Fluid Mechanics for Chemical-Data Intensity 4 Multiple Questions and Answers.




1.Which is the most efficient and best for measuring very small flow rate of gases ?
A. Venturimeter
B. Orificemeter
C. Rotameter
D. Flow nozzle

2.For laminar flow of a fluid through a packed bed of spheres of diameter d, the pressure drop per unit length of bed depends upon the sphere diameter as___?
A. d
B. d2
C. d4
D. d? 2

3.For laminar flow of Newtonian fluid in a circular pipe, the velocity distribution is a function of the distance �d� measured from the centre line of the pipe, and it follows a ____ relationship?
A. Logarithmic
B. Parabolic
C. Hyperbolic
D. Linear

4.What is the shear rate at the pipe wall, in case of laminar flow of Newtonian fluids in a pipe of diameter �D� & length �L� incurring a pressure drop �?p� with average velocity �Vavg� ?
A. D ?p/8L
B. D ?p/4L
C. 8 Vavg/D
D. 4 Vavg/D

5.For turbulent flow of Newtonian fluid in a circular cross-section pipe, the ratio of maximum to average fluid velocity is ____?
A. 0.5
B. 1
C. 0.66
D. < 0.5

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