# Hydraulics and Fluid Mechanics Quiz

Q1.The velocity corresponding to Reynold number of 2800, is called
A.sub-sonic velocity
B.super-sonic velocity
C.lower critical velocity
D.higher critical velocity

Q2.Whenever a plate is held immersed at some angle with the direction of flow of the liquid, it is subjected to some pressure. The component of this pressure, at right angles to the direction of flow of the liquid is known as lift.
A.True
B.False

Q3. A flow in which __________ force is dominating over the viscosity is called turbulent flow.
A.elastic
B.surface tension
C.viscous
D.inertia

Q4. If an in compressible liquid is continuously flowing through a pipe, the quantity of liquid passing per second is different at different sections.
A.True
B.False

Q5.When the pressure intensity at a point is less than the local atmospheric pressure, then the difference of these two pressures is called vacuum pressure.
A.Agree
B.Disagree

Q6. Reynold’s number is the ratio of inertia force to
A.pressure force
B.elastic force
C.gravity force
D.viscous force

Q7. Bulk modulus of a fluid __________ as the pressure increases.
A.remains same
B.decreases
C.increases

Q8.A water tank contains 1.3 m deep water. The pressure exerted by the water per metre length of the tank is
A.2.89 kN
B.8.29 kN
C.9.28 kN
D.28.9 kN

Q9.The depth of water in a channel corresponding to the minimum specific energy is known as critical depth.
A.Agree
B.Disagree

Q10.Which of the following statement is wrong?
A. A flow whose streamline is represented by a curve, is called two dimensional flow.
B.The total energy of a liquid particle is the sum of potential energy, kinetic energy and pressure energy.
C.The length of divergent portion in a venturimeter is equal to the convergent portion.
D.A pitot tube is used to measure the velocity of flow at the required point in a pipe.

Q11. An open tank containing liquid is made to move from rest with a uniform acceleration. The angle 0 which the free surface of liquid makes with the horizontal is such that (where a = Horizontal acceleration of the tank, and g = Acceleration due to gravity)
A.tan θ = a/g
B. tan θ = 2 a/g
C.tan θ = a/2g
D.tan θ = a2/2g