1000+ Fluid Mechanics & Hydraulics Questions and Answers Pdf - 1

Question: 1

A Newtonian fluid is defined as the fluid which

(A) obeys Newton's law of viscosity

(B) is incompressible and viscous

(C) is compressible and non viscous

(D) is highly viscous

Ans: A

obeys Newton's law of viscosity

Question: 2

Gauge pressure is

(A) absolute pressure – local atmospheric pressure

(B) absolute pressure + local atmospheric pressure

(C) pressure measured above complete vacuum

(D) none of the above

Ans: A

absolute pressure – local atmospheric pressure

Question: 3

Maximum loss of head in flow through pipe is due to

(A) an outlet

(B) friction

(C) sudden contraction

(D) sudden enlargement

Ans: B

friction

Question: 4

The viscosity of a gas

(A) is independent of pressure for very high pressure intensities

(B) is independent of temperature

(C) increases with increase in temperature

(D) decreases with increase in temperature

Ans: C

increases with increase in temperature

Question: 5

The motion of air mass in a tornado is a

(A) forced vortex at centre and free vortex outside

(B) free vortex at centre and forced vortex outside

(C) forced vortex motion

(D) free vortex motion

Ans: A

forced vortex at centre and free vortex outside

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