing overlays.

D) compete with the GTAW process.

B) weld refractory and reactive metals.

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SAW fluxes are: (Multiple Choice)
Question options:

A) classified on their own. They have their own separate designation.

B) not classified. Only the wire is classified.

C) classified in conjunction with the welding wire forming a flux-wire designation.

D) all classified with EM12K wire. Use with other wires would require testing.

C) classified in conjunction with the welding wire forming a flux-wire designation.

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What is the minimum number of diodes necessary to produce a full-wave rectified waveform? (Multiple Choice)
Question options:

A) 5 diodes

B) 4 diodes

C) 1 diode

D) 3 diodes

B) 4 diodes

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What is the preferred polarity for GMAW and FCAW? (Multiple Choice)
Question options:

A) DCEN

B) DCEP

C) AC

D) AC balanced

B) DCEP

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To preserve the chemistry for multiple layer SAW applications the flux should be: (Multiple Choice)
Question options:

A) active.

B) basic.

C) neutral.

D) not important, as the mixture will neutralize.

C) neutral.

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Restraint can be defined as: (Multiple Choice)
Question options:

A) the rigidity of the joint prior to welding.

B) stresses caused by external forces.

C) internally self-balanced stresses.

D) the force produced per unit length of the joint.

A) the rigidity of the joint prior to welding.

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What is the difference between transverse shrinkage and longitudinal shrinkage in a butt joint? (Multiple Choice)
Question options:

A) No difference at all

B) In longitudinal shrinkage the weld cracks

C) In transverse shrinkage the weld does not crack

D) In longitudinal shrinkage the weld shrinks longitudinally

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Why is the use of a carbon steel fixture not allowed to contact stainless steel directly? (Multiple Choice)
Question options:

A) It may cause corrosion

B) It may change the mechanical characteristics of stainless steel

C) Steel is not an effective fixture

D) It may be difficult to separate both metals after heating

A) It may cause corrosion

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Compare the steel alloying elements listed below. Which element will provide the maximum benefit for impact and abrasion applications? (Multiple Choice)
Question options:

A) Lead

B) Oxygen

C) Aluminum

D) Manganese

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Metals have a crystalline structure in which atoms are arranged in irregular patterns

false

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The addition of carbon to steel increases strength but lowers: (Multiple Choice)
Question options:

A) toughness.

B) hardness.

C) yield point.

D) ultimate tensile strength.

A) toughness.

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The solidification structure that results from a slow welding speed can be described as: (Multiple Choice)
Question options:

A) an elongated weld pool with solidifying crystals growing from the sides towards each other

B) a short weld pool with solidifying crystals growing from the back of the pool

C) an elongated weld pool with solidifying crystals growing from the back of the pool

D) a short weld pool with solidifying crystals growing from the sides towards each other

B) a short weld pool with solidifying crystals growing from the back of the pool

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Which one of the following processes produce the wider HAZ?
Question options:

A) Shielded metal arc welding

B) Submerged arc welding

C) Electron beam welding

D) Electroslag welding

C) Electron beam welding

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Which of the following processes generate the highest rate of dilutiion? (Multiple Choice)
Question options:

A) GTAW

B) SMAW

C) SAW

D) GMAW

C) SAW

What procedure would be used to complete a butt joint in an austenitic stainless steel clad carbon steel plate? (Multiple Choice)
Question options:

A) Complete the joint using an E4918 electrode

B) Complete the stainless side first using an austenitic stainless steel filler metal and then the carbon steel side using an E4918 electrode

C) Complete the carbon steel side first using an E4918 electrode and then the stainless steel side using an austenitic stainless filler metal.

D) Butter the carbon steel side using an austenitic filler metal and then fill with an E4918 electrode.

C) Complete the carbon steel side first using an E4918 electrode and then the stainless steel side using an austenitic stainless filler metal.

What is the preferred method of joining duplex stainless steels? (Multiple Choice)
Question options:

A) it is preferable to weld with the lowest heat input possible using similar procedures

B) It is preferable to weld with the lowest heat input possible using a high alloy austenitic filler such as a 309 type.

C) It is preferable to weld with the highest heat input possible consistent with acceptable properties and weldability

D) it is preferable to weld with the smallest possible electrode size using stringer beads throughout.

C) It is preferable to weld with the highest heat input possible consistent with acceptable properties and weldability

What consumable would be used to butter a steel plate to a martensitic stainless steel? (Multiple Choice)
Question options:

A) 304

B) 308

C) 309

D) 316

C) 309

A 410 stainless steel will form martensite if it is: (Multiple Choice)
Question options:

A) air cooled.

B) water quenched.

C) oil quenched.

D) annealed.

E) normalized.

A) air cooled.

Which of the following stainless steels has the best creep strength? (Multiple Choice)
Question options:

A) The austenitic 304H grade

B) The austenitic 304L grade

C) The 2205 duplex grade

D) The 410 grade

A) The austenitic 304H grade

What maximum surface temperature can dry magnetic particle media normally withstand? (Multiple Choice)
Question options:

A) 100 °C

B) 300 °C

C) 52 °C

D) There is no maximum

B) 300 °C

How are shorter wave lengths produced from an x-ray tube? (Multiple Choice)
Question options:

A) by increasing the beam current.

B) by reducing the voltage.

C) by reducing the beam current.

D) by increasing the voltage.

Film speed for best contrast? (Multiple Choice)
Question options:

A) fast, medium grained.

B) medium speed, medium grained.

C) slow speed, fin grained.

D) very slow speed, extra fine grained.

The acceptance criteria for evaluation of a radiographed weld is: (Multiple Choice) Question options: A) subject to the governing procedure used. B) specified by the governing inspector. C) specified by the governing certifying agency. D) specified in the governing fabrication standard.

D) specified in the governing fabrication standard.

A material that may require a special technique for UT examination is: (Multiple Choice) Question options: A) carbon steel used in a pressure vessel. B) austenitic stainless steel. C) structural steel for bridges. D) steels for pressure vessels.

B) austenitic stainless steel.

The amplifier in the ultrasonic testing circuit regulates: (Multiple Choice) Question options: A) the vertical beam deflection. B) the horizontal time-base. C) the gate's size. D) the frequency.

A) the vertical beam deflection.

In what unit is the gain control (or attenuator) marked? (Multiple Choice) Question options: A) m/s B) MHz C) mm/s D) decibels

D) decibels

The first item that should be checked or calibrated on an angle probe is: (Multiple Choice) Question options: A) wavelength. B) the angle. C) linearity. D) the exit (index) point.

D) the exit (index) point.

Which type of display gives a cross-sectional view showing the length and depth of discontinuities? (Multiple Choice) Question options: A) A-Scan B) C-Scan C) P-Scan D) B-Scan

D) B-Scan

Parts are sometimes immersed in water in order to examine them. The probe's distance from the water surface to the part needs to be removed from the display using: (Multiple Choice) Question options: A) sweep scale expansion key adjustments. B) sensitivity key adjustment. C) DAC key adjustment. D) delay key adjustment.

D) delay key adjustment.

The wavelength is the distance: (Multiple Choice) Question options: A) between the crests of the waves. B) of one loop of wave. C) between two molecules in straight line. D) between two points at any direction.

A) between the crests of the waves.

Light, radio waves, microwaves, gamma rays, and X-rays are all forms of: (Multiple Choice) Question options: A) radiation. B) ultrasonic waves. C) electromagnetic waves. D) pulse waves.

C) electromagnetic waves.

Dye penetration reveals which kind of discontinuities? (Multiple Choice) Question options: A) Surface only B) Subsurface porosity and deep cracks C) Surface and subsurface linear and round indications D) Only relevant indications

A) Surface only

The magnetism that stays within a part after the magnetizing field is removed is called: (Multiple Choice) Question options: A) coercive force. B) permanence. C) retentivity. D) residual magnetism.

D) residual magnetism.