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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