Q.1
##### The Ergun equation is used to calculate the ___________
• a) Pressure drop in packed beds
• b) Reynolds number in packed columns
• c) Overall heat transfer coefficients
• d) Number of particles
Q.2
##### In the Ergun equation, what do you understand by the term X?
• c) Effective diameter
• a) Diameter of the tube
• b) Diameter of the pellets
• d) Equivalent diameter of the tube
Q.3
##### If we have very small dp/di < 0.then we may use ____________
• a) Ergun Equation
• b) Kozeny Carman Equation
• c) Sieder Tate Equation
• d) Arrhenius Equation
Q.4
• a) 2.76×103
• b) 2×105
• c) 0.76×105
• d) 2.76×105
Q.5
• a) 1.751
• b) 1.740
• c) 1.752
• d) 1.749
Q.6
##### What is the pressure drop per unit length for the given parameters for a laminar packed bed setup?
• a) -15.625Pa/m
• b) -15.625KPa/m
• c) -1.875Pa/m
• d) -1.875KPa/m
Q.7
• a) 0.45
• b) 0.95
• c) 0.99
• d) 0.65
Q.8
• a) 0.5cm/s
• b) 0.45cm/s
• c) 0.7cm/s
• d) 0.8cm/s
Q.9
##### In the Formula for porosity, what is the meaning of the term V?
• a) Volume of Void
• b) Volume of Pure Solid
• c) Total Volume
• d) Volume of the tube material
Q.10
##### Which one of the following is the correct expression for Friction Factor in Packed Bed Columns?
• a) f = 150/Re
• b) f = 150/Re+1.75
• c) f = 180/Re+1.5
• d) f = 100/Re+0.0035
Q.11
• a) 7Pa
• b) 724×106Pa
• c) 7×106Pa
• d) 72atm
Q.12
##### A fully packed bed with small particle size has _________ pressure drop than a bed with larger particle size.
• a) More
• b) Less
• c) Same
• d) Negligible
Q.13
##### What is the term Ɵ in the Kozeny Carman equation for laminar flow in packed beds?
• a) Surface Area of pellets
• b) Sphericity of Pellets
• c) Void fraction
• d) Density