2010 PT 복기

* It is important to control the concentration of wet developers to assure that ;

① Only relevant discontinuities are defected.

② All discontinuities are defected.

③ The inspection surface has the proper amount of developer.

④ All penetrant is with drawn from all discontinuities.

* The property of penetrant test materials that result from molecular friction or

internal friction iss ;

① emulsifiablity    ② volatility   ③ viscosity    ④ solubility

* what is the primary purpose of running a known defect standard through the          penetrant process on a daily basis ?

① To check sepuration of constituents.

② To check for changes in the penetrant system.

③ To verify penetrant sensitivity.

④ To verify penetrant brightness.

* A liquid penetrant indication that would be classified as "true or relevant" is usually the result of ;

① poor washing during the removal sequence.

② parmeter violations

③ imperfeet fit-up

④ metallurgicul failure of the part.

* The depth of penetrant penetraration into discontinuity is secondarily by which of    the following ?

① in clusion type      ② Air trapped into discontinuity

③ Penetrant viscosity  ④ Penetrant  surface tension

* Dry developers are not used with which of the following ?

① Water-washable      ② Lipophllic post-emulsifiabl

③ Solvent-removable   ④ Hydrophillic post-emulsifiabl

* Dry developers are generally not used with visible dye penetrants because ;

① they are spesifically formulated for fluorescent materials

② they can not be used in field applications

③ they do not provide a cantrasling background

④ surfaces must be smooth for effective use

* Disadvantage of water washable fluorescent penetrant is ;

① not good on rough surfaces

② is easily washed with water

③ is requires a dark area with a black light unit

④ is not good for small parts

* Washability break ?

* mean check removablility water washable ?