A. Constant
B. Independent of time
C. Both A. & B.
D. Neither A. nor B.
Related Mcqs:
- The ratio of maximum to average velocity in case of streamline flow between parallel plates is______________________?
A. 1
B. 1.5
C. 2
D. 2.5 - What is the ratio of the velocity at the axis of the pipe to the mean velocity of flow in case of pipe flow under viscous condition ?
A. 0.5
B. 0.67
C. 1
D. 2 - Bernoulli’s equation for fluid flow is derived following certain assumptions. Out of the assumptions listed below, which set of assumptions is used in derivation of Bernoulli’s equation? A. Fluid flow is frictionless & irrotational. B. Fluid flow is steady. C. Fluid flow is uniform & turbulent. D. Fluid is compressible. E. Fluid is incompressible ?
A. A, C, D
B. B, D, E
C. A, B, E
D. A, D, E - In case of unsteady fluid flow, conditions & flow pattern change with the passage of time at a position in a flow situation. Which of the following is an example of unsteady flow ?
A. Discharge of water by a centrifugal pump being run at a constant rpm
B. Water flow in the suction and discharge pipe of a reciprocating pump
C. Water discharge from a vertical vessel in which constant level is maintained
D. Low velocity flow of a highly viscous liquid through a hydraulically smooth pipe - Cd, Cc and Cv are related (for flow through an orifice) as (where, Cd = discharge co-efficient, Cc = co-efficient of contraction = (area of jet at vena-contracta/area of opening), Cv = co-efficient of velocity = (actual velocity at vena-contracta/theoretical velocity)?
A. Cd = Cc/Cv
B. Cd = Cc.Cv
C. Cd = Cv/ Cc
D. None of these - A streamline is_________________?
A. The line connecting the mid-points of flow cross-sections
B. Defined for uniform flow only
C. Drawn normal to the velocity vector at every point
D. Always the path of a particle - In case of turbulent flow of a Newtonian fluid in a straight pipe, the maximum velocity is equal to (where, Vavg = average fluid velocity)?
A. Vavg
B. 1.2 Vavg
C. 1.5 Vavg
D. 1.8 Vavg - The ratio of average fluid velocity to the maximum velocity in case of laminar flow of a Newtonian fluid in a circular pipe is_____________________?
A. 0.5
B. 1
C. 2
D. 0.66 - A streamline is a line in flow field _________________?
A. That is traced by all the fluid particles passing through a given point
B. Along which a fluid particle travels
C. Such that at every point on it, the velocity is tangential to it
D. None of these - The ratio of the hydraulic radius to the diameter of the channel, for maximum mean velocity of flow in a circular channel, in open channel flow is_________________?
A. 0.3
B. 0.9
C. 0.03
D. 0.66
