NDI Block 6 Study

The internal configuration of the bonded test part must be understood by the ___.

• sergeant

• operator

• engineers

• T.O.

What may harm the material under evaluation?

• Grease pencils, chalk, or other marking device

• Tap hammer

• USN-60/EPOCH 650

• Grease pencils, tap hammer, or other marking device

What is NOT a variable consideration?

• accessibility (one skin or both skin available)

• underlying structure- core material, thickness of core, cell size, etc.

• probe- side skin material and thickness

• adhesive type and thickness

• two or more objects or parts coherence

What is NOT an underlying structure?

• foam adhesive and steps in skins

• core material, thickness of core

• cell size and thickness of cell wall

• far-side skin material and thickness

• adhesive type and thickness

What is bond?

• Voids in foam adhesive or unbonds between the adhesive and a closure member at core-closure member joints

• An area within a bonded interface between two adherents in which the intended bonding action failed to take place (Type I, II, IV and strandards)

• Separation at an adhesive bond line in a bonded joint (Type I, II, IV)

• A substance or agent that causes two or more objects or parts to cohere

What is disbond?

• Delaminations or voids between layers of a laminate

• An area within a bonded interface between two adherents in which the intended bonding action failed to take place (Type I, II, IV and strandards)

• Separation at an adhesive bond line in a bonded joint (Type I, II, IV)

• A substance or agent that causes two or more objects or parts to cohere

What is unbond?

• Voids at the adhesive-to-core interface

• An area within a bonded interface between two adherents in which the intended bonding action failed to take place (Type I, II, IV and strandards)

• Separation at an adhesive bond line in a bonded joint (Type I, II, IV)

• A substance or agent that causes two or more objects or parts to cohere

A delamination is a separation in layers of laminate (Type III)

• True

• False

What is a Type I bonded defect?

• Voids in foam adhesive or unbonds between the adhesive and a closure member at core-closure member joints

• Delaminations or voids between layers of a laminate

• Unbonds or voids in an outer skin-to-adhesive interface

• Unbonds or voids at the adhesive-to-core interface

• Water in the core

What is a Type II bonded defect?

• Voids in foam adhesive or unbonds between the adhesive and a closure member at core-closure member joints

• Delaminations or voids between layers of a laminate

• Unbonds or voids in an outer skin-to-adhesive interface

• Unbonds or voids at the adhesive-to-core interface

• Water in the core