HYDRAULICS AND FLUID MECHANICS IN ME QUIZ

The viscosity of water is __________ than that of mercury.

Same as

Lower

Higher

None of these

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The specific weight of water is 1000 kg/m3

At normal pressure of 760 mm

At 4°C temperature

All of the listed here

At mean sea level

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The maximum thickness of boundary layer in a pipe of radius r is

r/2

r

2r

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The depth of the bucket for a Pelton wheel is generally _________ the diameter of jet.

1.8 times

1.2 times

Double

Equal to

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A rectangular block 2 m long, 1 m wide and 1 m deep floats in water, the depth of immersion being 0.5 m. If water weighs 10 kN/m3, then the weight of the block is

lOkN

20 kN

15 kN

5kN

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YOUR ANSWER : ?

A structure, whose width is __________ the width of the channel, is called a flumed structure.

None of these

Equal

Less than

More than

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The coefficient of viscosity may be determined by

Capillary tube method

All of these

Rotating cylinder method

Orifice type viscometer

TRUE ANSWER : ?
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In a single casing, multistage pump running at constant speed, the capacity rating is to be slightly lowered. It can be done by

Trimming the impeller size to the required size by machining

Some other alterations in the impeller

Not possible

Designing new impeller

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Center of pressure compared to e.g. is

Below it

Above it

At same point

Above or below depending on area of body

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High specific speed of a pump implies it is

Centrifugal pump

Axial flow pump

Any one of the above

Mixed flow pump

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