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.Management Sciences
Category: Fluid Mechanics for Chemical
The value of critical Reynolds number for pipe flow is_________________?
A. 1,300
B. 10,000
C. 100,000
D. None of these
Check valve is used for ________________ flow?
A. Very precise control of
B. Unidirectional
C. Multidirectional
D. None of these
Air vessel of a reciprocating pump is initially filled with___________________?
A. Atmospheric air
B. Compressed air
C. Water
D. None of these
Reynolds number for water flow through a tube of I.D. 5 cm is 1500. If a liquid of 5 centipoise viscosity and 0.8 specific gravity flows in the same pipe at the same velocity, then the pressure drop will______________________?
A. Increase
B. Decrease
C. Remain same
D. Data insufficient to predict pressure drop
Pressure co-efficient is the ratio of pressure forces to __________________________ forces?
A. Gravity
B. Inertial
C. Viscous
D. None of these
If the head over the triangular notch is doubled, the discharge will increase by ______________ times?
A. 2
B. 2.828
C. 5.657
D. 4
Which of the following conditions must be satisfied for lift force to be developed ?
A. The body should be bluff body
B. The body should be stream lined
C. Circulation around the body is essentially required
D. The main stream velocity must approach the velocity of sound in that fluid medium
____________ is used for measuring the static pressure exerted on the wall by a fluid flowing parallel to the wall in a pipeline?
A. Venturimeter
B. Pressure gauge
C. Pitot tube
D. Orificemeter
The lift of a balloon is_________________?
A. Increased, as it rises to a higher altitude
B. Due to the weight of the atmospheric air, that it displaces
C. Not dependent on the temperature of the atmosphere
D. None of these
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