cap 14 Materiales

Question 1

1. A reliable NDT inspection process is one that is not only repeatable and reproducible but also has a known:

a. limit of application.
b. limit of sensitivity.
c. human factor.
d. application base.

Answer 1

b. limit of sensitivity.

Question 2

2. NDT applications that cannot tolerate a significant risk of component failure require:

a. costly inspection processes.
b. a large number of inspection processes.
c. a highly reliable inspection process.
d. redundant inspection processes.

Answer 2

c. a highly reliable inspection process.

Question 3

3. Aspects that enhance NDT reliability include all but which of the following?

a. Proper calibration of equipment and systems.
b. The latest versions of each type of equipment.
c. Adequate procedures for each process.
d. Process controls, including audits and assessments.

Answer 3

b. The latest versions of each type of equipment.

Question 4

4. In spite of good process controls, there is a chance that the test may not actually be performed or may not be performed according to an established procedure with a certain probability of inspection. This is usually attributed to:

a. poor procedures and audits.
b. outdated or improper equipment.
c. calibration issues.
d. human factors.

Answer 4

d. human factors.

Question 5

5. There are four possible outcomes from a nondestructive test: (1) a relevant discontinuity is found; (2) a discontinuity-free region or sample is accepted; (3) a discontinuity is called where none exists; or (4) a relevant discontinuity is overlooked. Reliable inspections strive to attain outcomes:

a. 1 and 3.
b. 3 and 4.
c. 1 and 2.
d. 2 and 4.

Answer 5

c. 1 and 2.

Question 6

6. Probability of detection is a well-established technique for demonstrating detection capability for the inspector and procedure at that instant in time and could be considered an estimate of the:

a. statistical knowledge level of the NDT engineer.
b. largest discontinuity that could be missed during repeated inspections.
c. likelihood that the next test indication noted is a false call.
d. effectiveness of the procedure regardless of
the inspector.

Answer 6

b. largest discontinuity that could be missed during repeated inspections.

Question 7

7. lf possible, nondestructive testing requirements should be considered at what point in the production process?

a. During design and development.
b. During modeling and prototype.
c. During construction.
d. After product failure.

Answer 7

a. During design and development.