National Institute of Technology 2006 B.Tech Chemical Engineering MOMENTUM TRANSFER (OBER ) - Question Paper

,rd
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.