Exam (elaborations)
NDT TEST 1 QUESTIONS WITH ANSWERS
- Course
- Institution
NDT TEST 1 QUESTIONS WITH ANSWERS...
[Show more]
Content preview
NDT TEST 1 QUESTIONS WITHANSWERS
What are the two advantages of non-destructive testing? The materials
evaluated are not harmed or destroyed, and the majority of the equipment
available is highly portable.
What is liquid penetrating testing? - ANSWER is an NDT method for locating
surface discontinuities in a non-porous object.
What concept allows PT to work? - ANSWER Capillary force or action is the
force that causes liquid to creep and crawl into fine holes.
Are all penetrants? - ANSWER Oil-based, oils are employed because of their
low surface tension.
What was the forerunner of modern penetrant techniques called? - ANSWER
Oil Whiting Method
What is the definition of surface tension? - ANSWER Use the property of the
atoms that link the surface of a liquid, which resembles an elastic skin under
tension.
A discontinuity can be defined as: Change, Break, or Interruption.
Type 1: ANSWER Fluore
scent dye
Type 2 - Answer: Visible dye
Type 3: ANSWER Dual Mode Dye (Fluorescent/visible)
, Phosphorescence - ANSWER shines until the light source is withdrawn, then
disappears.
Blacklight has two significant functions. Removing the short-wave UV photons
and the majority of the white light that the bulb produces.
What is eyeball fluorescence? - ANSWER It is the fluorescing of the liquid of
the eye, which causes transient blurred vision and, of course, a short period
when it would be impossible to continue with the inspection.
What should be the minimum intensity of black light? - ANSWER 1000
microwatt per cm squared
What safety features are integrated into the black light? - ANSWER If the
voltage varies between 90 and 120 volts, the bulb will switch itself off.
If the bulb becomes too hot, it will turn itself off.
Vibration will also turn off the bulb (wait 5 minutes to cool down).
Safe use of a black light? - ANSWER Once the bulbs have warmed up, they
become extremely hot.
If the black light filter shatters, immediately switch off the bulb (unfiltered UV).
If the quartz tube shatters, you could have mercury contamination. The disposal
of bulbs must be regarded as harmful waste.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller luzlinkuz. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
79373 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now