Air flows through a duct, and the Pitot-static tube measuring the velo – McqOptions

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1.	Air flows through a duct, and the Pitot-static tube measuring the velocity is attached to a differential manometer containing water. If the deflection of the manometer is 100 mm, assuming the density of air is constant and equals to 1.22 kg/m3, and that the coefficient of the tube is 0.98. The air velocity will be.
A.	0.393 m/s
B.	4.07 m/s
C.	3.93 m/s
D.	39.3 m/s
Answer» E.

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Air flows through a duct, and the Pitot-static tube measuring the velocity is attached to a differential manometer containing water. If the deflection of the manometer is 100 mm, assuming the density of air is constant and equals to 1.22 kg/m3, and that the coefficient of the tube is 0.98. The air velocity will be.