The chemical formula of sodium tripolyphosphate (STPP) is
A.Na5P3O10
B.Na3P5O10
C.Na3P3O10
D.Na5P2O5
Category: Chemical Engineering Mcqs
The enthalpy of an ideal gas
A.depends on its temperature only
B.depends on its pressure only
C.may decrease while the internal energy increases
D.depends on its volume only
Which of the following hydrocarbons are the most desirable in gasoline?
A.Paraffins
B.Isoparaffins
C.Naphthenes
D.Aromatics
Which of the following hydrocarbons are the most desirable in high speed diesel oil?
A.Aromatics
B.Naphthenes
C.Paraffins
D.Naphthenic acids
A gas can be liquefied by pressure alone only when its temperature is
A.higher than its critical temperature
B.equal to or higher than its critical temperature
C.less than or equal to its critical temperature
D.less than its critical temperature
The operation of a cyclone separator relies on
A.centrifugal force acting on the particle
B.producing an electric charge on the particle to be collected and then directing it by electrostatic forces to the collecting electrodes
C.the creation of intimate contact between a stream of gas and a flow of scrubbing liquor
D.diffusion of dust particles
Entrainment separator is used in evaporators to
A.Increase the boiling point
B.Reduce the boiling point
C.Prevent foaming
D.Separate liquid droplets from vapour
E.Discharge mud and other impurities
The property of a fluid by virtue of which it offers resistance to shear is known as
A.density
B.surface tension
C.viscosity
D.vapor pressure
Essential requirement for the transfer of heat from one body to another is
A.Both bodies must be solids
B.Both bodies must be in contact
C.Temperatures of the two bodies must be different
D.One of the bodies must have internal source of heat generation
E.All of the above
Brass is composed of
A.Cu?Zn
B.Cu?Sn
C.Sn?Zn
D.AI?B
