Chemical Engineering - Chemical Engineering Basics
Exercise :: Chemical Engineering Basics - Section 22
| 1. |
Pick out the wrong statement: |
| A. |
Soft water is more corrosive than that carrying calcium salts. | | B. |
The corrosion of brass condenser tubes handling brine solution is also termed as 'dezincification'. | | C. |
Non-annealed brass is highly susceptible to season cracking (i.e., inter-crystal corrosion due to internal stresses). | | D. |
Pure copper is highly susceptible to stress corrosion. |
Answer: Option D
Explanation:
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| 2. |
The tensile strength of plastics ranges from __________ kg/mm2. |
| A. |
10 to 50 | | B. |
50 to 100 | | C. |
0.01 to 0.1 | | D. |
0.1 to 10 |
Answer: Option D
Explanation:
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| 3. |
Ceramic tips for the cutting tool are prepared from __________ powder. |
| A. |
carbon | | B. |
silicon carbide | | C. |
aluminium oxide | | D. |
tungsten |
Answer: Option C
Explanation:
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| 4. |
Grain hardness is measured by the __________ hardness testing method. |
| A. |
Knoop | | B. |
Rockwell F | | C. |
Shore sceleroscope | | D. |
Vicker's |
Answer: Option A
Explanation:
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| 5. |
The thermal efficiency of a heat engine giving an output of 4 KW with an input of 10000 Joules/sec is __________ percent. |
Answer: Option A
Explanation:
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