Fluid Mechanics for Chemical Quiz 2
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An ideal plastic substance indicates no deformation, when stressed upto yield stress, but behaves like a Newtonian fluid beyond yield stress. Which of the following is an ideal plastic ?
2 / 50
A rectangular surface 3? ? 4?, has the lower 3 edge horizontal and 6? below a free oil surface (sp. gr. 0.8). The surface inclination is 300 with the horizontal. The force on one side of the surface is (where, y = specific weight of water) ?
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Absolute viscosity of a fluid is a function of the __________ of the fluid?
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At high Reynolds number__________?
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Baffles in mixing tanks are provided to___________?
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A pressure head of 320 metres of water in meters of CCl4 (sp.gr = 1.6) will be___________?
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A Rotameter works on the principle of ________ pressure drop?
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At low Reynolds number_______?
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A Venturimeter measures the_____?
10 / 50
A tube is specified by its______?
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All pipes of a particular nominal size have the same__________?
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A Pitot tube indicates 5 cm of water (manometer) when it is being used for measuring velocity of air. The velocity of air in m/sec is_____?
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A weir is used to measure the large water discharge rate from a river or from an open channel. A weir is not of ________ shape?
14 / 50
A special type of liquid transporting device is the diffuser pump, in which ______ are minimised?
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A spherical particle is falling slow in a viscous liquid such that Reynolds number is less than 1. Which statement is correct for this situation ?
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A stream line is_____?
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Actual lift of a pump is always less than the theoretical lift and is limited by the_____?
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Bernoulli?s equation is not applicable, when the flow is_____?
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A streamline is__________?
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Air vessel provided in a reciprocating pump___________?
21 / 50
Acceleration head in a reciprocating pump_________?
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An equipotential line is ______ to the velocity vector at every point?
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Air vessel of a reciprocating pump is initially filled with_____?
24 / 50
A pressure of 10 m head of water is equivalent to _______ kN/m2?
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Applicability of Bernoulli?s equation is limited to a/an ______ fluid, that does not exchange shaft work with the surroundings?
26 / 50
Boundary layer separation is caused by the ______?
27 / 50
Boiler feed water pump is usually a _______ pump?
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A stream tube is that, which has ________ cross-section entirely bounded by stream lines?
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Bernoulli?s equation for steady, frictionless, continuous flow states that the _______ at all sections is same?
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An ideal fluid is_____?
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Bernoulli?s equation is dependent on the___________?
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Bernoulli?s equation does not apply to the functioning of a/an___________?
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Bernoulli?s equation accounts for the_______?
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A streamline is a line in flow field __________?
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Bed pressure drop in an air fluidised bed of catalyst particles (?p = 200 kg/m3, Dp = 0.05 cm) of 60 cm bed depth and bed porosity of 0.5 expressed in cm of water (manometer) is_________?
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An isentropic process is the one, in which__________?
37 / 50
Bernoulli?s equation describes the ________?
38 / 50
Boundary layer separation is caused by the__________?
39 / 50
At what value of crank angle (roughly), no flow of water from or into the air vessel takes place in case of a double acting reciprocating pump ?
40 / 50
As per Newton?s law of viscosity, the shear stress for a given rate of angular deformation of fluid is proportional to (where, ? = fluid viscosity) ?
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Air vessel fitted to a reciprocating pump______?
42 / 50
A pump operating under specific conditions delivers insufficient quantity of liquid. This may be set right by_________?
43 / 50
Boundary layer exists in flow__________?
44 / 50
Assuming flow to be laminar, if the diameter of the pipe is halved, then the pressure drop will________?
45 / 50
Air vessel provided in a reciprocating pump is for___________?
46 / 50
A relief valve___________?
47 / 50
As the velocity V and thus the Reynolds number of a flow past a sphere increases from very low value, the drag force for Re << 1 ?
48 / 50
Applying a pressure drop across a capillary results in a volumetric flow rate ?Q? under laminar flow conditions. The flow rate for the same pressure drop, in a capillary of the same length but half the radius is______?
49 / 50
At a constant speed of the centrifugal pump, it?s ______ the impeller diameter?
50 / 50
An ideal nozzle design aims at_________?
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