Mechanical Engineering · all questions

Hydraulics And Fluid Mechanics
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Q141

Pressure of the order of 10" torr can be measured by

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Q142

The most economical section of a trapezoidal channel is one which has hydraulic mean depth equal to

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Q143

The pressure of liquid at throat in a Venturimeter is __________ than that at inlet.

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Q144

A bucket of water is hanging from a spring balance. An iron piece is suspended into water without touching sides of bucket from another support. The spring balance reading will

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Q145

Fluid is a substance which offers no resistance to change of

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Q146

According to fan laws, at constant weight of air or gas, the speed, capacity and pressure vary

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Q147

For centrifugal pump impeller, the maximum value of the vane exit angle is

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Q148

A hemispherical tank of radius (R) has an orifice of cross-sectional area (a) at its bottom and is full of liquid. The time required to empty the tank completely is

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Q149

Choose the wrong statement. Alcohol is used in manometer, because

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Q150

Alcohol is used in manometers because

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Q151

Two pipe systems can be said to be equivalent, when the following quantities are same

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Q152

At the center line of a pipe flowing under pressure where the velocity gradient is zero, the shear stress will be

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Q153

If the ratio's of the corresponding forces acting at corresponding points are equal, then the model and the prototype are said to have.

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Q154

The discharge through a reaction turbine with increase in unit speed

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Q155

The specific speed of a centrifugal pump, delivering 750 liters of water per second against a head of 15 meters at 725 r.p.m., is

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Q156

The specific weight of sea water is __________ that of pure water.

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Q157

When a body is immersed wholly or partially in a liquid, it is lifted up by a force equal to the weight of liquid displaced by the body. This statement is called

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Q158

For a perfect incompressible liquid, flowing in a continuous stream, the total energy of a particle remains the same, while the particle moves from one point to another. This statement is called

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Q159

The force exerted by a moving fluid on an immersed body is directly proportional to the rate of change of momentum due to the presence of the body. This statement is called

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Q160

A moving fluid mass may be brought to a static equilibrium position, by applying an imaginary inertia force of the same magnitude as that of the accelerating force but in the opposite direction. This statement is called

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