National Institute of Technology 2006 B.Tech Chemical Engineering 3rd SEMESTER-CHEMICAL ENGGMID-TERM [OBER ] - Question Paper

MOMENTUM TRANSFER
3ra SEMESTER-CHEMICAL ENGG. MID-TERM examination. [OCTOBER 2006]
Time: 1:30 HOURS


ans all ques. presume any missing data suitably

MAX. MARKS 50


1. Write a note on the Rheological classification of fluids.


2. A differential manometer is connected at the 2 points A & B of 2 pipes. The pipe A contains a liquid if specific gravity 1.5 while pipe B contains a liquid if specific gravity 0.9.The pressure at A& B is one kgf/cm2 & 1.8 kgf/cm2 respectively. obtain the difference in mercury level in the differential manometer.
[6]
[8]


3. Derive the equations for Flow through a horizontal circular pipe.
[10]


4. What is the viscosity of a fluid which requires 40sec for flow of 16cc through a capillary
tube viscometer having a tube diameter of 2mm & length of 30cm? The pressure difference
is equivalent to 20cm of water.
[8]


5. Explain Prandtl's mixing length theory.
[8]


6. Water is flowing through a 3cm inner diameter tube. The pressure drop resulting is 0.1
gmf/cm2 per cm length of the tube. obtain the point velocity, Eddy diffusivity & Prandtl
mixing length at y = R/2 where R is the radius of the tube. Viscosity of water may be taken
as one C.P & density as one gmf/cm2 .
[10]

Earning:   Approval pending.