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.Management Sciences
Category: Hydraulic Machines
A hydraulic intensifier 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
E. special type of pump with storage device and a pressure regulator
The angle of taper on draft tube is A. greater than 15° B. greater than 8° C. greater than 5° D. less than 8° E. less than 3°.___________________?
The angle of taper on draft tube is
A. greater than 15°
B. greater than 8°
C. greater than 5°
D. less than 8°
E. less than 3°.
Francis turbine is best suited for_____________________?
A. medium head application from 24 to 180 m
B. low head installation up to 30 m
C. high head installation above 180 m
D. all types of heads
E. none of the above
In a centrifugal pump casing, the flow of water leaving the_______________?
A. radial
B. radial
C. centrifugal
D. rectilinear
E. vortex
Low 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 air or gas capacity 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
Pressure intensifier increases the pressure in proportion to____________________?
A. ratio of diameters
B. square of ratio of diameters
C. inverse ratio of diameters
D. square of inverse ratio of diameters
E. fourth power of ratio of diameters
For starting an axial flow pump, its delivery valve should be____________________?
A. closed
B. open
C. depends on starting condition and flow desired
D. could be either open or closed
E. partly open and partly closed
Medium specific speea 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
One horsepower is equal to_________________?
A. 102 watts
B. 75 watts
C. 550 watts
D. 736 watts
E. 33000 watts
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