What is the co-efficient of contraction, if a fluid jet discharging from a 50 mm diameter orifice has a 40 mm diameter at its vena-contracta ?
A. 0.64
B. 1.65
C. 0.32
D. 0.94
Fluid Mechanics for Chemical
For Laminar flow through a packed bed, the pressure drop is proportional to (Vs is the superficial liquid velocity and Dp is the particle diameter) ?
For Laminar flow through a packed bed, the pressure drop is proportional to (Vs is the superficial liquid velocity and Dp is the particle diameter) ?
A. Vs/Dp2
B. Vs2/Dp2
C. Vs2/Dp3
D. Vs/Dp3
Vena-contracta formed during flow of a liquid through an orificemeter has__________________?
Vena-contracta formed during flow of a liquid through an orificemeter has__________________?
A. Minimum liquid cross-section
B. More diameter compared to orifice diameter
C. Minimum velocity of fluid stream
D. None of these
The pitot static tube does not measure the _____________ pressure?
The pitot static tube does not measure the _____________ pressure?
A. Static
B. Total
C. Difference in static & dynamic
D. All A., B. and C.
The unit of dynamic viscosity in SI unit is__________________?
The unit of dynamic viscosity in SI unit is__________________?
A. kg/m. sec
B. N/m2
C. m2 /sec
D. m/N. sec
Power loss in an orificemeter is _____________ that in a Venturimeter?
Power loss in an orificemeter is _____________ that in a Venturimeter?
A. Less than
B. Same as
C. More than
D. Data insufficient, cannot be predicted
Which of the following has the minimum compressibility ?
Which of the following has the minimum compressibility ?
A. Water at room temperature
B. Air at room temperature
C. Oxygen at room temperature
D. Nitrogen at room temperature
The net positive suction head (NPSH) of a centrifugal pump is defined as the sum of the velocity head and the pressure head at the_________________?
The net positive suction head (NPSH) of a centrifugal pump is defined as the sum of the velocity head and the pressure head at the_________________?
A. Discharge
B. Suction
C. Suction minus vapor pressure of the liquid at suction temperature
D. Discharge minus vapor pressure of the liquid at the discharge temperature
Boundary layer thickness in turbulent flow over a flat plate increases as(where, d = distance from the leading edge.) ?
Boundary layer thickness in turbulent flow over a flat plate increases as(where, d = distance from the leading edge.) ?
A. √d
B. d2/3
C. d4/5
D. d1/3
Mach number is important in a fluid flow problem, when the inertia and _____________ forces predominate?
Mach number is important in a fluid flow problem, when the inertia and _____________ forces predominate?
A. Elastic
B. Viscous
C. Gravity
D. None of these