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.Management Sciences
Category: Fluid Mechanics for Chemical
When the pipe Reynold’s number is 6000, the flow is generally___________________?
A. Viscous
B. Laminar
C. Turbulent
D. Transition
An ideal fluid is___________________?
A. Frictionless & incompressible
B. One, which obeys Newton’s law of viscosity
C. Highly viscous
D. None of these
In case of centrifugal fan or blower, the gas capacity varies as __________________?
A. Speed
B. (Speed)2
C. (Speed)3
D. (Speed)0.5
The co-efficient of discharge of an orificemeter is a function of ________________?
A. Reynolds number at the orifice
B. Ratio of orifice dia to pipe dia
C. Both A. and B.
D. None of the above parameters, and has a constant value of 0.61
In deriving Bernoulli’s equation, fluid is assumed to be________________?
A. Incompressible, frictionless, steady, along a streamline
B. Uniform, steady, incompressible, along a streamline
C. Steady, density being pressure dependent, frictionless
D. None of these
If the discharge of a centrifugal pump is throttled, then its suction lift_______________________?
A. Increases
B. Decreases
C. Remains unchanged
D. Data insufficient to predict
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 ?
A. Increases linearly with V
B. Decreases linearly with V
C. Decreases as V2
D. None of these
Non-colloidal solution is an example of the _______________ fluid?
A. Non-Newtonian
B. Newtonian
C. Dilatent
D. Pseudo-plastic
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