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Fluid Mechanics for Chemical Quiz 7

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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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