# Fluid Mechanics and Hydraulics Machines (3141906) MCQ

### MCQs of Impact of Jet and Hydraulic Turbines

MCQ No - 1

#### The force exerted (in newton) by a jet of water impinging normally on a fixed plate is

(A) $\frac{\rho aV}{2}$
(B) $\rho aV$
(C) $\frac{\rho a{V}^{2}}{2}$
(D) $\rho a{V}^{2}$

D
MCQ No - 2

#### The force exerted by a jet of water (in a direction normal to flow) impinging on a fixed plate inclined at an angle θ with the jet is

(A) $\frac{\rho aV}{2}×\mathrm{sin}\theta$
(B) $\rho aV×\mathrm{sin}\theta$
(C) $\frac{\rho a{V}^{2}}{2}×\mathrm{sin}2\theta$
(D) $\rho a{V}^{2}×\mathrm{sin}\theta$

C
MCQ No - 3

#### The force exerted by a jet of water impinging normally on a plate which due to the impact of jet, moves in the direction of jet with velocity u is

(A) $\frac{\rho a\left(V-u\right)}{2}$
(B) $\rho a\left(V-u\right)$
(C) $\frac{\rho a{\left(V-u\right)}^{2}}{2}$
(D) $\rho a{\left(V-u\right)}^{2}$

D
MCQ No - 4

#### The ration of the normal force of a jet of water on a plane inclined at an angle of 30° as compared to that when the plate is normal to jet, is

(A) $\frac{1}{\sqrt{2}}$
(B) $\frac{1}{2}$
(C) $1$
(D) $\sqrt{2}$

B
MCQ No - 5

(A) one-half
(B) one-third
(C) two-third
(D) three-fourth

B