Velocity at a certain point in case of streamline flow is
A. Constant
B. Independent of time
C. Both A & B
D. Neither A nor B
Select an option to see the answer and solution.
Bed pressure drop in an air fluidised bed of catalyst particles (ρp = 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
Select an option to see the answer and solution.
In which type of fluid flow, the velocity of flow of fluid changes from point to point in the fluid at any instant?
A. Rotational
B. Unsteady
C. Turbulent
D. Non-uniform
Select an option to see the answer and solution.
If the head over the triangular notch is doubled, the discharge will increase by __________ times.
Select an option to see the answer and solution.
Which of the following pipe bends will incur the largest head loss ?
A. U-bend
B. 30° bend
C. 45° bend
D. 90° bend
Select an option to see the answer and solution.
The fluid in which the shearing stress within it is proportional to the velocity gradient across the sheared section, is called a __________ fluid.
A. Bingham
B. Newtonion
C. Perfect
D. None of these
Select an option to see the answer and solution.
The distance between metacentre and __________ is called metacentric height.
A. Water surface
B. Centre of gravity
C. Centre of buoyancy
D. None of these
Select an option to see the answer and solution.
The __________ pressure is measured by a static tube.
A. Dynamic
B. Static
C. Total
D. None of these
Select an option to see the answer and solution.
Boiler feed water pump is usually a __________ pump.
A. Reciprocating
B. Gear
C. Multistage centrifugal
D. Diaphragm
Select an option to see the answer and solution.
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
Select an option to see the answer and solution.
Foot valves are provided in the suction line of a centrifugal pump to
A. Avoid priming, every time we start the pump
B. Remove the contaminant present in the liquid
C. Minimise the fluctuation in discharge
D. Control the liquid discharge
Select an option to see the answer and solution.
Pumping of a corrosive liquid is generally preferred to be done by a __________ pump, as it can be made of a variety of materials including plastics.
A. Piston
B. Gear
C. Positive displacement
D. Sump
Select an option to see the answer and solution.
Lower BWG means __________ of the tube.
A. Lower thickness
B. Lower cross-section
C. Outer diameter
D. Inner diameter
Select an option to see the answer and solution.
In magnetic flow meters, voltage generation is
A. Due to the motion of conducting fluid through an externally generated uniform field
B. Proportional to the fluid velocity
C. Both A and B
D. Neither A nor B
Select an option to see the answer and solution.
Net positive suction head (NPSH) of a centrifugal pump must be
A. Greater than the vapour pressure of the liquid
B. Less than the vapour pressure of the liquid
C. Equal to the vapour pressure of the liquid
D. Less than barometric pressure
Select an option to see the answer and solution.
In a fully turbulent flow (Re > 105 ) in a pipe of diameter 'd', for a constant pressure gradient, the dependence of volumetric flow rate of an incompressible fluid is
Select an option to see the answer and solution.
A pressure head of 320 metres of water in meters of CCl4 (sp.gr = 1.6) will be
Select an option to see the answer and solution.
A fluidis ( ρ μ = 0.01 c m 2 / sec ) moving at critical flow condition (NRe = 2100) through a pipe of dia 3 cms. Velocity of flow is __________ cm/sec.
Select an option to see the answer and solution.
Drag co-efficient for flow past immersed body is the ratio of __________ to the product of velocity head and density.
A. Shear stress
B. Shear force
C. Average drag per unit projected area
D. None of these
Select an option to see the answer and solution.
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
Select an option to see the answer and solution.