When viewed under black light, developer appears:

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?
• For adequate test results, the black light used in fluorescent penetrant examination should provide what minimum black light intensity at the test surface?
• It is easier to control developer coating thickness with a soluble developer than a water suspendable one because:
• Dual purpose penetrants are viewed under what type of light?
• While performing a fluorescent water washable penetrant test, which of the following steps should be performed under black light?
• What minimum warm-up time is required for acceptable performance of a mercury Vapour arc black light?
• If a mercury vapour arc black light is inadvertently turned off, how soon may it be restarted?
• What is the likely result of looking directly into a black light?
• The output of a mercury vapour black light depends on:
• When a mercury vapour black light is first turned on, what minimum warm-up time is normally required?