Chemical Engineering MCQs

6108 MCQs  (Page 56 of 611)

The normal stress is the same in all directions at a point in a fluid, only when the fluid__________________?
A. Is at rest & has zero viscosity
B. Is frictionless
C. Fluid layer has no motion relative to an adjacent layer of fluid
D. Is incompressible & frictionless
Desalination of water__________________?
A. Makes it potable
B. Makes it non-potable
C. Means distillation of water
D. None of these
_____________________ of austenite decreases the hardenability in steel ?
A. Fine grains
B. Coarse grains
C. Homogeneity
D. Dissolved elements (except cobalt)
Shrinkage allowance on pattern is provided to compensate for shrinkage when the _____________________?
A. Metal changes from liquid state to solid state at freezing temperature
B. Solid phase temperature drops from freezing temperature to the room temperature
C. Liquid metal temperature drops from pouring temperature to room temperature
D. Liquid metal temperature drops from pouring temperature to freezing temperature
Use of water as a manometric liquid suffers from the disadvantage of its____________________?
A. Low vapour pressure
B. Corrosive nature
C. High vapour pressure
D. High boiling point