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A. is steady
B. is one dimensional
C. velocity is uniform at all the cross sec-tions
D. all of the above
E. none of the above
Answer
Answer
D. all of the above
Submitted by: Engr. Abdul Hafeez
According to Bernoulli’s equation for steady ideal fluid flow_______________?
A. principle of conservation of mass holds
B. velocity and pressure are inversely proportional
C. total energy is constant throughout
D. the energy is constant along a stream-line but may vary across streamlines
E. none of the above
Answer
Answer
D. the energy is constant along a stream-line but may vary across streamlines
Submitted by: Engr. Abdul Hafeez
Mach number is significant in___________________?
A. supersonics, as with projectiles and jet propulsion
B. full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc.
C. simultaneous motion through two fluids where there is a surface of dis-continuity, gravity force, and wave making effects, as with ship’s hulls
D. all of fhe above
E. none of the above
Answer
Answer
A. supersonics, as with projectiles and jet propulsion
Submitted by: Engr. Abdul Hafeez
The total energy of each particle at various places in the case of perfect incompres sible fluid flowing in continuous sream________________?
D. keeps on increasing
B. keeps on decreasing
C. remains constant
D. may increase/decrease
E. unpredictable
Answer
Answer
C. remains constant
Submitted by: Engr. Abdul Hafeez
Two pipe systems can be said to be equivalent, when the following quantites are same______________?
A. friction loss and flow
B. length and diameter
C. flow and length
D. friction factor and diameter
E. velocity and diameter
Answer
Answer
A. friction loss and flow
Submitted by: Engr. Abdul Hafeez
In a forced vortex, the velocity of flow everywhere within the fluid is__________________?
A. maximum
B. minimum
C. zero
D. non-zero finite
E. unpredictable
Answer
Answer
D. non-zero finite
Submitted by: Engr. Abdul Hafeez
Select the correct statement ?
A. Local atmospheric pressure depends upon elevation of locality only
B. Standard atmospheric pressure is the mean local atmospheric pressure a* sea level
C. Local atmospheric pressure is always below standard atmospheric pressure
D. A barometer reads the difference be-tween local and standard atmospheric pressure
E. Gauge piessure is equal to atmospheric pressure plus instrument reading
Answer
Answer
B. Standard atmospheric pressure is the mean local atmospheric pressure a* sea level
Submitted by: Engr. Abdul Hafeez
Choose the wrong statement ?
A. The center of buoyancy is located at the center of gravity of the displaced liquid
B. For stability of a submerged body, the center of gravity of body must lie directly below the center of buoyancy
C. If e.g. and center of buoyancy coincide, the submerged body must lie at neutral equilibrium for all positions
D. For stability of floating cylinders or spheres, the e.g. of body must lie below the center of buoyancy
E. All floating bodies are stable
Answer
Answer
E. All floating bodies are stable
Submitted by: Engr. Abdul Hafeez
Choose the wrong statement?
A. fluids are capable of flowing
B. fluids conform to the shape of the con-taining vessels
C. when in equilibrium, fluids cannot sustain tangential forces
D. when in equilibrium, fluids can sustain shear forces
E. fluids have some degree of compressibility and offer little resistance to form
Answer
Answer
D. when in equilibrium, fluids can sustain shear forces
Submitted by: Engr. Abdul Hafeez
Choose the wrong statement________________?
A. Viscosity of a fluid is that property which determines the amount of its resistance to a shearing force
B. Viscosity is due primarily to interaction between fluid molecules
C. Viscosity of liquids decreases with in-crease in temperature
D. Viscosity of liquids is appreciably affected by change in pressure
E. Viscosity is expressed as poise, stoke, or saybolt seconds
Answer
Answer
D. Viscosity of liquids is appreciably affected by change in pressure
Submitted by: Engr. Abdul Hafeez