Chemical Engineering - Chemical Engineering Basics
Exercise :: Chemical Engineering Basics - Section 13
| 1. |
Maraging steels derive their strength from the following mechanism: |
| A. |
A fine, highly dislocated and strong martensite. | | B. |
Fine dispersions of intermetallics of Fe, Ni, Ti etc. | | C. |
Fine dispersions of alloy carbides in a ferrite matrix. | | D. |
Fine dispersions of Fe3 C nucleated on dislocations in austenite. |
Answer: Option A
Explanation:
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| 2. |
Ceramic compounds as compared to metallic compounds |
| A. |
crystallise faster. | | B. |
resist greater tensile stress at room temperature. | | C. |
have higher melting temperature. | | D. |
are better conductor of electricity at higher temperature. |
Answer: Option C
Explanation:
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| 3. |
Pressure exerted by a liquid depends upon its |
| A. |
surface tension | | B. |
density | | C. |
viscosity | | D. |
buoyancy |
Answer: Option B
Explanation:
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| 4. |
The most detrimental impurity in high pressure boiler feed water is |
| A. |
suspended salt | | B. |
dissolved salt | | C. |
silica | | D. |
turbidity |
Answer: Option C
Explanation:
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| 5. |
Pick out the wrong statement. |
| A. |
A soft magnetic material should have high permeability and small area of hysterisis loop. | | B. |
Poisson's ratio of high melting point metals is more than unity. | | C. |
Solders generally melt at less than 185°C. | | D. |
Steel produced by B.O.F process is ideally suited for manufacturing flat product. |
Answer: Option B
Explanation:
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