Engineering Fluid Mechanics: Practice Problems with Solutions pdf - Set 35 - ObjectiveBooks
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# Practice Test: Question Set - 35

1. Pascal's law is valid, only when the fluid is
(A) Frictionless and at rest
(B) At rest
(C) At rest and when the frictionless fluid is in motion
(D) None of these

2. Co-efficient of velocity is __________ the coefficient of discharge.
(A) Less than
(B) More than
(C) Equal to
(D) Not related to

3. Theoretical head developed by a centrifugal pump does not depend upon the __________ the impeller.
(B) Speed of
(C) Fluid velocity leaving
(D) None of these

4. The inherent characteristic of an equal percentage valve relating flow rate 'q' with valve stem movement 'x' are described by the equation
(A) dq/dx = K
(B) dq/dx = K.q
(C) dq/dx = K/q
(D) dq/dx = Kq2

5. The dimension of kinematic viscosity is
(A) ML-2T-1
(B) L2T-1
(C) ML-2T-2
(D) None of these

6. The terminal velocity of a particle moving through a fluid varies as dpn. What is the value of n' for Newton's law regime?
(A) 0.5
(B) 1
(C) 1.5
(D) 3

7. Drag force acting on a body does not depend upon the
(A) Density of the fluid
(B) Density of the body
(C) Velocity of the body
(D) Projected area of the body

8. Fluidized beds are formed, when the
(A) Fluid friction is zero
(B) Gravity force is less than the fluid friction
(C) Pressure forces equal gravity forces
(D) Sum of the fluid friction and pressure forces is equal and opposite to gravity forces

9. N2Re/NFr is called the __________ number.
(A) Brinkman
(B) Galileo
(C) Archimedes
(D) Euler

10. Which of the following is not concerned with the fluid-particle interaction?
(A) Drag co-efficient
(B) Froude number
(C) Galileo number
(D) Weber number

11. Centre of pressure in an immersed body is __________ the centre of gravity.
(A) Above
(B) Below
(C) At
(D) Either above or below; depends on the liquid density

12. The __________ is measured by a piezometric opening.
(A) Dynamic pressure
(B) Static pressure
(C) Total pressure
(D) Point velocity

13. The phenomenon occurring during pumping of a liquid solution containing dissolved gases, which may come out of the solution giving rise to gas pockets, is termed as
(A) Evaporation
(B) Cavitation
(C) Sublimation
(D) Stripping

14. What is the normal range of exit cone angle of a Venturimeter?
(A) 2 to 5
(B) 7 to 15
(C) 15 to 25
(D) > 25

15. Centrifugal pump is normally classified on the basis of the
(A) rpm
(B) Type of casing