Low sulphur diesel fuels are advantageous because
A.they are less corrosive
B.they are less liable to carbonization
C.they form exhaust gases low in sulphurous and sulphuric anhydrides
D.all of the above
Category: Chemical Engineering Mcqs
A piece of metal with a circular hole is heated. If the metal expands on heating the diameter of the hole will
A.Increase
B.Decrease
C.Increase or decrease depending upon the diameter of the whole
D.Increase or decrease depending on the kind of the metal
An ideal fluid is one which
A.is very viscous
B.is frictionless and incompressible
C.has negligible surface tension
D.obeys Newtons law of viscosity
The percentage of U-238 in all naturally occurring uranium is about
A.99.29%
B.0.71%
C.10%
D.99.99%
The percentage of nitrogen in urea is about
A.38.4 wt. %
B.46 wt. %
C.59.1 wt. %
D.61.3 wt. %
What percentage of the original radioactive nuclei are left after 5 half-lives?
A.20
B.12.5
C.3.125
D.5.125
Under the same conditions
A.1 m3 of dry air is lighter than 1 m3 of humid air
B.1 m3 of humid air is lighter than 1 m3 of dry air
C.both 1 m3 of dry air and 1 m3 of humid air have the same weight
A dimensionless heat transfer coefficient which gives a measure of the ratio of the heat transfer rate to the rate at which heat would be conducted within the fluid under a temperature gradient is known as
A.Reynolds number
B.Grashoff number
C.Nusselt number
D.Peclet number
E.Stanton number
The nitrogen compounds in the petroleum products are responsible for
A.loss in catalyst activity
B.colour instability of the products
C.formation of gums
D.all of the above
Pyrex glass is resistant to sudden temperature variations because it has
A.low coefficient of expansion
B.high softening temperature
C.low density and high melting point
D.high coefficient of expansion
