Consider a centrifugal pump having a specific impeller diameter, fixed impeller speed pumping a liquid of constant density at a particular discharge capacity. With decrease in the capacity of the pump, the __________ decreases.
Which of the following is an undesirable property of a manometric liquid ?
Which of the following options will facilitate the achievement of a very high head (saymetres) in case of a centrifugal pump?
N2Re/NFr is called the __________ number.
The ratio of hydrodynamic boundary layer to thermal boundary layer thickness in case of liquid metals is
A venturimeter can not be used for the direct measurement of
A centrifugal pump is called a turbine pump, if it is having a
When the water is warm, the height to which it can be lifted by a pump
Check valves are used
A mercury (specific gravity = 13.manometer connected across an orificemeter fitted in a pipe shows a manometer reading of 2 cms. If the manometer liquid is changed to carbon tetrachloride (specific gravity = 1.6), then for the same flow rate of water the new manometer reading will be __________ cms.
Where does the maximum stress occur in case of laminar flow of incompressible fluid in a closed conduit of diameter 'd'?
In a fluidised bed reactor
Experimental study of laminar fluid flow through a circular tube was conducted by
The uniformity of a gas fluidised bed depends upon the __________ of the solid particles.
Fluid flow at increasing rate through a diverging pipe is an example of __________ flow.
Theoretical head developed by a centrifugal pump does not depend upon the __________ the impeller.
If more than two branches of pipes are to be connected at the same point, then use a/an
Reciprocating pumps are not able to compete with the centrifugal pump for industrial use, mainly because these pumps have
Turbulent flow generally occurs for cases involving
Reynolds number is the ratio of
A mercury (specific gravity = 13.manometer connected across an orificemeter fitted in a pipe shows a manometer reading of 2 cms. If the manometer liquid is changed to carbon tetrachloride (specific gravity = 1.6), then for the same flow rate of water the new manometer reading will be __________ cms.
An equipotential line is __________ to the velocity vector at every point.
In area meter (e.g., rotameter), with increase in the fluid flow rate, the
Drag co-efficient in hindered settling is __________ that in free settling.
In case of end to end connection of two or more pipes in series, the __________ each pipe.
The general relationship between speed N, head H, power P and discharge Q for a centrifugal pump is
The peripherial velocity at inlet of a centrifugal pump having inlet diameter ofcms and rotating atrpm is __________ m/sec.
A double acting reciprocating pump compared to a single acting pump (of almost same size working under same pressure levels) would give almost double
Drag co-efficient in hindered settling is __________ that in free settling.
Pipes having diameterinches or more are designated by their
The flow of a liquid through tapering pipe at a constant rate is an example of __________ flow.
The most economical flow control valve for use with large diameter pipes is a
The temperature in isentropic flow
In case of a centrifugal pump, the ratio of total delivered pressure to pressure developed with the impeller is called the __________ efficiency.
Which is the correct relationship for a centrifugal pump ? (where, D = Impeller diameter, inches H = Head developed, ft of liquid pumped N = Speed of pump, rpm)
Lower BWG means __________ of the tube.
Liquid delivery by centrifugal pump starts, only when the head developed by it is equal to the __________ head.
The frictional resistance in laminar flow does not depend on the
In case of a centrifugal pump, the ratio of total delivered pressure to pressure developed with the impeller is called the __________ efficiency.
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
Efficiency of power transmission (η) through a circular pipe is given by (ht - hf)/ht, which has a maximum value of __________ percent.
Which of the following equations applies to the fluid flow through a packed bed for very large Reynolds number ?
What is the ratio of the velocity at the axis of the pipe to the mean velocity of flow in case of pipe flow under viscous condition ?
Laminar flow is characterised by the nonexistence of
Which of the following is used for very accurate measurement of flow of gas at low velocity ?
Viscosity of water at 40°C lies in the range of
Pick out the correct statement pertaining to transition/ entrance length in fluid flow.
Each term in Bernaulli's equation represents the __________ of the fluid.
Which of the following is used for very accurate measurement of flow of gas at low velocity ?
The discharge through a venturimeter depends upon