R09 Set No. 2

Code No: A109212303 R09 Set No.
2
II B.Tech I Semester Examinations,December 2011
PROCESS ENGINEERING PRINCIPLES
Bio-Technology
Time: 3 hours Max Marks: 75
Answer any FIVE Questions
All Questions carry equal marks
?????
1. (a) Plot a graph to explain the characteristics of centrifugal pump?

(b) Briefly explain the situation under which peristatic pumps are used. [7+8]
2. Explain the rheology of non-Newtonian fluids? Write some examples. [15]
3. A sharp edged venture meter having a diameter of 0.0566 m is installed in a 0.1541

m pipe through which oil having a density of 990 kg/m3 and a viscisity of 3.1 cp
is flowing. The measured pressure difference across the venturi is 112.2 KN/M2.
Calculate the volumetric flow rate in m3 /s. assume Cv =0.95. [15]
4. From the first principles derive Ergun’s equation for the determination of pressure
drop in a packed tower and briefly discuss the application. [15]
5. Discuss about the Vander waals equations of state. [15]
6. A liquid of density 1.15 gm/cm3 is flowing from point A to B which is 5 meter

above point A. the frictional losses in a pipe line of 4.0 cm i.d. is 0.1 kg fm / kg,
for a volumetric flow rate of 500 cm3 / sec. If point ‘A’ and ‘B’ are atmospheric
pressure and velocity at point ‘A’ is zero, calculate the pump work required. [15]
7. A standard 1 inch-sch-40 horizontal steel pipe is used to conduct chlorine gas.

The gas enters the pipe through a rounded entrance at a pressure of 6 atm abs, a
temperature of 1200C and a velocity of 35m/s.
(a) What is the maximum possible length of the pipe?

(b) What are the pressure and stagnation temperature of the gas at the end of
the pipe at maximum length? For Cl2 γ = 1.36 and M= 70.19. [15]
8. Explain about the driving forces and resistanes involved in
(a) Momentum transfer

(b) Mass transfer
(c) Heat transfer. [15]
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1
Code No: A109212303 R09 Set No. 4
Bio-Technology
?????
1. Discuss the dimensional numbers that you encounter in the mass, heat transfer and
in the fluid mechanics and give their significance. [15]
2. Write short note on
(a) Form drag
(b) Stagnation point
(c) Drag coefficients. [5+5+5]
3. What is priming? Expalin how the pump efficiency can be decresed with priming
with proper equations? [15]
4. Discuss the vander waals equations of state function and discuss its applications.
[15]
5. (a) Define Fanning’s friction factor. How is it related to the pressure drop?
(b) Explain the methods of reducing skin friction.
(c) Employing dimensional analysis, show that the friction factor is a function of
Reynold’s number. [4+5+6]
6. Derive the mathematical expression for Bernoulli Equation and give its application.
[15]
7. (a) Give examples for
(b) Bingham Plastics
(c) Pseudo Plastics
(d) Dilatent fluid
(e) Rheopeetic fluid [3+3+5+4]
8. (a) Explain the principle and working of the following:
i. Simple manometer
ii. Inclined manometer
(b) A U-tube manometer indicates a pressure drop of 25cm water across an air
filter. The air at 260C and a guage pressure of 4 105 N/m2 . What is the
pressure drop (N/m2 ) and what is the percentage of error is introduced if the
density of the air in the manometer leads is neglected. [3+4+8]
?????
2
Code No: A109212303 R09 Set No. 1
Bio-Technology
?????
1. Discuss in detail the determination of pressure drop for flow through bed of solids.
[15]
2. Explain a core-and-plate viscometer for determining the rheological data of a fer-

mentation broth. [15]
3. Define what is a fluid and discuss the hydrostatic equilibrium for compressible and
incompressible fluids. [15]
4. What do you mean by unit operations and unit processes discuss in detail with
examples? [15]
5. (a) Explain with neat sketch the working of a centrifugal pump. What are the
merits and demerits of such a pump?
(b) What is cavitation and how it can be eliminated for a centrifugal pump? [7+8]
6. (a) Write Hagen-Poiseuille equation and explain the terms mentioned in it.
(b) Derive a relation between average velocity and maximum velocity for laminar
flow through pipes. [4+11]
7. The temperature of the earth’s atmosphere drops about 50C for every 1000m of
elevation above the earth’s surface. If the air temperature at ground level is 150C
and the pressure is 760m Hg. At what elevation is the pressure 380mm Hg? Assume
that the air behaves as an ideal gas. [15]
8. Gas is leaving a fermenter at close to 1 atm pressure and 250 C has the following
composition: 78.2 % nitrogen, 19.2 % oxygen, 2.6 % carbon dioxide. Calculate
(a) the mass composition of the fermenter off gas

(b) the mass of CO2 in each cubic meter of gas leaving the fermenter. [15]
?????
3
Code No: A109212303 R09 Set No. 3
Bio-Technology
?????
1. Explain the construction and working of an extrusion rheometer. [15]
2. Give a brief explanation on flow measuring systems. [15]
3. An orifice meter is used to measure the flow rate in pipes the flow rate is related
to pressure
p drop by an equation of the form
U = c ∆p/ρ where
U= fluid velocity, ∆p= pressure drop, ρ = density of the flowing fluid, c= constant
of proportionality, What are the units of “C”? [15]
4. A 15 KW pump with 80 % efficiency is discharging oil of specific gravity 0.85 to a

overhead tank from a storage tank. The surface of the oil in the storage tank from
datum line is 5 m and that in the overhead tank from the datum line is 25 m. both
the tanks are open to atmosphere. If the losses in the piping system are 1.75 m of
flowing fluid, calculate the volumetric flow rate of oil. [15]
5. What is minimum fluidization velocity? Derive an expression for calculating mini-

mum fluidization velocity. [15]
6. (a) Derive Hagen-Poiseuille equation. Explain the significance of the equation.

(b) Derive relations for Reynolds number and friction factor. [10+5]
7. Discuss the applications of transport phenomena principles in bioprocessing give

some examples. [15]
8. (a) A double acting reciprocating pump has a cylinder of 15 cm in diameter and

an average stroke of 20 cm. The piston rod is 2.25 cm in diameter. The pump
runs at a rate of 60 strokes per minute and discharges into a calibration tank
of 1.2 m diameter. The pump discharges such that the water level in the tank
rose by 1.30 m in a period of 2 minutes. Calculate the water-end efficiency of
the pump.
(b) What factors influence the choice of a pump for a particular operation? [7+8]
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Code No: A109212303 R09 Set No.

1. (a) Plot a graph to explain the characteristics of centrifugal pump?

2. Explain the rheology of non-Newtonian fluids? Write some examples. [15]

3. A sharp edged venture meter having a diameter of 0.0566 m is installed in a 0.1541

5. Discuss about the Vander waals equations of state. [15]

6. A liquid of density 1.15 gm/cm3 is flowing from point A to B which is 5 meter

7. A standard 1 inch-sch-40 horizontal steel pipe is used to conduct chlorine gas.

(a) What is the maximum possible length of the pipe?

8. Explain about the driving forces and resistanes involved in

(a) Momentum transfer

2. Explain a core-and-plate viscometer for determining the rheological data of a fer-

(a) the mass composition of the fermenter off gas

1. Explain the construction and working of an extrusion rheometer. [15]

2. Give a brief explanation on flow measuring systems. [15]

4. A 15 KW pump with 80 % efficiency is discharging oil of specific gravity 0.85 to a

5. What is minimum fluidization velocity? Derive an expression for calculating mini-

6. (a) Derive Hagen-Poiseuille equation. Explain the significance of the equation.

7. Discuss the applications of transport phenomena principles in bioprocessing give

8. (a) A double acting reciprocating pump has a cylinder of 15 cm in diameter and

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