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.Management Sciences
Category: Hydraulic Machines
High 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
According to fan laws, for fans having constant wheel diameter, the pressure 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
Motion of a liquid in a volute casing of a centrifugal pump is an example of____________________?
A. rotational flow
B. radial
C. forced spiral vortex flow
D. forced cylindrical vortex flow
E. spiral vortex flow
Air vessels in reciprocating pump are used to__________________?
A. smoothen flow
B. reduce acceleration to minimum
C. increase pump efficiency
D. save pump from cavitation
E. increase pump head
The flow rate in gear pump___________________?
A. increases with increase in pressure
B. decreases with increase in pressure
C. more or less remains constant with in-crease in pressure
D. unpredictable
E. none of the above
For small discharge at high pressure, following pump is preferred_____________________?
A. centrifugal
B. axial flow
C. mixed flow
D. propeller
E. reciprocating
Low 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
In reaction turbine, draft tube is used_____________________?
A. to transport water downstream without eddies
B. to convert the kinetic energy to flow energy by a gradual expansion of the flow cross-section
C. for safety of turbine
D. to increase flow rate
E. none of the above
A turbine pump is basically a centrifugal pump equipped additionally with_________________?
A. adjustable blades
B. backward curved blades
C. vaned diffusion casing
D. inlet guide blades
E. totally submerged operation facility
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