Which of the following is the least pure from of iron?
A.Pig iron
B.Wrought iron
C.Steel
D.Bessemer iron
Category: Chemical Engineering Mcqs
The space-velocity is the proper performance measure of flow reactors. The space-velocity has the units of
A.time
B.(tme)-1
C.velocity
D.(velocity)-1
Which is the unit of Stefan Boltzmann constant
A.W/m2 K4
B.erg/cm2-sec-K4
C.cal/cm2-sec K4
D.kcal/m2-hr-K4
E.All of the above
Tea pots are highly polished
A.So that they may not conduct heat from outside
B.So that they may absorb all radiation from outside
C.To make them attractive to look at
D.Because porcelain takes high polish
E.None of the above
Metaphosphoric acid can be made by heating the orthophosphoric acid to about
A.250?C
B.500?C
C.900?C
D.1500?C
A dimensionless group which represents the rate of the (product of intertial forces times buoyant forces) to viscous force squared is known as
A.Reynolds number
B.Prandtl number
C.Nusselt number
D.Grashof number
E.Mach number
Phosphatic fertilizer is graded based on its
A.P2O5 content
B.P content
C.PCI3 content
D.H3PO4 content
When a vapour condenses into a liquid
A.It absorbs heat
B.It evolves heat
C.Its temperature rises
D.Its temperature drops
E.None of the above
The operating temperature and pressure in urea autoclave are
A.550?C and 1000 atm respectively
B.100?C and 1000 atm respectively
C.185?C and 180 atm respectively
D.25?C and 1 atm respectively
H/C ratio (by weight) is infinite for
A.carbon
B.hydrogen
C.methane
D.gobar gas
