A. Reynolds number (based on sphere diameter) should be < 1
B. Flow around the sphere should be in turbulent region
C. Sphere must be metallic
D. Fluid density should be constant
Related Mcqs:
- __________________ fluid force is not considered in the Navier-Stokes equation?
A. Turbulent
B. Viscous
C. Gravity
D. Pressure - In a counter flow heat exchanger, hot fluid enters at 170°C & leaves at 150°C, while the cold fluid enters at 50°C & leaves at 70°C. The arithmetic mean temperature difference in this case is ______________ °C?
A. 20
B. 60
C. 120
D. ∞ - Consideration of the creep is the most important in case of the_____________________?
A. Blades of gas turbine
B. Piston of an I. C. engine
C. Flywheel of steam engine
D. Cycle chain - Gage pressure within a spherical droplet of a fluid is ‘p’. What will be gage pressure within a bubble of the same size & of the same fluid ?
A. p
B. 2 p
C. 0.5 p
D. 0.25 p - A fluid is termed as the Newtonian fluid, when the shear stress is _________________ the velocity gradient ?
A. Independent of
B. Inversely proportional to
C. Directly proportional to
D. None of these - Reynolds number of a fluid flowing in a circular pipe is 10,000. What will be the Reynolds number when the fluid velocity is decreased by 30% & the pipe diameter is increased by 30% ?
A. 9,100
B. 13,000
C. 7,000
D. 2,550 - A dummy activity is used in PERT network to describe the_____________________?
A. Precedence relationship
B. Resource idleness
C. Resource restriction
D. Necessary time delay - Sudden fall of atmospheric pressure by a large amount is an indication of the_____________________?
A. Rain
B. Cold wave
C. Storm
D. Fair weather - A dense structure of grinding wheel is not used for the_____________________?
A. Ductile material
B. Hard materials
C. Brittle materials
D. Finishing cuts - A compact estimate about the amount of materials handling between various work stations is obtained from the_____________________?
A. Gantt chart
B. Bin chart
C. String diagram
D. Travel chart
