Which type of developer does not (!) provide a contrasting background against which to view penetrant indications?

Related MCQs

• Fluorescent penetrant indications are more visible than colour contrast penetrant indications because:
• 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 post emulsifiable penetrant process, it is important to drain as much excess penetrant as possible from the surface of a test piece which has been immersed in the penetrant because:
• Which type of developer should not be used with a visible dye penetrant process?
• A group of indications, some sharp and some broad and fuzzy, were found on an area of a small forging. Demagnetization and re-inspection eliminated these indications. What was the probable cause?
• Dark rounded indications with rather smooth edges appear on the radiograph of casting made in sand mould. These indications would be interpreted as:
• Surface breaking porosity will show what type of relevant indications when a welded aluminium plate is tested with the liquid penetrant method:
• It is easier to control developer coating thickness with a soluble developer than a water suspendable one because:
• A developer aids penetrant bleed out because of:
• A penetrant process which employs an emulsifier as a separate step in the penetrant removal process is called: