Casting of a centrifugal pump is designed so as to minimize________________?
(A) friction loss
(B) cavitation
(C) static head
(D) loss of kinetic energy
(D) starting time
High specific speed of turbine implies it is__________________?
(A) propeller turbine
(B) Francis turbine
(C) impulse turbine
(D) any one of the above
(D) none of the above
The maximum number of jets generally employed in impulse turbine without jet interference is________________?
(A) 4
(B) 6
(C) 8
(D) 12
(D) 16.
Any change in load is adjusted by adjusting following parameter on turbine______________?
(A) net head
(B) absolute velocity
(C) blade velocity
(D) flow
(D) relative velocity of flow at inlet
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
(D) as square root of density
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
(D) none of the above
According to fan laws, at constant weight of air or gas, the speed, capacity and pressure 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
(D) as square root of density
A hydraulic accumulator normally consists of________________?
(A) two cylinders, two rams and a storage device
(B) a cylinder and a ram
(C) two co-axial rams and two cylinders
(D) a cylinder, a piston, storage tank and control valve
(D) special type of pump with storage device and a pressure regulator
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%
(D) 91.6%.
Puck up the wrong statement about centrifugal pump_______________?
(A) discharge a diameter
(B) head a speed2
(C) head a diameter
(D) Power a speed3
(D) none of the above is wrong