Fluid Mechanics Handout (Objectives) Flashcards
This principle states that “Where the velocity of a fluid is high, the pressure is low, and where the velocity is low, the pressure is high”.
A. Archimedes Principle
B. Torricelli’s Theorem
C. Flow Principle
D. Bernoulli’s Principle
Bernoulli’s Principle
Archimedes is for forces by fluids
Torricellism’s theorem is HOLES
Which of the following is the basis for Bernoulli’s law of fluid flow?
A. principle of conservation of mass
B. principle of conservation of energy
C. continuity equation
D. Colebrook equation
principle of conservation of energy
Which law that for a confined fluid, the pressure at a point has the same magnitude in all directions?
A. Pascal’s law
B. Bernoulli’s Theorem
C. Avogadro’s Law
D. Amagat law
Pascal’s law
Avogadro’s law is for equal PVT
Amagat Law is for partial volume
What is the principle works in the hydraulic brakes of an automobiles?
A. Bernoulli’s law
B. Pascal’s law
C. Archimede’s principles
D. Posieuille’s Law
Pascal’s law
Posieuille’s Law is for narrow tubes
What is a device used to determine the specific gravity of the liquids?
A. Psychrometer
B. hydrometer
C. manometer
D. venturi meter
hydrometer
Psychrometer is for humidity
Manometer is for pressure
Venturi is for fluid flow
Commercially used pressure measuring device today is
A. Manometer
B. Kelvin gauge
C. Barometer
D. Bourdon Tube Gauge
Bourdon Tube Gauge
Kelvin gauge is for absolute temp
Barometer is for atmospheric temp
What is force per unit area?
A. work
B. energy
C. pressure
D. power
pressure
What can you say about the following statement regarding centrifugal pumps? “The discharge of the centrifugal pumps can be throttled without the building up of an excessive pressure or overloading its driving unit.”
I. True
II. False
A. Either I or II
B. Both I and II
C. II
D. I
I
Which of the following is TRUE for a propeller-type impeller centrifugal pump?
A. The head developed is due to the push of the vanes and flow is almost entirely axial
B. The head developed cannot be determined by the rotation of the vanes
C. The head developed is due to the rotation of the impeller
D. The head developed is due to the action of centrifugal force
The head developed is due to the push of the vanes and flow is almost entirely axial
Which of the following statements is FALSE?
A. Steady flows do not change with time at any point.
B. The Navier-Stokes equation is the equation of motion for a viscous Newtonian fluid.
C. Bernoulli’s equation only holds on the same streamline.
D. The Reynolds number is the ratio of the viscous force to the inertial force.
The Reynolds number is the ratio of the viscous force to the inertial force.
What can you say about the following statement regarding centrifugal pumps? “The discharge of the centrifugal pumps can be throttled without the building up of an excessive pressure or overloading its driving unit.”
I. True
II. False
III. Either True or False
IV. True for reciprocating pumps
A. II
B. I
C. III
D. IV
I
A leak from a faucet comes out in separate drops. Which of the following is the main cause of this phenomenon?
A. air resistance
B. gravity
C. viscosity of the fluid
D. surface tension
surface tension
Which of the following is TRUE for fluid?
A. It has a very regular molecular structure
B. It cannot sustain a shear force in motion.
C. It cannot sustain a shear force at rest.
D. It is liquid only.
It cannot sustain a shear force at rest.
If the shear stress in a fluid varies linearly with the velocity gradient, which of the following describes the fluid?
A. It is a perfect gas.
B. It is at constant temperature
C. It is inviscid
D. It is a Newtonian Fluid
It is a Newtonian Fluid
Which of the following describes shear stress in a moving fluid?
A. It is proportional to the absolute viscosity
B. It is proportional to the velocity gradient at the point of interest.
C. It is proportional to the fluid velocity
D. both A and B
both A and B
A force causing a rise in liquid in tubes of small diameter.
A. Cohesion
B. Surface tension
C. Capillarity
D. Adhesion
Capillarity
What is the absolute velocity of a real fluid at a surface?
A. the same as the bulk fluid velocity
B. the velocity of the surface
C. proportional to the smoothness of the surface
D. proportional to the kinematic viscosity of the fluid
the velocity of the surface
What is the unique state at which solid, liquid, and gaseous phase can coexist in equilibrium?
A. Critical point
B. Laminar point
C. Triple Point
D. Boiling Point
Triple Point
Under what conditions is mass conserved in fluid flow?
A. The fluid is baratropic
B. The flow is isentropic
C. The flow is adiabatic
D. It is always conserved
It is always conserved
Measuring device for atmospheric presure
barometer
