Why is it important to view the test piece shortly after developer application and periodically through the development time?

Related MCQs

• Why is the need for a dry surface prior to developer application more of a disadvantage with a dry developer than with a non-aqueous wet developer?
• When using a straight beam technique to examine a thick test piece what change(s) would you expect to see in back wall echo size as you approach the side of the test piece? (Transducer remains completely on test piece)
• It is easier to control developer coating thickness with a soluble developer than a water suspendable one because:
• A soft aluminium test piece is to be penetrant tested. The piece has previously been sand blasted to remove tightly adhering soils. What additional surface preparation should be performed?
• Application of penetrant to a test piece may be by:
• Which of the following developers requires the test piece to be dried prior to its application?
• A cross section view of a test piece is produced by which of the following?
• A A plan view representation of a test piece is produced by which of the following?
• The preferred method of application of aqueous wet developer is:
• Which type of developer does not (!) provide a contrasting background against which to view penetrant indications?