Heat Transfer Operations Mock Test 4

10%

Question 1 of 10

1. What is the term Ke in the expression for h_BED?
h_BED = \(\frac{4Ke}{r}\)

Gas Thermal Conductivity

Wall Thermal Conductivity

Pellet’s Thermal Conductivity

Effective Thermal Conductivity

Question 1 of 10

Question 2 of 10

2. What is the pressure drop per unit length for the given parameters for a laminar packed bed setup?
Sphericity = 0.6
Superficial velocity = 10m/s
DP = 3mm
Porosity = 0.4
Viscosity = 2.5×10^-5kg/ms

-15.625Pa/m

-1.875Pa/m

-1.875KPa/m

-15.625KPa/m

Question 2 of 10

Question 3 of 10

3. What is the name of the following setup?

Internal Coil

Conventional Jacketed Vessel

Half Coil Jacketed Vessel

Limpet Coil

Question 3 of 10

Question 4 of 10

4. What is the correct name for the following agitator?

Simple turbine impeller

Helical ribbon impeller

Paddle type impeller

Anchor Impeller

Question 4 of 10

Question 5 of 10

5. The substance used in fluidised bed is _______

Powdered Substance

Large balls

Finely divided Solid material

Same as Packed Bed

Question 5 of 10

Question 6 of 10

6. If we have a tube of diameter 30mm and particles of diameter 3mm, the length of the tube is 10cm and the number of pellets is 100. The flow rate is 5cm³/s, then what is the superficial velocity?

0.8cm/s

0.45cm/s

0.5cm/s

0.7cm/s

Question 6 of 10

Question 7 of 10

7. The Ergun equation is used to calculate the ___________

Overall heat transfer coefficients

Reynolds number in packed columns

Pressure drop in packed beds

Number of particles

Question 7 of 10