Metallurgical Testing and Inspection MCQ Questions and Answers

71

Which of the following statements is/are true for ultrasonic test?

A) Waves generated are health hazardous B) Complicated shapes can be easily scanned C) Equipment used for ultrasonic testing is portable D) All of these

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Answer & Solution

Answer: Option C

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72

Radiographic appearance of inclusions resembles

A) dark patches as compared to the background B) bright patches as compared to the background C) dark or bright patches depending on radiation energy D) dark or bright patches depending on relative dertsity

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Answer & Solution

Answer: Option A

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73

The tensile test of a sheet material exhibits 20% elongation in length and 10% decrease in width. The plastic strain ratio is

A) 2.37 B) 1.37 C) 1.17 D) 0.87

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Answer & Solution

Answer: Option B

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74

The best method for determining the average hardness of an aluminium casting is

A) Rockwell A B) Rockwell C C) Knoop D) Brinnel E) Vickers

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Answer & Solution

Answer: Option B

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75

Ultrasonic testing can be used for (choose the correct combination of the following statements P, Q, R, S):
P. Quantitative analysis of phases
Q. Determination of elastic constants
R. Determination of endurance limit
S. Detection of internal defects

A) P, R B) P, Q C) Q, S D) R, S

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Answer & Solution

Answer: Option D

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76

In fracture control design procedures, NDT plays an important role because it primarily enables to

A) predict the time it will take for a given defect to grow to a critical size B) evaluate accurately the defect type, location and size that exist in the material C) measure the mechanical properties of the design materials D) measure the grain sizes of the microstructures in the materials

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Answer & Solution

Answer: Option B

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77

Match the following:

Group 1	Group 2
P. Ultrasonic	1. change in accoustic impedence
Q. Radiography	2. change in thermal conductivity
R. Eddy current	3. change in electrical conductivity
S. Magnetic particle	4. change in density
	5. change in magnetic flux leakage

A) P-1, Q-3, R-2, S-5 B) P-2, Q-3, R-4, S-1 C) P-1, Q-4, R-3, S-5 D) P-5, Q-1, R-4, S-3

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Answer & Solution

Answer: Option C

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78

Match the NDT methods with the type of defects detected.

NDT methods	Type of defects detected
P. Ultrasonic	1. Internal
Q. X-ray	2. Most
R. Eddy current	3. External
S. Liquid penetrant	4. Surface breaking

A) P-1, Q-2, R-3, S-4 B) P-3, Q-1, R-2, S-4 C) P-2, Q-1, R-3, S-4 D) P-2, Q-4, R-1, S-3

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Answer & Solution

Answer: Option A

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79

Radiography technique of detecting defects is based on the principle of

A) Diffraction B) Reflection C) Interference D) Absorption

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Answer & Solution

Answer: Option D

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80

What is the most common source of penetrant bath contamination

A) Emulsifier B) Water C) Developer D) Solvent

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Answer & Solution

Answer: Option B

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Metallurgical Testing and Inspection MCQ Questions and Answers | Metallurgical Engineering