A dimensionless number representing the ratio of inertia forces to viscous forces is known as
A.Reynolds number
B.Prandtl number
C.Nusselt number
D.Mach number
E.Stanton number
Category: Chemical Engineering Mcqs
In the Habers process for the manufacture of ammonia
A.finely divided iron is used as a catalyst
B.finely divided molybdenum is used as a catalyst
C.finely divided nickel is used as a catalyst
D.no catalyst is required
Which one of the following static characteristics of instruments is desirable?
A.Static error
B.Drift
C.Reproducibility
D.Dead zone
Ordinary mercury-in-glass thermometer (without any covering or air gap) is an example of
A.first-order system
B.overdamped second-order system
C.underdamped second-order system
D.multiple first-order systems
Chemically bone ash is mainly
A.calcium phosphate
B.crude phosphorus
C.animal charcoal
D.ammonium phosphate
The average value of thermal conductivity for air at 20?C is about
A.0.11
B.0.011
C.0.022
D.None of the above
A constant-volume gas thermometer employing nitrogen is used to measure temperatures
A.less than 0?C
B.between 0?C and 100?C
C.greater than 100?C
At minimum reflux ratio the operating cost of a distillation column is
A.maximum possible
B.optimum
C.minimum
D.infinite
Which one of the following plots for a gas at about room temperature will suggest an absolute zero temperature if extrapolated suitably?
A.Pressure against 1/volume (temperature constant)
B.Pressure against volume (temperature constant)
C.Volume against temperature (pressure constant)
D.Volume against 1/pressure (temperature constant)
The rate constant of a reaction depends on
A.the temperature of the system
B.the time of reaction
C.the extent of reaction
D.the initial concentration of the reactants
