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Chemical Engineering Basics

Heating the Hypo-eutectoid steels to 30°C above the upper critical temperature line, soaking at that temperature and then cooling slowly to the room temperature to form a pearlite & ferrite structure is called_______________________?

Chemical Engineering Basics /
Heating the Hypo-eutectoid steels to 30°C above the upper critical temperature line, soaking at that temperature and then cooling slowly to the room temperature to form a pearlite & ferrite structure is called_______________________?

A. Tempering
B. Hardening
C. Annealing
D. Normalising

Heating the Hypo-eutectoid steels to 30°C above the upper critical temperature line, soaking at that temperature and then cooling slowly to the room temperature to form a pearlite & ferrite structure is called_______________________? Read More »

Chemical Engineering Basics

The difference in one unit of Rockwell hardness number corresponds to a difference in the depth of indentation of ______________ mm ?

Chemical Engineering Basics /
The difference in one unit of Rockwell hardness number corresponds to a difference in the depth of indentation of ______________ mm ?

A. 0.001
B. 0.01
C. 0.002
D. 0.02

The difference in one unit of Rockwell hardness number corresponds to a difference in the depth of indentation of ______________ mm ? Read More »

Chemical Engineering Basics

Nusselt number is related to Grashoff number (Gr) in turbulent & laminar flow respectively, in respect of free convection over a vertical flat plate as_________________?

Chemical Engineering Basics /
Nusselt number is related to Grashoff number (Gr) in turbulent & laminar flow respectively, in respect of free convection over a vertical flat plate as_________________?

A. Gr0.25, Gr
B. Gr0.25, Gr0.33
C. Gr, Gr0.25
D. Gr0.33, Gr0.25

Nusselt number is related to Grashoff number (Gr) in turbulent & laminar flow respectively, in respect of free convection over a vertical flat plate as_________________? Read More »

Chemical Engineering Basics

Theoretical volume of oxygen required for complete combustion of 1Nm3 of acetylene, in oxy-acetylene welding is ______________ Nm3 ?

Chemical Engineering Basics /
Theoretical volume of oxygen required for complete combustion of 1Nm3 of acetylene, in oxy-acetylene welding is ______________ Nm3 ?

A. 0.5
B. 1
C. 1/3
D. 2.5

Theoretical volume of oxygen required for complete combustion of 1Nm3 of acetylene, in oxy-acetylene welding is ______________ Nm3 ? Read More »

Chemical Engineering Basics