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.Management Sciences
Category: Hydraulic Machines
High specific speed of turbine implies it is__________________?
A. propeller turbine
B. Francis turbine
C. impulse turbine
D. any one of the above
E. none of the above
Indicator diagram of a reciprocating pump is a graph between________________?
A. flow vs swept volume
B. pressure in cylinder vs swept volume
C. flow vs speed
D. pressure vs speed
E. swept volume vs speed
Saving of work done and power by fitting an air vessel to double acting reciprocating pump is of the order of_______________?
A. 39.2%
B. 49.2%
C. 68.8%
D. 84.8%
E. 91.6%.
Medium specific speed of a pump implies it is_________________?
A. centrifugal pump
B. mixed flow pump
C. axial flow pump
D. any one of the above
E. none of the above
Head developed by a centrifugal pump depends on___________________?
A. impeller diameter
B. speed
C. fluid density
D. type of casing
E. A. and B. above
According to fan laws, at constant pressure, the speed capacity and power vary_________________?
A. directly as the air or gas density
B. inversely as square root of density
C. inversely as density
D. as square of density
E. as square root of density
Multistage centrifugal pumps are used to obtain___________________?
A. high discharge
B. high head
C. pumping of viscous fluids
D. high head and high discharge
E. high efficiency
Runaway speed of a hydraulic turbine is_________________?
A. full load speed
B. the speed at which turbine runner will be damaged
C. the speed if the turbine runner is allowed to revolve freely without load and with the wicket gates wide open
D. the speed corresponding to maximum overload permissible
E. none of the above.
According to fan laws, for the fans having constant wheel diameters, the power demand varies_______________?
A. directly as fan speed
B. square of fan speed
C. cube of fan speed
D. square root of fan speed
E. none of the above
Axial flow pump is started with its delivery valve________________?
A. kept fully closed
B. kept fully open
C. irrespective of any position
D. kept 50% open
E. none of the above
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