In martensitic stainless steel the difference between the chromium percentage and seventeen times the carbon content is
A.less than 12.5%
B.greater than 12.5 %
C.greater than 24%
D.less than 18%
Category: Chemical Engineering Mcqs
Pitchblende is an ore of
A.radium
B.thorium
C.polonium
D.uranium
High absolute humidity
A.increases the explosibility of the aerosol
B.decreases the explosibility of the aerosol
C.does not change the explosibility of the aerosol
For the standard atmosphere upto the stratosphere temperature of air decreases uniformly at the rate of
A.0.65?C/m
B.0.065?C/m
C.0.0065?C/m
D.0.00065?C/m
Raw materials for the manufacture of orthophosphoric acid by wet process are phosphate rock and
A.coke
B.98% H2SO4
C.sand
D.60% HNO3
Amount of moisture in air is determined by
A.refractometer
B.polarimeter
C.hygrometer
D.polarograph
Which metal is most important in atomic research?
A.Cd
B.U
C.Pb
D.Fe
Nitrogen gas is used
A.as protective atmosphere to prevent oxidation in metal working and food preservation
B.for welding
C.for cutting of metals
D.as refrigerant
Sulfolane is
A.Ethyl mercaptan
B.thiophene
C.tetrahydrothiophene dioxide
D.methyl mercaptan
