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chapter 3 > fml 5 > Flashcards

fml 5 Flashcards

1
Q

The strength of the magnetic field, and therefore the pinch effect, depends mostly on: (Multiple Choice)
Question options:

A) current density.

B) voltage and wire size.

C) travel speed.

D) arc length.

A

A) current density.

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2
Q

GTAW electrodes may be ground to the shape of a cone. What is the effect of a large vertex angle on weld bead width? (Multiple Choice)
Question options:

A) The bead width is reduced

B) The bead width is increased

C) The is no effect

D) The bead width becomes irregular

A

A) The bead width is reduced

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3
Q

The two systems that can be used to adjust the output of a transistor welding power source are: (Multiple Choice)
Question options:

A) tapped transformer and SCR.

B) SCR and inverter.

C) frequency and pulse width modulation.

D) peak voltage and current feedback.

A

D) peak voltage and current feedback.

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4
Q

Can you use solid welding wires without copper coating? (Multiple Choice)
Question options:

A) Yes

B) No

A

A) Yes

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5
Q

In what application is back-stepping or the skip welding technique normally applied ? (Multiple Choice)
Question options:

A) Fillet welding

B) Spot welding

C) Heavy plate welding

D) Ship building or in large fuel tanks

A

D) Ship building or in large fuel tanks

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6
Q

Is there any thermal expansion on mild steel after 800 °C? (Multiple Choice)

Question options:

A) Not much

B) A lot

C) Steel actually shrinks

D) Steel expands exponentially

A

A) Not much

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7
Q

Which elements are added to molten steel specifically for deoxidation purposes? (Multiple Choice)
Question options:

A) Manganese and oxygen

B) Silicon and oxygen

C) Manganese and aluminum

D) Carbon and manganese

A

C) Manganese and aluminum

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8
Q

Elements commonly used to form substitutional solid solutions include: (Multiple Choice)
Question options:

A) nitrogen.

B) carbon.

C) copper.

D) oxygen.

A

C) copper.

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9
Q

The most predominant cracking in high strength low alloy steel (HSLA) is in the: (Multiple Choice)
Question options:

A) heat-affected zone.

B) weld metal zone.

C) either zones.

D) None of the above

A

B) weld metal zone.

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10
Q

Since creep failure is a condition that occurs at grain boundaries, what aspect of these grain boundaries increases creep strength? (Multiple Choice)
Question options:

A) Smaller grain size improves creep strength by increasing grain boundary area.

B) Grains must be orientated in all directions

C) Grain boundaries that contain voids will cause relaxation and improve creep strength

D) Larger grain size improves creep strength by reducing grain boundary area.

A

D) Larger grain size improves creep strength by reducing grain boundary area.

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11
Q

High energy input welds typically result in: (Multiple Choice)
Question options:

A) large ASTM grain size numbers.

B) small ASTM grain size numbers.

C) elongated grains.

D) thin grains.

A

B) small ASTM grain size numbers.

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12
Q

Stainless steels acquire their special properties because of the presence of: (Multiple Choice)
Question options:

A) more than 10% nickel.

B) more than 7% chromium.

C) more than 10% chromium.

D) more than 3% molybdenum.

A

C) more than 10% chromium.

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13
Q

Sensitization in the HAZ of an AISI 304 austenitic stainless steel can be caused by: (Multiple Choice)
Question options:

A) the formation of small copper precipitates during slow cooling.

B) the formation of titanium or tantalum carbides.

C) the formation of chromium carbides.

D) a solution heat treatment.

A

C) the formation of chromium carbides.

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14
Q

Which of the following phases is the least prone to hydrogen-induced cold cracking (HICC)? (Multiple Choice)
Question options:

A) Martensite

B) FCC austenite

C) Bainite

D) BCC ferrite

A

B) FCC austenite

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15
Q

Is it good practice to have more or less chromium in the welding electrode compared to the base metal? (Multiple Choice)
Question options:

A) It all depends on the welder

B) There should always be less chromium

C) There should always be more chromium

D) No, it is not good practice

A

C) There should always be more chromium

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16
Q

The strength of the 200 series of stainless steels is increased by the addition of: (Multiple Choice)
Question options:

A) nickel.

B) chromium.

C) carbon.

D) nitrogen.

E) manganese.

A

D) nitrogen.

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17
Q

What is the bend test used for? (Multiple Choice)
Question options:

A) Testing welding procedures and material toughness

B) Measuring the elasticity of steel

C) Evaluating the ductility and strength of steel

D) Testing of welders and welding procedures

A

C) Evaluating the ductility and strength of steel

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18
Q

Charpy impact tests provide comparative data that can be used for: (Multiple Choice)
Question options:

A) defining the fracture toughness of different materials.

B) qualification or quality control checks on materials.

C) determining the strength of different materials.

D) qualification of welder, tack welder, and welding operators.

A

C) determining the strength of different materials.

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19
Q

Visible dye and fluorescent dye are further categorized by: (Multiple Choice)
Question options:

A) dwell times.

B) method of application.

C) method of removal.

D) viscosity.

A

A) dwell times.

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20
Q

Eddy current reveals which kind of discontinuities? (Multiple Choice)
Question options:

A) Surface only

B) Subsurface only

C) Surface and subsurface

D) Those comparable to UT

A

C) Surface and subsurface

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21
Q

In conventional ultrasonic theory, the wave is injected into the specimen as a: (Multiple Choice)
Question options:

A) continuous wave at the natural frequency of the transducer.

B) short pulse containing several oscillations at the natural frequency.

C) long pulse containing several oscillations at the natural frequency.

D) mechanical vibration.

A

B) short pulse containing several oscillations at the natural frequency.

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22
Q

The energy carried by a wave depends on: (Multiple Choice)
Question options:

A) amplitude and velocity.

B) velocity and frequency.

C) wave length and frequency.

D) amplitude and frequency.

A

D) amplitude and frequency.

23
Q

How is the amount of exposure measured in a thermoluminescent dosimeter (TLD)? (Multiple Choice)
Question options:

A) By a small scale that can be read directly from a charged quartz fibre.

B) By the amount of blackening on the film.

C) By hearing a high pitched audible alarm usually worn on a belt.

D) By gently heating to release trapped radiation and measuring it.

A

D) By gently heating to release trapped radiation and measuring it.

24
Q

Definition is influenced by: (Multiple Choice)
Question options:

A) the inherent sharpness and geometric unsharpness.

B) the geometric sharpness due to the rays passing through the photographic film.

C) the geometric unsharpness due to fuzziness at the edge of the image.

D) the distance from the film to the source only.

A

A) the inherent sharpness and geometric unsharpness.

25
Q

The energy carried by a wave is proportional to the square of the amplitude. (True/False)
Question options:
True
False

A

True

26
Q

Archival quality refers to the: (Multiple Choice)
Question options:

A) time which the radiographs must be kept.

B) fading of the image.

C) density used on the film.

D) location of storage.

A

A) time which the radiographs must be kept.

27
Q

What limits AC to surface only detection? (Multiple Choice)
Question options:

A) Flux build up

B) Alternating current flow

C) Lower currents

D) External flux leakage

E) Subsurface interference

A

B) Alternating current flow

28
Q

When using potential drop inspection, the measured value of the drop will: (Multiple Choice)
Question options:

A) increase with an increasing discontinuity size.

B) decrease with an increasing discontinuity size.

C) stay the same.

D) vary with the square of the applied resistance.

A

B) decrease with an increasing discontinuity size.

29
Q

The coils in yokes have a large number of turns that produce current magnitudes of: (Multiple Choice)
Question options:

A) 50 to 100 amps

B) 1000 to 1500 amps

C) 5 to 10 amps

D) 100 amps per inch

A

B) 1000 to 1500 amps

30
Q

Permanent set is: (Multiple Choice)
Question options:

A) the point just beyond UTS.

B) the amount of plastic deformation.

C) the elastic deformation minus the original length.

D) the yield elongation minus the ultimate tensile strength.

A

B) the amount of plastic deformation.

31
Q

What best describes proof testing? (Multiple Choice)
Question options:

A) Tensile and creep testing

B) Electrostatic testing

C) Corrosion testing.

D) Overload testing

A

D) Overload testing

32
Q

CTOD testing of materials measures the resistance of the material to crack extension and depends on: (Multiple Choice)
Question options:

A) thickness, temperature, and crack susceptibility.

B) temperature, thickness, loading rate, and local microstructure.

C) toughness, temperature, and loading rate.

D) temperature, toughness, and thickness.

A

A) thickness, temperature, and crack susceptibility.

33
Q

On a thin plate, the cooling rate is more sensitive to heat input and doubling the heat input will: (Multiple Choice)
Question options:

A) reduce the cooling rate four times.

B) reduce the cooling rate by half.

C) double the cooling rate.

D) not affect the cooling rate.

A

B) reduce the cooling rate by half.

34
Q

In the A-scan display, the vertical displacement of the trace represents: (Multiple Choice)
Question options:

A) the amplitude of the reflected wave.

B) the size of the reflector.

C) distance.

D) time.

A

A) the amplitude of the reflected wave.

35
Q

The screen used to display the echoes during ultrasonic testing is referred to as the: (Multiple Choice)
Question options:

A) protective screen.

B) thermo-luminescent screen.

C) cathode ray tube (CRT).

D) silicon controlled rectifier screen (SCR).

A

C) cathode ray tube (CRT).

36
Q

Why should TOFD always be supplemented by a conventional pulse-echo examination? (Multiple Choice)
Question options:

A) There is no need

B) Because it has two blind zones where it is not sensitive to defects

C) It has only one zone that is not sensitive to defect

D) It is only sensitive the far wall zone

A

B) Because it has two blind zones where it is not sensitive to defects

37
Q

The change in direction of an incident sound wave below the surface is know as: (Multiple Choice)
Question options:

A) refraction.

B) incident sound beam.

C) reflection.

D) echo.

A

A) refraction.

38
Q

To overcome the spurious indications of large grain welds, it is recommended that: (Multiple Choice)
Question options:

A) high frequency, large diameter transducers be used.

B) low frequency, small diameter transducers be used.

C) low frequency, large diameter transducers be used.

D) high frequency, small diameter transducers be used.

A

C) low frequency, large diameter transducers be used.

39
Q

Electromagnetic radiation with wavelengths longer than visible light are: (Multiple Choice)
Question options:

A) infrared, ultraviolet, and x-rays.

B) gamma rays, microwave, and radio waves.

C) radio, microwaves, and infrared rays.

D) X-rays, gamma rays, and ultraviolet.

A

C) radio, microwaves, and infrared rays.

40
Q

An alternate NDE method that utilizes magnetic tape to record flux patterns is called: (Multiple Choice)
Question options:

A) magnetic resonance testing.

B) leak detection.

C) eddy current testing.

D) the flux leakage method

A

D) the flux leakage method

41
Q

Which type of metallographic test is used for grain size determination? (Multiple Choice)
Question options:

A) Charpy impact test

B) Macro exams

C) Micro exams

D) Corrosion testing

A

C) Micro exams

42
Q

Toughness is a measure of the ability of a material to: (Multiple Choice)
Question options:

A) bend under load.

B) handle stresses.

C) resist the growth of a crack.

D) retract after the load is released.

A

D) retract after the load is released.

43
Q

What type of testing is traditionally used to give an indication of how large an internal crack must be to cause brittle fracture? (Multiple Choice)
Question options:

A) Izod test

B) Charpy test

C) Tensile test

D) Fracture mechanics test

A

C) Tensile test

44
Q

Brinell hardness numbers (HB) between 200 and 400 correlate to tensile strength? How is this done? (Multiple Choice)
Question options:

A) Multiply the HB number by 1000

B) Divide the HB number by 500

C) Divide the HB number by 1000

D) Multiply the HB number by 500

A

D) Multiply the HB number by 500

45
Q

What type of consumable is preferred for a martensitic weldment if hardness is not a major factor? (Multiple Choice)
Question options:

A) Austenitic stainless steel

B) Matching composition

C) Basic mild steel electrode

D) Nickel-based electrode

A

A) Austenitic stainless steel

46
Q

What types of stainless steel are not able to undergo phase transformations on heating and cooling? (Multiple Choice)
Question options:

A) Pearlitic and ferritic

B) Ferritic and austenitic

C) Martensitic and precipitation hardening

D) Austenitic and precipitation hardening

A

B) Ferritic and austenitic

47
Q

Stainless steel for domestic cutlery is: (Multiple Choice)
Question options:

A) ferritic.

B) austenitic.

C) duplex.

D) martensitic.

A

B) austenitic.

48
Q

What is the heat input efficiency of the SMAW process? (Multiple Choice)
Question options:

A) 65 - 85%

B) 50 - 85%

C) 20 - 50%

D) 90 - 95%

A

B) 50 - 85%

49
Q

Good fracture toughness normally requires: (Multiple Choice)
Question options:

A) a coarse grain structure.

B) a fine grain structure.

C) unrestricted growth of austenite grains.

D) use of a high heat input process such as electroslag.

A

B) a fine grain structure.

50
Q

What kind of carbon content is used for cold chisels and band saws? (Multiple Choice)
Question options:

A) The carbon will be more than 1.7%

B) The carbon will in the range 0.50 to 0.80%

C) The carbon will be in the range 0.03 to 0.08%

D) The carbon will be in the range 1.2% to 1.4%

A

B) The carbon will in the range 0.50 to 0.80%

51
Q

When making steel, the first process is to convert iron ore into pig iron. Which furnace is used for this process? (Multiple Choice)
Question options:

A) Open hearth furnace

B) Basic oxygen furnace

C) Electric furnace

D) Blast furnace

A

D) Blast furnace

52
Q

Carbon dissolved completely in the FCC structure of steel is known as: (Multiple Choice)
Question options:

A) pearlite.

B) martensite.

C) ferrite.

D) austenite.

A

D) austenite.

53
Q

Interstitial solid solutions are commonly formed with: (Multiple Choice)
Question options:

A) iron.

B) nickel.

C) silicon.

D) carbon and nitrogen.

A

D) carbon and nitrogen.

54
Q
A

chapter 3 (14 decks)

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