Chemical Engineering - Chemical Engineering Basics
Exercise :: Chemical Engineering Basics - Section 18
| 36. |
Hardness & tensile strength of austenitic stainless steel can be increased by |
| A. |
martempering | | B. |
cold working | | C. |
normalising | | D. |
hardening |
Answer: Option B
Explanation:
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| 37. |
Which of the following metals occurs in nature in their free metallic state ? |
| A. |
Au & Ag | | B. |
Pb & Zn | | C. |
Cu & Ni | | D. |
none of these |
Answer: Option D
Explanation:
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| 38. |
The most suitable material for a sewer for carrying storm water is |
| A. |
asbestos cement | | B. |
cast iron | | C. |
mild steel | | D. |
cement concrete |
Answer: Option D
Explanation:
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| 39. |
In a totally irreversible isothermal expansion process for an ideal gas, ΔE = 0, ΔH = 0. Then ΔQ and ΔS will be |
| A. |
ΔQ = 0, ΔS=0 | | B. |
ΔQ = 0 , ΔS = +ve | | C. |
ΔQ = 0, ΔS = -ve | | D. |
ΔQ = +ve , ΔS= +ve |
Answer: Option B
Explanation:
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| 40. |
Sulphur is melted in the sulphuric acid plant most commonly by employing |
| A. |
electrical heater | | B. |
steam heater | | C. |
direct fuel oil fired heater | | D. |
gas fired furnace |
Answer: Option B
Explanation:
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