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Inspections > NDT/NDI Review > Flashcards

NDT/NDI Review Flashcards

1
Q

What are the two most common hardness testers used in industry, that we discussed in class?

A
  • Brinell

- Rockwell

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2
Q

TYPE OF HARDNESS TESTER

Measures diameter of impression of hardened spherical ball;

Hydraulic actuation + Calibrated microscope

A

Brinell

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3
Q

TYPE OF HARDNESS TESTER

Measures depth indicated by dial;

Two penetrants = Diamond cone (for harder material) & Hardened steel ball (softer material).

A

Rockwell

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4
Q

The Hardness tester that uses a hardened spherical ball and measures the diameter of the penetration of the ball to determine hardness would be the?

A

Brinell Tester

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5
Q

3 tools that an AME should have to carryout visual inspections:

A

Bright light
Magnifying glass
Mirror

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6
Q

When inspecting for a surface defect using visual inspection and a flashlight, what angle’s to the inspection surface should the light be held at toward the face?

A

5-45 degree angle

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7
Q

What power magnifying glass should be used to confirm the existence of a crack(the most common one used in our industry)

A

10 power (10x)

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8
Q

What tool would an AME use to inspect the inside of an engine cylinder for corrosion or wear with the cylinder still installed on the engine?

A

Boroscope

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9
Q

What tool provides the user with an image on a screen and can be used to inspect areas not accessible with the naked eye or mirror?

A 
Fiberoptic Scope (Boroscope)
Videoscope
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10
Q

What type of NDT inspection can be used to detect CRACKS open to the surface only?

A

penetrant inspection

liquid penetrant

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11
Q

When looking for surface cracks it is important not to clean away paint or dirt using sanding, scraping, brushing or abrasive blasting, why?

A

these methods may close of the discontinuities on the surface and will hide any defects.

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12
Q

When using fluorescent penetrant what kind of light is needed to illuminate the penetrant?

A

black light

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13
Q

The recommended time that penetrant is left on the surface before it is cleaned off and developer applied is called what?

A

Dwell time

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14
Q

NDT method that detects cracks on or near the surface in ferrous metals such as engine crankshaft.

A

Magnetic particle Inspection

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15
Q

Ultrasonic inspection uses what form of energy moving through the specimen to detect flaws?

A

Sound Energy

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16
Q

When performing eddy current inspection a reference piece is used, what is the test piece made from?

A

A reference Standard (test pieces) is made from the same material as the item being tested.

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17
Q

3 basic ultrasonic inspection methods:

A
  • Pulse Echo
  • Through Transmission
  • Resonance
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18
Q

What type of magnetism is used when looking for subsurface cracks?

A

Magnalo DC Inspection for SUBSURFACE cracks

Magnalo AC Inspection for SURFACE cracks

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19
Q

What kind of instrument is used to check a part for residual magnetism after inspection?

A
  • Flux gauges
  • Gauss
  • Magnetic Field Strength Meter
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20
Q

Type of NDT method that can be used to determine a materials alloy and heat-treat condition?

A

Eddy Current

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21
Q

What are the two basic procedures used in ultrasonic inspection?

A

Immersion Testing

Contact Testing

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22
Q

What is the most accurate statement about a properly designed welded joint?

A

A properly designed joint weld is stronger than the base metal that it joins.

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23
Q

How much penetration should a butt weld have?

A

100% of the thickness of base metal

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24
Q

What two forms of NDT can be used to inspect bonded structures?

A

Ultrasonic inspection

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25
Q

What kind of weld joint requires the weld have 25% to 50% penetration of the base metal thickness?

A

fillet weld

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26
Q

What is the most basic method an AME can use to check for delamination of a bonded structure?

A

coin tap test

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27
Q

What kind of tests are used to determine a fabrics airworthiness?

A

Punch test and Pull/Grab test

28
Q

Who is the governing body in Canada for NDT?

A

Canadian General Standards Board (CGSB)

29
Q

Who is the certifying body for NDT in Canada?

A

National Non-Destructive Testing Certificaton Body (NNDTCB )

30
Q

What are the four NDT methods that have alternate training requirements in the CARS that alleviates certification under the national standards?

A
  • Liquid Penetrant
  • Magnetic Particle inspection
  • Eddy Current
  • Ultrasonic inspections
31
Q

What is the hardness tester that measures depth of penetration?

A

Rockwell tester

32
Q

2 types of penetrators used with the rockwell tester?

A
  • Diamond cone

- Hardened ball steel

33
Q

What are two fabric puncture testers called we discussed?

A

sayboth and maule tester

34
Q

When doing a tap test what defects can be detected?

A

delamination and debonding

35
Q

What indicates a defective area when doing a tap test?

A
  • flat or dead ring out

- dull sound

36
Q

hairline cracks in plastic due to age exposure to sun and stress.

A

crazing

37
Q

What optical device can be used to inspect the edge of a plastic window that is obscured by aircraft fairings or skin?

A

Prism inspection

38
Q

What kind of material can liquid penetrant insp be used on to detect flaws?

A
  • Nonporous materials>metals>ceramics, plastics -molded rubber,
  • glass.
39
Q

What is the limiting factor when using liquid penetrant insp?

A

Defect must be OPEN TO SURFACE in order to let penetrant get into the defect

40
Q

How can liquid penetrant be applied?

A

Sprayed, brush, or submerged

41
Q

What kind of material can magnetic particle insp be used on to detect defects?

A

method of detecting invisible cracks and other defects in ferromagnetic materials(ferrous metals), such as iron and steel.

42
Q

What kind of particles are used when carrying out mag particle insp?

A

ferromagnetic particles

43
Q

What kind of magnetism is used to detect surface cracks?

A

Magnaglow AC Magnetism Inspection

44
Q

What is formed across a crack that particles are attracted to during mag particle insp?

A

A new North and South Pole

45
Q

How is longitudinal magnetism created?

A

Run coil around an Iron Core and run current through that AC/DC = look for cracks perpendicular to length

46
Q

How is circular magnetism created?

A

Pass current through AC/DC = magnetized circular. Detect cracks/faults run lengthwise of part

47
Q

What must be done to a part after Mag particle insp?

A

Demagnetize to prevent disturbance from mag field)

48
Q

Mag particle insp that used fluorescent dyed particles is referred to as what?

A

Magnaglo Inspection

49
Q

What kind of material can eddy current insp be used on?

A

ferrous and non ferrous metals

50
Q

What kind of preparation is required before doing eddy current insp?

A

Calibration/Reference Standard

51
Q

What does a reference standard contain (test block)?

A

Contains known flaws or cracks

52
Q

What is a reference standard made from?

A

Made from the same material as the item being tested.

53
Q

______ ______ are induced in a test article when AC is applied to a test coil (probe). The AC in the coil induces an alternating magnetic field in the article, causing _____ _____ to flow in the article

A

Eddy currents, eddy currents

54
Q

What influences the flow of eddy currents in a test piece?

A

Flaws in or thickness changes of test piece

55
Q

The coil is located at the end of the test probe what measurement is taken from the coil that indicates a defect in the test material?

A
  • Impedence (resistance of an electric circuit or component to Alternating Current)
  • Variation
56
Q

What kind of material can ultrasonic insp be used on?

A

all types

57
Q

How many sides need to be accessible when using the pulse echo method of ultrasonic insp?

A

Only ONE side for pulse echo

58
Q

The two procedures used for ultrasonic insp are?

A
  • Immersion Testing (Immersed in liquid coupulant)

- Contact Testing (coupled by viscous material, liquid, or a paste wetting both face and search unit)

59
Q

What procedure of ultrasonic insp is used best for field use?

A

contact testing

60
Q

How many side need to be accessible when using the through transmission method of ultrasonic insp?

A

TWO opposite sides needed to be accessible

61
Q

How many display patterns are used with ultrasonic insp?

A

There are three types of display patterns: “A” scan, “B” scan, and “C” scan.

62
Q

When C/O Ultrasonic testing using the contact procedure(pulse echo) what is used between the transducer and the test material?

A

Viscous material, liquid, paste, or a gel that wets both face of transducer and material under examination

63
Q

What form of NDT uses straight line and angle beam testing techniques?

A

Ultrasonic inspection

64
Q

Xray insp can be used on what kinds of material?

A

Metal fabrications and non-metallic products

65
Q

What will a crack or defect appear as on an xray?

A

Black line? Dark lines?

66
Q

What form of ultrasonic insp can be use to check the thickness of pipes?

A

Resonance

67
Q

What form of ndt can be used on whole airframe or engine structure?

A

Xray/Radiographic Inspection

Inspections (10 decks)

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