Fluid Mechanics for Chemical Quiz 7

1 / 50

**In which of the following body shapes, the pressure drag is large compared to the friction drag ?**

2 / 50

**Momentum transfer in laminar flow of fluids results due to the__________?**

3 / 50

**Mach number is the ratio of the speed of the _______?**

4 / 50

**In parallel pipe problems, the___________?**

5 / 50

**Maximum theoretical suction lift for water at 15?C by a centrifugal pump is 34 ft. The same for water at 90?C will be _______ ft?**

6 / 50

**Mercury is an ideal barometric fluid mainly due to its ___________?**

7 / 50

**Minimum porosity for fluidisation is______?**

8 / 50

**In turbulent flow, a rough pipe has the same friction factor as a smooth pipe______?**

9 / 50

**Laminar flow is characterised by the nonexistence of__________?**

10 / 50

**N. second/m2 is_____?**

11 / 50

**In the complete turbulence zone (in rough pipes), the______?**

12 / 50

**Net positive suction head (NPSH) of a centrifugal pump must be______?**

13 / 50

**Laminar flow of a Newtonian fluid ceases to exist, when the Reynolds number exceeds_____?**

14 / 50

**In power law, ? = [A (du/dy)2 + B] then the fluid is___________?**

15 / 50

**In which of the following cases, it is possible for flow to occur from low pressure to high pressure ?**

16 / 50

**Major loss in sudden contraction in pipe flow is due to _________?**

17 / 50

**Newton?s law of viscosity relates the______?**

18 / 50

**Most commonly used joint in the underground pipe lines is the_________?**

19 / 50

**Mass velocity in case of steady flow and through a constant cross-section conduit is independent of the __________?**

20 / 50

**In the low Reynolds number region, the drag force on a sphere is proportional to________?**

21 / 50

**Mach number is defined as the ratio of the local flow velocity to the sonic velocity in the fluid. For what value of Mach number, the gases are considered incompressible ?**

22 / 50

**Liquid delivery by centrifugal pump starts, only when the head developed by it is equal to the _____ head?**

23 / 50

**Most of the centrifugal pumps used in chemical plants are usually ______ driven?**

24 / 50

**In turbulent flow, the___________?**

25 / 50

**In Newton?s law range, the drag co-efficient for the motion of spherical particle in a stationary fluid is_____?**

26 / 50

**It is possible to integrate an automatic flow controller to a_________?**

27 / 50

**In open channel flow in a rectangular channel, the ratio between the critical depth and the initial depth, when a hydraulic jump occurs is__________?**

28 / 50

**Lower BWG means ______ of the tube?**

29 / 50

**Isotropic turbulence occurs ___________?**

30 / 50

**Multistage centrifugal pumps are generally used for_________?**

31 / 50

**Manometers measure the _______ pressure?**

32 / 50

**Low specific speed of a pump implies that, it is a/an _______ pump?**

33 / 50

**In the Newton?s law range, the terminal velocity of a solid spherical particle falling through a stationary fluid mass is _______ the fluid viscosity?**

34 / 50

**Momentum correction factor used in fluid flow problems accounts for the___________?**

35 / 50

**Mass velocity is independent of temperature & pressure, when the flow is________?**

36 / 50

**Maintenance cost of a _______ pump for a particular duty is the least?**

37 / 50

**Navier-Stokes equation is useful in the analysis of ______ fluid flow problems?**

38 / 50

**Isothermal turbulent flow of a fluid results in decrease of its pressure, which depends on the_______?**

39 / 50

**In which type of fluid flow, the velocity of flow of fluid changes from point to point in the fluid at any instant ?**

40 / 50

**In the laminar boundary layer flow over a flat plate, the ratio (?/x) varies as: (where, ??? is the boundary layer thickness and ?x? is the distance from the leading edge in the direction of flow)?**

41 / 50

**Minimum fluidisation velocity for a specific system depends upon the_____?**

42 / 50

**Multistage compressors are used in industry, because they______?**

43 / 50

**Molten soap mass is transported by a _______ pump?**

44 / 50

**Nominal Pipe Size (NPS) of a pipe less than 12 inches in diameter indicates its_________?**

45 / 50

**In Newton?s law range, the terminal velocity of a solid spherical particle falling through a stationary fluid mass varies as the _______ of its diameter?**

46 / 50

**Medium viscosity lubricating oil can be most ideally pumped by a _______ pump?**

47 / 50

**Interstage coolers are provided in a multistage compressor to______?**

48 / 50

**Location of vena-contracta in an orificemeter does not depend upon the_________?**

49 / 50

**Kinetic energy of fluid per unit weight represented by the velocity head is given by_____?**

50 / 50

**Mach number is important in a fluid flow problem, when the inertia and ______ forces predominate?**

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