The life of a meson is about
A.10-18 sec
B.10-2 sec
C.10-18 sec
D.1 sec
Category: Chemical Engineering Mcqs
Most distillation columns are designed for reflux ratios between where Rmin = minimum reflux ratio
A.3 to 5 times Rmin
B.1.2 to 1.7 times Rmin
C.2 to 10 times Rmin
D.0.2 to 0.7 times Rmin
Penetration index and softening point are the important tests for
A.high speed diesel oil
B.Light diesel oil
C.Kerosine
D.bitumen
To convert for the stoke to ft2/s one multiplies by
A.1-Jan
B.(30.48)2
C.(30.48)-2
D.144
Which of the following types of tracer input signal can be used to study the extent of non-ideal flow?
A.Periodical signal
B.Step signal
C.Pluse signal
D.All of the above
The dimensions of specific heat are
A.LT?2
B.LT-1?-1
C.LT-2?
D.LT-2?-1
Arrange the following hydrocarbons series in the increasing order of cetane number for the same number of carbon atoms 1. Paraffins 2. Naphthenes 3. Aromatics
A.Paraffins Naphthenes Aromatics
B.Aromatics Naphthenes Paraffins
C.Paraffins Aromatics Naphthenes
D.Aromatics Paraffins Naphthenes
At the critical point of a substance
A.there is no distinction between liquid and vapour phases
B.the densities of the liquid and vapour become equal
C.the surface tension vanishes
D.all of these asnwers
Fuels produce energy because
A.their oxidation reactions are endothermic
B.they produce large volumes of gases
C.their oxidation processes are exothermic
D.none of the above
Which insulating material is suitable for low temperature applications?
A.Cork
B.Asbestos paper
C.Diatomaceous earth
D.85% magnesia
E.Fused alumina bricks
