Engineering :: Engineering Materials
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| 251. |
Brinell and Vickers hardness values are practically identical upto a hardness of |
Answer: Option D
Explanation:
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| 252. |
Which of the following hardness tester can be used to determine the hardness of a glass sheet? |
| A. |
Brinell hardness tester |
B. |
Vickers hardness tester |
| C. |
Rockwell hardness tester |
D. |
Shore scleroscope |
| E. |
None of the above |
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Answer: Option D
Explanation:
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| 253. |
Notches in a section produce |
| A. |
Compressive stress |
B. |
Shear stresses |
| C. |
Biaxial tensile stresses |
D. |
Tri-axial tensile stresses |
| E. |
None of the above |
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Answer: Option D
Explanation:
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| 254. |
Creep is expressed in terms of |
| A. |
kg/cm |
B. |
kg/cm2 |
| C. |
cm/cm |
D. |
cm/cm/hr |
| E. |
cm/cm2/hr |
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Answer: Option D
Explanation:
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| 255. |
Fatigue cracks in metals normally start at |
| A. |
Centre of the specimen |
B. |
Core of the specimen |
| C. |
Ends of the specimen |
D. |
Surface of the specimen |
| E. |
Any spot in the specimen |
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Answer: Option D
Explanation:
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| 256. |
Which material has the best damping capacity |
| A. |
High speed steel |
B. |
Stainless steel |
| C. |
Mild steel |
D. |
Cast iron |
| E. |
Diamond |
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Answer: Option D
Explanation:
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| 257. |
To chck the performance of a substance in deep drawing, the test usually conducted is |
| A. |
Tensile test |
B. |
Fatigue test |
| C. |
Izod test |
D. |
Charpy test |
| E. |
Cupping test |
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Answer: Option E
Explanation:
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| 258. |
Which is the heaviest? |
| A. |
Electron |
B. |
Neutron |
| C. |
Positron |
D. |
Atom |
| E. |
Proton |
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Answer: Option D
Explanation:
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| 259. |
The size of coarse grams in metals is |
| A. |
>1 mm |
B. |
> 0.5 mm |
| C. |
> 0.05 mm |
D. |
> 0.005 mm |
| E. |
> 0.0005 mm |
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Answer: Option C
Explanation:
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| 260. |
Number of isotopes for iron is |
Answer: Option D
Explanation:
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