Engineering :: Engineering Materials
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| 231. |
The materials which has the same elastic properties in all directions is called |
| A. |
Brittle material |
B. |
Homogeneous material |
| C. |
Hard material |
D. |
Isotropic material |
| E. |
Isentropic material |
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Answer: Option D
Explanation:
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| 232. |
Accounstical materials |
| A. |
Absorb sound |
B. |
Reflect sound |
| C. |
Create sound |
Answer: Option A
Explanation:
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| 233. |
Porous materials generally |
| A. |
Absorb most of the sound |
B. |
Reflect entire sound |
| C. |
Transmit sound |
Answer: Option A
Explanation:
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| 234. |
A concrete wall generally |
| A. |
Reflects sound |
B. |
Absorbs sound |
| C. |
Transmits sound |
D. |
Creates sound |
Answer: Option A
Explanation:
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| 235. |
Brinell hardness number for soft brass is usually in the range |
| A. |
10--50 |
B. |
50-70 |
| C. |
80-150 |
D. |
150-300 |
| E. |
300-450 |
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Answer: Option B
Explanation:
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| 236. |
Brinell hardness number of mild steel should expected to be in the range be |
| A. |
20--50 |
B. |
10-110 |
| C. |
110-150 |
D. |
150-300 |
| E. |
300-450 |
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Answer: Option C
Explanation:
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| 237. |
Steel balls for ball bearings are hardened to |
| A. |
100 VPN |
B. |
150-200 VPN |
| C. |
200-400 VPN |
D. |
400-700 VPN |
| E. |
700-800 VPN |
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Answer: Option E
Explanation:
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| 238. |
The theory of failure which gives fairly good results for the ductile materials is |
| A. |
Hooke's law |
B. |
Maximum shear stress theory |
| C. |
Maximum principal stress theory |
D. |
Maximum strain energy theory |
| E. |
Maximum shear strain energy theory |
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Answer: Option E
Explanation:
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| 239. |
The theory of failure generally applied in case of brittle materials is |
| A. |
Maximum shear stress theory |
B. |
Maximum principal stress theory |
| C. |
Maximum strain energy theory |
D. |
Maximum shear strain energy theory |
| E. |
Theory of superposition |
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Answer: Option B
Explanation:
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| 240. |
The number of elastic constants for a completely anisotropie elastic material which follows Hooke's law is |
Answer: Option D
Explanation:
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