NDT

Question 1

Eddy Current Factors (7)

Answer 1

1. Conductivity
2. Permeability
3. Frequency
4. Geometry
5. Proximity
6. Probe
7. Defects

Question 2

Eddy Current Probes (3)

Answer 2

1. Absolute
2. Differential
3. Reflection

Question 3

Liquid Penetrant Inspection Steps (8)

Answer 3

1. Surf prep & pre-cleaning
2. Apply Penetrant
3. Penetrant dwell time
4. Remove excess penetrant
5. Apply Developer
6. Developer Dwell Time
7. Inspection
8. Post-cleaning

Question 4

Gear failures (5)

Answer 4

1. Pitting
2. Micro-pitting
3. Scuffing
4. Bending fatigue
5. Wear

Question 5

Fasterner Failure (5)

Answer 5

1. Bending
2. Shear
3. Shear out/tear out
4. Tensile rupter
5. Bearing stress

Question 6

Access Panels (3)

Answer 6

1. Dzus
2. Camlock
3. Airloc Cowling

Question 7

Special Fasterners (6)

Answer 7

1. Lock bolt
2. Hi lok
3. Hi lite
4. Hi tigue
5. Taper lok
6. Jo bolt

Question 8

Rivets (7)

Answer 8

1. Cherry Max (bimetallic)
2. Pop
3. Friction lock
4. Mech
5. Hi shear
6. Self piercing

Question 9

Mech Rivets (4)

Answer 9

1. Huck loks
2. Cherry loks
3. Olympic loks
4. Cherry Max

Question 10

Liquid Penetrant Form (A, B, C, D, E)

Answer 10

A. Dry powder
B. Water soluble
C. Water suspendable
D. Non-aqueous type 1
E. Non-aqueous type 2

Question 11

Liquid Penetrant Adv (5)

Answer 11

1. Cheap
2. High contrast
3. Aerosol spray cans - portable
4. Larger flaw indications
5. Indications are produced on part surface (visual indication)

Question 12

Liquid Penetrant Disadv (3)

Answer 12

1. Only surface breaking defect
2. Only non-porous surface
3. Pre-cleaning is impt

Question 13

Penetrant Removal Methods (A, B, C, D)

Answer 13

A. Water washable
B. Lipophilic Emulsifier (oil based)
C. Solvent wipe
D: Hydrophilic Emulsifier (water based)

Question 14

Ultrasound probes (4)

Answer 14

1. Delay Line Transducer
2. Angle Beam Transducer
3. Contact Transducer
4. Phased Array Transducer

Question 15

X-ray defects decernibility and image quality

Answer 15

Geo effect:

1. Source size
2. Source to obj dist
3. Defect to film dist

Quality of radiation
Quality of detector

Question 16

Main properties of x-ray/gamma ray (5)

Answer 16

1. Travel at straight line at speed of light
2. Can’t be deflected by lens/prism
3. Highly penetrating, pass through objects. Partly absorbed in transmission.
4. Can’t be perceived by human senses
5. Ionising; can impair/destroy living cells