Related Questions

Probability of cavitation occuring becomes very high, when the local __________ resulting in water bubbles formation, which on rupture cause cavitation
A Pressure falls below the vapour pressure
B Pressure becomes very high
C Temperature becomes low
D All of the above
Cavitation in a pump creates so many undesirable effects. Out of the following, which is not an undesirable effect created by cavitation?
A Decrease in effect
B Increase in thrust
C Develops noise
D Develops high pressure
In fluid flow, cavitation is caused, if the
A Fluid velocity decreases to zero
B Total energy decreases
C Both A and B
D Flow pressure approaches its vapor pressure at the prevailing temperature
The cavitation in a hydraulic machine is mainly due to
A low pressure
B high velocity
C high pressure
D low velocity
Causes of cavitation on chest x-ray are
A Granulomatosis with polyangitis
B Pulmonary infarction
C Pulmonary tuberculosis
D Fibrosingalveolitis
E Asbestosis
Cavitation in a centrifugal pump can be avoided by keeping the
A Inlet pressure high
B Outlet pressure low
C Inlet pressure low
D Outlet pressure high
Cavitation in a centrifugal pump results from
A High discharge pressure
B Low barometric pressure
C High discharge velocity
D High discharge rate
The cavitation in reaction turbines is avoided, to a great extent by
A Installing the turbine below the tail race level
B Using stainless steel runner of the turbine
C Providing highly polished blades to the runner
D All of the above
In order to avoid cavitation in centrifugal pumps
A The suction pressure should be high
B The delivery pressure should be high
C The suction pressure should be low
D The delivery pressure should be low
The cavitation in a hydraulic machine
A Causes noise and vibration of various parts
B Reduces the discharge of a turbine
C Causes sudden drop in power output and efficiency
D All of the above

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