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Engineering :: Fluid Mechanics and Hydraulic Machines

221.  If a centrifugal pump is noisy in operation, the cause may be
A. Priming faulty B. Suction head too high
C. Air in water D. Discharge head too high
E. Mechanical defect    
222.  In axial flow turbines
A. Water enters radially but leaves axially B. Water enters axially but leaves radially
C. Water enters at an angle but leaves axially D. Water enters axially and leaves axially
E. None of the above    
223.  Mixed flow turbine are
A. Radial inward flow type B. Radial outward flow type
C. Partly rdial partly axial D. Parallel flow type
E. None of the above    
224.  In an impulse turbine
A. Water must be admitted over the whole circumference B. It is not possible to regulate the flow without loss
C. Wheel must run full and kept entirely submerged in water below the tailrace D. The pressure in the driving fluid as it moves over the vanes is atmospheric
E. None of the above    
225.  In MLT system the dimensions of angular momentum would be
A. MLT-1 B. ML2T
C. ML2T-1 D. ML2T-2
E. MLT-2    
226.  Which of the following forces do not act on fluids
A. Inertia B. Viscous force
C. Gravity D. Pressure
E. Torsion    
227.  Which of the following forces does not act in case of fluids?
A. Centrifugal force B. Tensile force
C. Vibratory force D. Elastic force
E. Gravity force    
228.  Capillarity is due to
A. Cohesion B. Adhesion
C. Adhesion and cohesion D. Molecular structure
E. Gravity    
229.  The pressure in metres of oil (specific gravity 0.85) equivalent to 42.5 m of water is
A. 42.5 m B. 50 m
C. 52.5 m D. 85 m
E. 100 m    
230.  In order to avoid a correction for the effect of capillarity in manometers, the diameter of the tube should be
A. Less than 1 mm B. Less than 3 mm
C. Less than 4.5 mm D. Greater than or equal to 6 mm
E. None of the above    

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