Related Questions

Consider a centrifugal pump having a specific impeller diameter, fixed impeller speed pumping a liquid of constant density at a particular discharge capacity. With decrease in the capacity of the pump, the __________ decreases.
A NPSH required
B BHP required by the pump
C Head of the liquid pumped
D All of the above
Height of liquid in agitation tank is normally maintained equal to the tank diameter. However, if the tank is too tall and a large liquid hold up is desired, then two or more impellers mounted on the same shaft may be used. The clearance between the tank bottom and the bottom most impeller should be about (where, D = impeller diameter)
A 0.5 D
B D
C 1.5 D
D 2 D
The blades of a centrifugal impeller are said to be curved forward, if the __________ of the motion of impeller blades.
A Inlet tip of a blade curves in a direction opposite to that
B Outlet tip of a blade curves in a direction opposite to that
C Inlet tip of a blade is towards the direction
D Outlet tip of a blade is towards the direction
The specific speed of a turbine is the speed of an imaginary turbine, identical with the given turbine, which
A Delivers unit discharge under unit head
B Delivers unit discharge under unit speed
C Develops unit power under unit head
D Develops unit power under unit speed
The pump impeller and the turbine runner in a hydraulic torque converter
A Have the same diameter
B Have different diameters
C Are directly coupled
D None of these
For turbine agitator, the impeller diameter is about
A 0.3 to 0.5 d
B 0.1 to 0.2 d
C 0.65 to 0.85 d
D 0.95 d
which of the following components of reaction turbine increases the head on the turbine by an amount equal to the height of runner outlet above the tail race ?
A Scroll casing
B Guide vanes
C Draft tube
D Moving vanes
Which energy generated in a turbine is used to run electric power generator linked to the turbine shaft?
A mechanic energy
B kinetic energy
C potential energy
D elastic energy
Which type of turbine is a Francis Turbine?
A Impulse Turbine
B Screw Turbine
C Reaction turbine
D Turgo turbine
The pressure ratio for an open cycle gas turbine compared to closed cycle gas turbine of same h.p. is
A Low
B High
C Same
D Low/high depending on make and type

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