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Multiple Choice Question & Answer

YB WEB DESK. Dated: 2/27/2021 11:34:09 AM

Objective Type Questions on Fluid Mechanics
1-A Differential manometer measures
(A) difference in pressure between two points
(B) difference in total energy between two points
(C) local atmospheric pressure
(D) absolute pressure at a point
2-The condition of ‘No slip’ at rigid boundaries is applicable to
flow of
(A) all non-Newtonian fluids
(B) all real fluids
(C) ideal fluids only
(D) Newtonian fluids only
3-Pitot tube is used for measurement of
(A) discharge
(B) velocity at a point
(C) flow of ideal fluids only
(D) low pressures
4-The frictional resistance of a pipe varies approximately with
the ___ of the liquid.
(A) cube of velocity
(B) square of velocity
(C) velocity
(D) pressure
5-The lift force on a body is
(A) due to drag on the body
(B) the component of the resultant force in a direction normal to
relative velocity
(C) the component of the resultant force in the vertical direction
(D) due to buoyant force
6-For subsonic flow, if the area of flow increases
(A) velocity is infinity
(B) velocity decreases
(C) velocity increases
(D) velocity is constant
7-The difference between the total head line and the hydraulic
grade line represents
(A) the elevation head
(B) the pressure head
(C) the piezometric head
(D) the velocity head
8-The equation of motion for laminar flow of a real fluid is
known as
(A) Reynold’s equation
(B) Navier-Strokes equation
(C) Bernoulli’s equation
(D) Euler ’s equation
9-The following is not a dimension-less number
(A) Coefficient of Velocity (CV)
(B) Manning’s coefficient (n)
(C) Coefficient of drag (CD)
(D) Darcy-Weisbach friction factor (f)
10-The notch angle for maximum discharge over a triangular
notch is
(A) 90°C
(B) 75°C
(C) 60°C
(D) 45°C
11-The dimensions for Kinematic Viscosity is
(A) M L-2 T
(B) M L-1 T-1
(C) L2 T-2
(D) L2 T-1
12-Square root of the ratio of inertia force of flowing fluid to the
gravity force is
(A) Euler ’s number
(B) Froude’s number
(C) Weber number
(D) Mach number
13-A hyetograph is a plot of
(A) Discharge Vs Time
(B) Rainfall depth Vs duration
(C) Rainfall intensity Vs Time
(D) Cumulative rainfall Vs Time
ANSWERS:
1-(A), 2-(B), 3-(B), 4-(B), 5-(B), 6-(B), 7-(D), 8-(B), 9-(B), 10-
(A), 11-(D), 12-(C), 13-(C)