Fluid Mechanics - Study Mode

Show All Answers

[#171] The terminal velocity of a particle moving through a fluid varies as d p n . What is the value of 'n' for Newton's law regime?

(A) 0.5

(B) 1

(C) 1.5

(D) 3

Correct Answer

(A) 0.5

[#172] Absolute viscosity of a fluid is a function of the __________ of the fluid.

(A) Motion

(B) Pressure & temperature

(C) Shearing stress

(D) Both B & C

Correct Answer

(D) Both B & C

[#173] A free jet of water of cross-sectional area 0.01 m 2 and a velocity of 20 m/s strikes a plate and then flows in a plane parallel to the plate as shown in the figure below. The horizontal component of the force on the support is

(A) 200 N

(B) 400 N

(C) 2000 N

(D) 4000 N

Correct Answer

(D) 4000 N

[#174] Which of the following relationship is valid for the equilibrium position of the float in a rotameter? (where, D f = Drag force on the float B f = Buoyant force on the float W f = Weight of the float)

(A) D f + B f = W f

(B) D f = B f + W f

(C) D f + B f + W f = 0

(D) None of these

Correct Answer

(A) D f + B f = W f

[#175] With increasing flow rate, the hydraulic efficiency of a centrifugal pump

(A) Monotonically decreases

(B) Decreases and then increases

(C) Remains constant

(D) Increases and then decreases

Correct Answer

(A) Monotonically decreases