When a casting is being non destructively examined for critical service, and the possibility of cracks exists, which of the following techniques would be best?

Radiography (X or gamma ray, depending on the thickness)

X ray radiography at 200 kV or less

Magnetic Particle or Liquid Penetrant testing

Radiography and either Magnetic Particle or liquid Penetrant testing

When a casting is being non destructively examined for critical servic

1.	When a casting is being non destructively examined for critical service, and the possibility of cracks exists, which of the following techniques would be best?
A.	X ray radiography at 200 kV or less
B.	Magnetic Particle or Liquid Penetrant testing
C.	Radiography (X or gamma ray, depending on the thickness)
D.	Radiography and either Magnetic Particle or liquid Penetrant testing
Answer» C. Radiography (X or gamma ray, depending on the thickness)