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Hydraulic and Fluid Machines - Interview Questions and Answers

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91. Dimensions of surface tension are
A. MlL�T2
B. MlL�Tx
C. MlL r2
D. MlL2T2
E. MlL�t.
Explanation:
92. For manometer, a better liquid combination is one having
A. higher surface tension
B. lower surface tension
C. surface tension is no criterion
D. high density and viscosity
E. low density and viscosity.
Explanation:
93. Increase in pressure at the outer edge of a drum of radius R due to rotation at corad/sec, full of liquid of density p will be
A. pco2/?2
B. pco2/?2/2
C. 2pa2R2
D. pa2R/2
E. none of the above.
Explanation:
94. If mercury in a barometer is replaced by water, the height of 3.75 cm of mercury will be following cm of water
A. 51 cm
B. 50 cm
C. 52 cm
D. 52.2 cm
E. 51.7 cm.
Explanation:
95. A liquid compressed in cylinder has a volume of 0.04 m3 at 50 kg/cm2 and a volume of 0.039 m3 at 150 kg/cm2. The bulk modulus of elasticity of liquid is
A. 400 kg/cm2
B. 4000 kg/cm2
C. 40 x 105 kg/cm2
D. 40 x 106 kg/cm2
E. none of the above.
Explanation:
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