Liquid Penetrant Test (Leaving Cert Engineering): Flashcards
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Practise the cards
12 cards from this deck
Definition of NDT (Non-destructive testing)
Definition of NDT (Non-destructive testing)
Method to find surface and internal flaws in components without damaging them
Purpose of liquid penetrant test
Purpose of liquid penetrant test
Highlight surface cracks that are difficult to identify with naked eye
Principle behind liquid penetrant test
Principle behind liquid penetrant test
Capillary action draws liquid into surface discontinuities
Step 1 of liquid penetrant test
Step 1 of liquid penetrant test
Cleaning - remove oil, grease, and dirt from surface
Step 2 of liquid penetrant test
Step 2 of liquid penetrant test
Application - spray dye over surface to penetrate cracks
Step 3 of liquid penetrant test
Step 3 of liquid penetrant test
Removal - wipe excess liquid, leaving dye only in cracks
Step 4 of liquid penetrant test
Step 4 of liquid penetrant test
Development - spray developer to draw dye from cracks
Step 5 of liquid penetrant test
Step 5 of liquid penetrant test
Inspection - decide to repair, replace, or leave in service
Number of steps in liquid penetrant test
Number of steps in liquid penetrant test
Five steps
Alternative liquid penetrant method
Alternative liquid penetrant method
UV sensitive liquid penetrant
How UV penetrant is detected
How UV penetrant is detected
Shows brightly under UV lamp in darkened room
Advantage of UV penetrant method
Advantage of UV penetrant method
Better visibility of small defects