Hydraulics And Fluid Mechanics In Me - Study Mode

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[#86] Surface energy per unit area of a surface is numerically equal to

(A) Atmospheric pressure

(B) Surface tension

(C) Force of adhesion

(D) Force of cohesion

Correct Answer

(B) Surface tension

[#87] The coefficient of discharge in case of internal mouthpiece is __________ that of external mouthpiece.

(A) Less than

(B) More than

(C) Equal to

(D) None of these

Correct Answer

(A) Less than

[#88] In a footstep bearing, if the speed of the shaft is doubled, then the torque required to overcome the viscous resistance will be

(A) Double

(B) Four times

(C) Eight times

(D) Sixteen times

Correct Answer

(A) Double

[#89] In a footstep bearing, if the radius of the shaft is doubled, then the torque required to overcome the viscous resistance will be

(A) Double

(B) Four times

(C) Eight times

(D) Sixteen times

Correct Answer

(D) Sixteen times

[#90] To avoid an interruption in the flow of a siphon, an air vessel is provided

(A) At the inlet

(B) At the outlet

(C) At the summit

(D) At any point between inlet and outlet

Correct Answer

(C) At the summit