Fluid Mechanics for Chemical Quiz 7
1 / 50
Most of the centrifugal pumps used in chemical plants are usually ______ driven?
2 / 50
Major loss in sudden contraction in pipe flow is due to _________?
3 / 50
In turbulent flow, a rough pipe has the same friction factor as a smooth pipe______?
4 / 50
Laminar flow is characterised by the nonexistence of__________?
5 / 50
Mercury is an ideal barometric fluid mainly due to its ___________?
6 / 50
Multistage compressors are used in industry, because they______?
7 / 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__________?
8 / 50
Interstage coolers are provided in a multistage compressor to______?
9 / 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?
10 / 50
Minimum porosity for fluidisation is______?
11 / 50
Lower BWG means ______ of the tube?
12 / 50
Newton?s law of viscosity relates the______?
13 / 50
Manometers measure the _______ pressure?
14 / 50
Mach number is important in a fluid flow problem, when the inertia and ______ forces predominate?
15 / 50
Location of vena-contracta in an orificemeter does not depend upon the_________?
16 / 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 ?
17 / 50
Navier-Stokes equation is useful in the analysis of ______ fluid flow problems?
18 / 50
Liquid delivery by centrifugal pump starts, only when the head developed by it is equal to the _____ head?
19 / 50
Medium viscosity lubricating oil can be most ideally pumped by a _______ pump?
20 / 50
In the low Reynolds number region, the drag force on a sphere is proportional to________?
21 / 50
Mass velocity is independent of temperature & pressure, when the flow is________?
22 / 50
Molten soap mass is transported by a _______ pump?
23 / 50
Momentum correction factor used in fluid flow problems accounts for the___________?
24 / 50
Isotropic turbulence occurs ___________?
25 / 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?
26 / 50
In turbulent flow, the___________?
27 / 50
Low specific speed of a pump implies that, it is a/an _______ pump?
28 / 50
Mach number is the ratio of the speed of the _______?
29 / 50
Mass velocity in case of steady flow and through a constant cross-section conduit is independent of the __________?
30 / 50
Minimum fluidisation velocity for a specific system depends upon the_____?
31 / 50
In which type of fluid flow, the velocity of flow of fluid changes from point to point in the fluid at any instant ?
32 / 50
It is possible to integrate an automatic flow controller to a_________?
33 / 50
In which of the following body shapes, the pressure drag is large compared to the friction drag ?
34 / 50
Nominal Pipe Size (NPS) of a pipe less than 12 inches in diameter indicates its_________?
35 / 50
N. second/m2 is_____?
36 / 50
In parallel pipe problems, the___________?
37 / 50
Isothermal turbulent flow of a fluid results in decrease of its pressure, which depends on the_______?
38 / 50
Laminar flow of a Newtonian fluid ceases to exist, when the Reynolds number exceeds_____?
39 / 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?
40 / 50
In the complete turbulence zone (in rough pipes), the______?
41 / 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)?
42 / 50
Net positive suction head (NPSH) of a centrifugal pump must be______?
43 / 50
In power law, ? = [A (du/dy)2 + B] then the fluid is___________?
44 / 50
Most commonly used joint in the underground pipe lines is the_________?
45 / 50
In Newton?s law range, the drag co-efficient for the motion of spherical particle in a stationary fluid is_____?
46 / 50
Maintenance cost of a _______ pump for a particular duty is the least?
47 / 50
Momentum transfer in laminar flow of fluids results due to the__________?
48 / 50
In which of the following cases, it is possible for flow to occur from low pressure to high pressure ?
49 / 50
Kinetic energy of fluid per unit weight represented by the velocity head is given by_____?
50 / 50
Multistage centrifugal pumps are generally used for_________?
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