Top 1000+ Solved Non Destructive Testing and Evaluation MCQ Questions Answer
Q. The minimum size hole in an ASTM penetrameter is:
a. 0.127 mm (0.005inches)
b. 0.254 mm (0.010 inches)
c. 0.508 mm (0.020inches)
d. 0.762 mm (0.030 inches)
Q. A radiographic sensitivity level of 2-2T means that:
a. The #2 hole in a #2 penetrameter must be visible on the film
b. The 2T hole in a penetrameter which is 2% of the test piece thickness must be visible on the film
c. The 2T hole in a #2 penetrameter must be visible on the film
d. Two penetrameters which are each 2% of the test piece thickness must be used
Q. What is the most desirable temperature for manual developer solutions?
a. 15.5oC(60oF)
b. 20oC (68oF)
c. 22.2oC (72oF)
d. 26.6oC (80oF)
Q. What is the longest period of time which should elapse between complete changes ofdeveloper solution?
a. 1 week
b. 2 weeks
c. 1 month
d. 3 months
Q. A possible result of failing to use a stop bath during manual development is:
a. Streaking of the film
b. Underdevelopment of the film
c. Contamination of the developer solution
d. Developer solution drag-out
Q. Mottled film may result from:
a. Inadequate agitation of the film during development
b. Inadequate water rinse during processing
c. Using exhausted stop bath solution
d. Any of the above
Q. Radiography of tubular sections using a double wall, double viewing technique ismainly applicable to sections:
a. Over 38 mm in diameter
b. 88 mm in diameter or less
c. 125 mm in diameter and less
d. Under 25 mm in diameter
Q. A thin, white line within the film image of a weld crown might be:
a. A hair between the lead screen and the film
b. Incomplete penetration
c. A crack
d. Undercut
Q. Increasing the kV setting on an X ray machine increases the:
a. Penetrating power
b. Short wavelength components of the X ray beam
c. Radiation intensity
d. All of the above
Q. During the manufacturing of a casting, the purpose of a riser is:
a. To introduce molten metal into the mould
b. To provide additional molten metal to allow for shrinkage during solidification
c. To allow excess heat to escape during solidification
d. To provide a vent for excess steam to escape
Q. An effective method of recognising a film artifact is:
a. Viewing a film in daylight
b. Viewing film in reflected light from a viewer
c. Comparing both film shot with a double film technique
d. All of the above
Q. The main reason for using a casting is that:
a. Castings are stronger than other metal product forms
b. Castings are normally of higher quality than other metal product forms
c. Complex shapes of minimum weight are easily manufactured
d. None of the above
Q. A change in which of the following parameters would require a new X ray exposurechart?
a. kV
b. Required film density
c. Test piece thickness
d. All of the above
Q. Static marks on radiographic film are caused by:
a. An improperly grounded X ray tube
b. Scratches on the lead screens
c. Poor film handling technique
d. Old film
Q. Of the following radiographic sources, which emits the most penetrating radiation?
a. Co-60
b. Ra-226
c. Cs-137
d. Ir-192