At a rated capacity of 44 Cumecs, a centrifugal pump develops 36 m of head when

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Question
At a rated capacity of 44 Cumecs, a centrifugal pump develops 36 m of head when operating at 1450 rpm. Its specific speed is :
Options
A. 654
B. 509
C. 700
D. 90

Correct Answer

654

GATE Exam Questions problems

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1. The basic assumption of plane sections normal to the neutral axis before bending, remaining plane and normal to the neutral axis after bending, leads to :
Options
A. uniform strain over the beam cross section
B. uniform stress over the cross section
C. linearly varying strain over the cross section
D. stresses which are proportional to strains at all cross sections

2. Negative skin friction occurs when :
Options
A. an upward drag exists in the pile
B. the surrounding soil settles more than the pile
C. the pile passes continuously through a firm soil
D. the driving operation begins

6. A direct shear test was conducted on a cohesionless soil (c = 0) specimen under a normal stress of 200 kN/m². The specimen failed at a shear stress of 100 kN/m². The angle of internal friction of the soil (degrees) is
Options
A. 26.6
B. 29.5
C. 30.0
D. 32.6

7. Both Reynolds and Froude numbers assume significance in one of following examples :
Options
A. Motion of submarine at large depths
B. Motion of ship in deep seas
C. Cruising of a missile in air
D. Flow over spillways

8. The repeating variables in dimensional analysis should :
Options
A. include the dependent variable
B. have amongst themselves all the basic dimensions
C. be derivable from one another
D. exclude one of the basic dimensions

10. A body moving through still water at 6 m/sec produces a water velocity of 4 m/sec at a point 1 m ahead. The difference in pressure between the nose and the point 1 m ahead would be
Options
A. 2, 000 N/m²
B. 10, 000 N/m²
C. 19, 620 N/m²
D. 98, 100 N/m²

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