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February 2019

For the Stoke’s law to be valid in the case of a falling sphere in a fluid, the_____________________?

For the Stoke’s law to be valid in the case of a falling sphere in a fluid, the_____________________?

A. Reynolds number (based on sphere diameter) should be < 1
B. Flow around the sphere should be in turbulent region
C. Sphere must be metallic
D. Fluid density should be constant

For the Stoke’s law to be valid in the case of a falling sphere in a fluid, the_____________________? Read More »

Chemical Engineering Basics

Out of the following, the lowest packing of atoms exists in ____________________ crystal lattice structure?

Out of the following, the lowest packing of atoms exists in ____________________ crystal lattice structure?

A. Hexagonal close, packed (hcp)
B. Face centred cubic (fcc)
C. Body centred cubic (bcc)
D. Simple cubic

Out of the following, the lowest packing of atoms exists in ____________________ crystal lattice structure? Read More »

Chemical Engineering Basics

In case of brasses, with decreasing zinc percentage and increasing copper percentage, its _____________ increases ?

In case of brasses, with decreasing zinc percentage and increasing copper percentage, its _____________ increases ?

A. Percentage elongation
B. Brinell hardness
C. Tensile strength
D. All A, B & C

In case of brasses, with decreasing zinc percentage and increasing copper percentage, its _____________ increases ? Read More »

Chemical Engineering Basics

_____________ is the process of coating the surface of steel with aluminium oxide, thereby imparting it increased resistance to corrosion & oxidation upto a temperature of 700°C ?

_____________ is the process of coating the surface of steel with aluminium oxide, thereby imparting it increased resistance to corrosion & oxidation upto a temperature of 700°C ?

A. Veneering
B. Galvanising
C. Electroplating
D. Calorising

_____________ is the process of coating the surface of steel with aluminium oxide, thereby imparting it increased resistance to corrosion & oxidation upto a temperature of 700°C ? Read More »

Chemical Engineering Basics