MATERIALS AND PROCESSES FOR NDT-
QUESTIONS 1/19
1. Relation of NDT to Manufacturing*Answer√√
2. Fracture is a type of material failure . Of the following which is another type
of material failure /*Answer√√ Permanent deformation.
3. Which of the following statements best differentiates between a defect and
a discontinuity ?*Answer√√ Discontinuities can propagate and become defects
4. Nondestructive Testing is often differentiated from other measurements or
inspection techniques in that*Answer√√ NDT involves direct tests related to some other quality or
characteristic of the material.
5. Which of the following is not a function of NDT ?*Answer√√ determine the remaining life
of a structure
6. An important basis for the success of fracture control design procedures is
*Answer√√ the need to ensure that unexpected flaws of some critical size are not present when the component
enters service.
7. If properly used, NDT can assist in fracture control by*Answer√√ providing an accurate
,evaluation of the number and type of discontinuities that exist in a material.
8. A statement that a particular experiment produced a 0.9 probability of
detection with a 95% confidence level means that
*Answer√√ there is a 5% probability that the probability of detection is overstated.
9. Introduction to Manufacturing Technology
*Answer√√
10. Most solid metals and plastics that have reasonable strength at room
temperature are called
*Answer√√ engineering materials.
11. Material properties , as used in design are most frequently determined
by
*Answer√√ materials testing
12. Even at the early stages of product planning, NDT should be considered
because
*Answer√√ the design of the part should permit easy access to critical areas for late inspection.
,13. Properties of Materials
*Answer√√
14. Which of the following material properties are the most concern if corrosion
resistance is essential ?
*Answer√√ a. Processing Properties
B Mechanical properties
c. Physical properties
d. Chemical properties
, 15. Which of the following is true relative to the comparison of the properties
of aluminum -based alloys and iron based alloys ?*Answer√√ Iron is preferred in load
carrying designs
, but it shoud not be used for any deformation type of manufacturing process.
16. Tensile tests are conducted on specimens from a newly developed ally in
order to determine the ultimate tensile strength of the material. Such tests
are referred to as*Answer√√ destructive tests,
17. A bar that is 305 mm (12") long, 51 mm (2 in.) wide and 25 mm (1") thick is
subjected to a tensile load acting along the length of the bar of 329 kg (36,000
lbs.). What is the tensile stress within the bar ? .*Answer√√ 124 020 kPa (18000 psi)
18. The modulus of elasticity, or Young's modulus, is related to the material's
relative
*Answer√√ stittness and yield strength
19. Which of the following materials is typically considered when the applica-
tion only requires high compressive strength ?*Answer√√ Cast iron
QUESTIONS 1/19
1. Relation of NDT to Manufacturing*Answer√√
2. Fracture is a type of material failure . Of the following which is another type
of material failure /*Answer√√ Permanent deformation.
3. Which of the following statements best differentiates between a defect and
a discontinuity ?*Answer√√ Discontinuities can propagate and become defects
4. Nondestructive Testing is often differentiated from other measurements or
inspection techniques in that*Answer√√ NDT involves direct tests related to some other quality or
characteristic of the material.
5. Which of the following is not a function of NDT ?*Answer√√ determine the remaining life
of a structure
6. An important basis for the success of fracture control design procedures is
*Answer√√ the need to ensure that unexpected flaws of some critical size are not present when the component
enters service.
7. If properly used, NDT can assist in fracture control by*Answer√√ providing an accurate
,evaluation of the number and type of discontinuities that exist in a material.
8. A statement that a particular experiment produced a 0.9 probability of
detection with a 95% confidence level means that
*Answer√√ there is a 5% probability that the probability of detection is overstated.
9. Introduction to Manufacturing Technology
*Answer√√
10. Most solid metals and plastics that have reasonable strength at room
temperature are called
*Answer√√ engineering materials.
11. Material properties , as used in design are most frequently determined
by
*Answer√√ materials testing
12. Even at the early stages of product planning, NDT should be considered
because
*Answer√√ the design of the part should permit easy access to critical areas for late inspection.
,13. Properties of Materials
*Answer√√
14. Which of the following material properties are the most concern if corrosion
resistance is essential ?
*Answer√√ a. Processing Properties
B Mechanical properties
c. Physical properties
d. Chemical properties
, 15. Which of the following is true relative to the comparison of the properties
of aluminum -based alloys and iron based alloys ?*Answer√√ Iron is preferred in load
carrying designs
, but it shoud not be used for any deformation type of manufacturing process.
16. Tensile tests are conducted on specimens from a newly developed ally in
order to determine the ultimate tensile strength of the material. Such tests
are referred to as*Answer√√ destructive tests,
17. A bar that is 305 mm (12") long, 51 mm (2 in.) wide and 25 mm (1") thick is
subjected to a tensile load acting along the length of the bar of 329 kg (36,000
lbs.). What is the tensile stress within the bar ? .*Answer√√ 124 020 kPa (18000 psi)
18. The modulus of elasticity, or Young's modulus, is related to the material's
relative
*Answer√√ stittness and yield strength
19. Which of the following materials is typically considered when the applica-
tion only requires high compressive strength ?*Answer√√ Cast iron
