Model Question Paper

BSBT3-BSCH3- TRANSPORT PROCESSES

Time : 3 hrs Maximum marks : 75

 

Instruction:

1. Question paper is divided into Group A, Group B and Group C

2. Each Group is 25 Marks

3. Figure to the right in bracket indicates marks.

4. Good Handwriting is expected

5. Assume suitable data if necessary.

 

(5)

Group A (25 Marks)

Q.1 What is the application of unit operations?

	(10)

 

Q.2 a) What is ideal gas law?

b)      State the law of conservation of mass.

c)      What is Ficks Law?

d)      What is the value of Reynolds Number?

e)     

(10)

Write down overall mass balance equation.

 

Q.3a ) what are the uses of pitot tube?

b)      What is the value of the Gas Law Coefficient?

c)      What is the meaning of recycle?

d)      What is the meaning of poundal?

e)      Derive the head of a fluid.

(10)

Q.4With the help of a neat sketch explain the working of a simple
centrifugal pump along with necessry deductions.

 

	(10)

 

Q.5 Deduce the formula for conduction through a hollow cylinder.

Group B (25 Marks)

Answer any three questions (Questions 6 is compulsory)

 

(5)

Q.6 Deduce the formula for calculating the pressure difference in a
simple U Tube manometer.

 

(10)

Q.7 A liquid is flowing through a horizontal straight commercial steel
pipe at 4.57m/s. The pipe used is commercial steel schedule
40.2 in nominal diameter. The viscosity of the liquid is 4.46
cp and the density 801kg/cu.m. Calculate the mechanical energy
friction loss F_f in J/Kg for a 36.6 m pipe.

 

Q.8 An electric wire having a diameter of 1.5mm and covered with a
plastic insulation (thickness = 2.5mm) is exposed to air at 300K
and h₀ = 20W/m²K. The insulation has a k of 0.4W/mK. It is
assumed that the wire surface temperature is constant at 400K and
is not affected by the covering.

a)     

(10)

Calculate the value of critical radius.

b)      Calculate the heat loss per m of wire length with no insulation.

c)      Repeat (b) for insulation present.

Q.9 A thick walled tube of stainless steel (A) having k = 21.63W/mK
with dimensions of 0.0254m ID and 0.0508m OD is covered with 0.0254m layer of asbestos

(10)

(B) insulation k = 0.2423W/mK. The inside wall temperature of the pipe is 811Kand the outside surface of insulation is at 310.8K. For a 0.305m length of pipe.
Calculate the heat loss and also the temperature at the interface
between the metal and the insulation.

 

 

 

(10)

Q.10. A free jet having a velocity of o 30.5m/s and a diameter of
1.0*10^-2 m is deflected by a smooth fixed vane. However the
vane is in the form of a U so that the exit jet travels in the
direction just opposite to the entering jet. Calculate the force of
the jet on the vane.

 

Group C (25 Marks)

 

All Questions are Compulsory.

 

Q. 11 (A) Fill in the Blanks ( Each question carries 2 marks)

i.        _______________________ is a transport process.

ii.      Heat capacity of a substance is defined as ____________________.

iii.    Reynolds Number is equal to _________________________.

iv.    Discharge through a venturimeter is given by _________________________.

v.      Gas moving machinery consists of _______________________.

 

(B) Multiple choice Question (Each question carries 2 marks)

Select the correct answer

i.        The rate of a transfer process of any body is given by

a)      Driving force / Resistance b) Resistance / Driving force c) Driving Force / Conductance

a)      Conductance / Driving Force.

ii.      Mole fraction of H₂O is

(a)    .690

(b)   .425

(c)    .924

(d) None

iii.    The viscosity of air is

(a)                   0.01813

(b)                  0.01372

(c)                   0.43260

(d)                  0.23987

iv.    Which of the following is true

(a)                   k = c + 273.15

(b)                  k = F + 273.15

(c)                   R = c + 460

(d) None

v.      The mole fraction of NaOH is

(a)                   .243

(b)                  .310

(c)                   .453

(d)                  None

(C) Indicate whether following statements are True or False (Each
question carries 1 marks)

i.        Agitation refers to forcing a fluid by mechanical means to flow in a circular or other pattern in a vessel.

ii.      Newtonian fluids are those which doesnt follow Newtons laws.

iii.    Pitot tube is used for the measurement of acceleration.

iv.    The basic equation for Fouriers law of conduction is Rate of transfer process = Driving force/Resistance.

v.      In a static fluid the important property is the pressure in the fluid.

 

 

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