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.Management Sciences
Category: Fluid Mechanics
A ship whose hull length is 100 m is to travel at 10 m/sec. For dynamic similarity, at what velocity should a 1:25 model be towed through water ?
A. 10 m/sec
B. 25 m/sec
C. 2 m/sec
D. 50 m/sec
E. 250 m/sec
Alcohol is used in manometer, because____________________?
A. its vapour pressure is low
B. it provides suitable meniscus for the inclined tube
C. its density is less
D. it provides longer length for a given pressure difference
E. it provides accurate readings
In an isothermal atmosphere, the pressure___________________?
A. decreases linearly with elevation
B. remains constant
C. varies in the same way as the density
D. increases exponentially with elevation
E. unpredictable
The velocity of jet of water travelling out of opening in a tank filled with water is proportional to_________________?
A. head of water (h)
B. h2
C. V/T
D. h2
E. h3/1
The flow in which the velocity vector is identical in magnitude and direction at every point, for any given instant, is known as________________?
A. one dimensional flow
B. uniform flow
C. steady flow
D. turbulent flow
E. streamline flow
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
For pipes, turbulent flow occurs when Reynolds number is _____________________?
A. less than 2000
B. between 2000 and 4000
C. more than 4000
D. less than 4000
E. none of the above
Property of a fluid by which its own molecules are attracted is called___________________?
A. adhesion
B. cohesion
C. viscosity
D. compressibility
E. surface tension
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
Which of the following is the unit of kinematic viscosity _________________?
A. pascal
B. poise
C. stoke
D. faraday
E. none of the above
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