Chemical Engineering - Chemical Engineering Basics

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:

No answer description available for this question. Let us discuss.

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:

No answer description available for this question. Let us discuss.

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:

No answer description available for this question. Let us discuss.

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:

No answer description available for this question. Let us discuss.

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:

No answer description available for this question. Let us discuss.