Fluid Mechanics for Chemical Quiz 11

1 / 50

**The hydraulic radius for flow in a rectangular duct of cross-sectional dimension H, W is_____?**

2 / 50

**The net positive suction head (NPSH) of a centrifugal pump is defined as the sum of the velocity head and the pressure head at the__________?**

3 / 50

**The maximum depth from which a centrifugal pump can draw water is_________?**

4 / 50

**The line traced by a single fluid particle as it moves over a period of time is called _______ line?**

5 / 50

**The most important factor, which determines the maximum height to which water can be lifted by a pump at standard temperature is the_______?**

6 / 50

**The losses in open channel flow generally vary as the _________?**

7 / 50

**The head loss in turbulent flow in pipe is proportional to(where, V = velocity of fluid through the pipe) ?**

8 / 50

**The fluid in which the shearing stress within it is proportional to the velocity gradient across the sheared section, is called a ______ fluid?**

9 / 50

**The percentage slip in a reciprocating pump set is given by the % of (where, Q1 = actual discharge Q2 = theoretical discharge) ?**

10 / 50

**The location of centre of pressure, which defines the point of application of the total pressure force on the surface, can be calculated by applying the principle of moments according to which ?sum of the moment of the resultant force about an axis is equal to the sum of the components about the same axis?. The centre of pressure of a rectangular surface (of width ?w?) immersed vertically in a static mass of fluid is at a depth of (where, y = depth of the liquid) ?**

11 / 50

**The friction factor is_____?**

12 / 50

**The Navier-Stokes equation deals with the law of conservation of_____?**

13 / 50

**The friction factor for turbulent flow in a hydraulically smooth pipe_______?**

14 / 50

**The most economical flow control valve for use with large diameter pipes is a___________?**

15 / 50

**The Mach number for hypersonic flow of compressible fluid is______?**

16 / 50

**The hydrodynamic and thermal boundary layers will merge, when ______?**

17 / 50

**The maximum head that can be developed by a single impeller is ______ ft?**

18 / 50

**The length of the tube necessary for the boundary layer to reach the centre of the tube and for fully developed flow to be established is called the ______ length?**

19 / 50

**The pipe wall thickness is minimum for a pipe of given nominal size having schedule number_____?**

20 / 50

**The fluid velocity varies as the square root of the cylindrical pipe diameter in case of steady state laminar flow at constant pressure drop of ______ fluid?**

21 / 50

**The phenomenon occuring during pumping of a liquid solution containing dissolved gases, which may come out of the solution giving rise to gas pockets, is termed as________?**

22 / 50

**The hydraulic diameter of an annulus of inner and outer radii Ri and Ro respectively is_____?**

23 / 50

**The most suitable flow measuring device for the fluid flow measurement in a very large diameter pipeline is a______?**

24 / 50

**The main factor on which the behaviour of a mass of fluidised solid depends mainly is the_____?**

25 / 50

**The maximum delivery pressure of a reciprocating compressor may be about _______ kg/cm2?**

26 / 50

**The peripheral velocity at inlet of a centrifugal pump having inlet diameter of 25 cms and rotating at 950 rpm is __________ m/sec?**

27 / 50

**The maximum discharge through a circular channel takes place, when the depth of the fluid flow is _______ times the pipe diameter?**

28 / 50

**The maximum delivery pressure of compressors can be upto ______ atmospheres?**

29 / 50

**The inherent characteristic of an equal percentage valve relating flow rate ?q? with valve stem movement ?x? are described by the equation__________?**

30 / 50

**The fluid velocity varies as the cube of the cylindrical pipe diameter in case of steady state laminar flow at constant pressure drop for _____ fluid?**

31 / 50

**The most serious disadvantage of an orificemeter is that_________?**

32 / 50

**The line of action of the buoyant force passes through the centre of gravity of the_________?**

33 / 50

**The normal stress is the same in all directions at a point in a fluid, when the fluid is___________?**

34 / 50

**The momentum correction factor for the velocity distribution of laminar flow is______?**

35 / 50

**The kinetic energy correction factor for velocity distribution of laminar flow is__________?**

36 / 50

**The fluid velocity varies as the square of the cylindrical pipe diameter, in case of steady state laminar flow at constant pressure drop, for _______ fluid?**

37 / 50

**The head developed by a centrifugal pump is largely determined by the______?**

38 / 50

**The fluid property, due to which, mercury does not wet the glass is___________?**

39 / 50

**The fluid jet discharging from a 2? diameter orifice has a diameter of 1.75? at its venacontracta. The co-efficient of contraction is_____?**

40 / 50

**The flow of gas along a pipe in the direction of decreasing pressure causes decrease in its___________?**

41 / 50

**The lift of a balloon is__________?**

42 / 50

**The general relationship between speed N, head H, power P and discharge Q for a centrifugal pump is__________?**

43 / 50

**The head loss in turbulent flow in a pipe varies_________?**

44 / 50

**The head loss due to sudden expansion is___________?**

45 / 50

**The head loss due to sudden contraction is proportional to_____?**

46 / 50

**The head loss in turbulent flow in a pipe varies__________?**

47 / 50

**The line of action of the buoyant force acts through the______?**

48 / 50

**The nominal size of a hose pipe is specified by its __________?**

49 / 50

**The fluid property which matters for falling rain drops to acquire spherical shape is its___________?**

50 / 50

**The frictional resistance in laminar flow does not depend on the__________?**

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