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Engineering
Mechanical
ME Set-1
Hydraulics and fluid mechanics
106

Hydraulics and fluid mechanics MCQ with Answers

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

same as

less than

more than

none of these

Answer is:

more than

Hydraulics and fluid mechanics MCQ with Answers

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Related Hydraulics and fluid mechanics MCQ with Answers

107) If a body floating in a liquid occupies a new position and remains at rest in this new position, when given a small angular displacement, The body is said to be in __________ equilibrium.

neutral

stable

unstable

none of these

Answer is:

neutral

108) 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

Newton's law of motion

Newton's law of cooling

Newton's law of viscosity

Newton's law of resistance

Answer is:

Newton's law of resistance

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

1/2 depth

1/2 breadth

1/2 sloping side

1/4 (depth + breadth)

Answer is:

1/2 depth

110) A flow is called sub-sonic, if the Mach number is

less than unity

unity

between 1 and 6

more than 6

Answer is:

less than unity

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