Pipe3 Flashcards
The ratio of the area of the wetted perimeter is known as ___
A. flow factor
B. hydraulic radius
C. Kutter’s C
D. value of K in Darcy-Weisbach formula
hydraulic radius
The extended Bernoulli equation includes all of the following terms except:
A. potential energy
B. kinetic energy
C. nuclear energy
D. friction losses
nuclear energy
The presence of a minor loss in the energy grade line will cause the line to slope:
A. down in the direction of the flow
B. upward in the direction of the flow
C. vertically downward
D. there is no effect of friction on the energy grade line
down in the direction of the flow
Hydrometer is used to find out
A. specific gravity of liquids
B. specific gravity of solids
C. specific gravity of gases
D. relative humidity
specific gravity of liquids
The presence of friction in the hydraulic grade will always cause the line to slope:
A. down in the direction of the flow
B. upward in the direction of the flow
C. level (no slope)
D. there is no effect of friction on the energy grade line
down in the direction of the flow
Bernoulli’s equation is a/an ____
A. momentum equation
B. conservation of energy equation
C. conservation of mass equation
D. equation of state
conservation of energy equation
Mass of density of liquid (rho) is given by which of the following?
A. rho = mass/volume
B. rho = metric slug/m^2
C. rho = kg-sec^2/m^4
D. all of the above
all of the above
McLeod gauge used for low pressure measurement operates on the principle of ___
A. Gas law
B. Boyle’s law
C. Charles law
D. Pascal’s law
Boyle’s law
The relationship between pressure and altitude in the atmosphere is given by the:
A. perfect gas law
B. conservation of mass
C. barometric height relationship
D. first law of thermodynamics
barometric height relationship
Which of the following turbine is different from the others?
A. Fourneyron turbine
B. Francis turbine
C. Kaplan turbine
D. Pelton wheel
Pelton wheel
The continuity equation of an ideal fluid flow:
A. states that the net rate of in - flow into any small volume must be zero
B. applies to irrotational flow only
C. states that the energy remains constant along streamline
D. states that energy is constant everywhere in the fluid
states that energy is constant everywhere in the fluid
The hydraulic grade line of a pipeline denotes which of the following?
A. Total energy
B. Pressure energy
C. Potential energy
D. The sum of pressure energy and potential energy
The sum of pressure energy and potential energy
The line of action of the buoyant forces always act through the centroid of the ___
A. submerged body
B. volume of the floating body
C. volume of the fluid vertically above the body
D. displaced volume of the fluid
displaced volume of the fluid
A pitot tube can be used to measure fluid velocity as described by the Bernoulli equation and the relationship between:
A. kinetic energy and static pressure
B. fluid pressure and static pressure
C. fluid pressure and impact energy
D. pressure and momentum
kinetic energy and static pressure
Permissible velocity of water flowing through concrete tunnel, is generally
A. 4 - 5 m/s
B. 10 - 12 m/s
C. 13 - 16 m/s
D. 20 m/s
4 - 5 m/s
The equation of continuity of flow is applicable if:
A. the flow is one dimensional
B. the flow is steady
C. the velocity is uniform over the cross-section
D. all of the above conditions are together
all of the above conditions are together
The speed of sound in all fluid is most closely related to all of the following properties except ___
A. compressibility
B. density
C. bulk modulus
D. thermal conductivity
thermal conductivity
The term subsonic flow refers to a flowing gas with a speed:
A. less than the local speed of sound
B. equal to the speed of sound
C. greater than the speed of sound
D. much greater than the speed of sound
less than the local speed of sound
Viscosity for a fluid is defined as the constant of proportionality between shear stress and what other variable?
A. the spatial derivative of velocity
B. the time derivative of pressure
C. the time derivative of density
D. the spatial derivative of density
the spatial derivative of velocity
Density in terms of viscosity is:
A. kinematic viscosity / dynamic viscosity
B. dynamic viscosity / kinematic viscosity
C. kinematic viscosity x dynamic viscosity
D. none of the above
dynamic viscosity / kinematic viscosity
The pitot tube is a device used for measurement of
A. pressure
B. flow
C. velocity
D. discharge
velocity
What is the use of Hydraulic jump?
A. increase the flow rate
B. reduce the flow rate
C. reduce the velocity of flow
D. reduce the energy of flow
reduce the energy of flow
Which of the following is not a characteristic of real fluids?
A. Finite viscosity
B. Non-uniform velocity distribution
C. Compressibility
D. Experience of eddy currents and turbulence
Experience of eddy currents and turbulence
Running away speed of a Pelton wheel gives:
A. actual operating speed
B. no load speed
C. full load speed
D. no load speed when governor mechanism fails
no load speed when governor mechanism fails
Neglecting the forces due to inertia, gravity and frictional resistance, the design of a channel can be made by comparing
A. Weber number
B. Reynolds numer
C. Froude’s number
D. Prant’l number
Froude’s number
An ideal fluid is one that:
A. is very viscous
B. obeys Newton’s law of viscosity
C. is assumed in problems in conduit flow
D. is frictionless and incompressible
is frictionless and incompressible
The most common method for calculating frictional energy loss for laminar flowing fluids in noncircular pipe is:
A. the Darcy equation
B. the Hagan - Poisevill equation
C. the Hazen - Williams equation
D. the Swamee - Jin equation
the Darcy equation
The time required for half a quantity of radioactive particles to decay (disintegrate) is called its _____
A. average life
B. median life
C. time constant
D. half time
half time
Where is vena contracta most likely located?
A. at the orifice
B. at a distance approximately 1/2 the diameter of the orifice
C. at a distance approximately equal to the diameter of the orifice
D. at a distance approximately twice the diameter of the orifice
at a distance approximately 1/2 the diameter of the orifice
Which of the following parameters determine the friction factor of turbulent flow in a rough pipe?
A. Froude number and relative roughness
B. Froude number and Mach number
C. Reynolds number and relative roughness
D. Mach number and relative roughness
Reynolds number and relative roughness
The continuity equation is applicable to:
A. viscous unviscous fluids
B. compressibility of fluids
C. conservation of mass
D. steady unsteady flow
conservation of mass
The pressure at a point in a fluid will not be same in all the directions if the fluid is:
A. viscous
B. viscous and static
C. inviscous and in motion
D. viscous and is in motion
viscous and is in motion
Weir refers to an opening
A. having closed perimeter and of regular form through which water flows
B. having prolonged sides with length of 2 to 3 diameters of opening in thick wall
C. having partially full flow
D. in hydraulic structure with regulation provision
having partially full flow
What do you call the lowest portion to storage basin from where the water is not drawn?
A. bottom storage
B. sub soil storage
C. spring reserve
D. dead storage
dead storage
Which of the following is NOT a characteristic of fluid pressure?
A. it is a shear stress
B. it is the same in all directions at a point in the fluid
C. it acts normal to a surface
D. it is linear with depth
it is a shear stress
Under which condition, the specific weight of water is 1000 kg/m^3?
A. at normal pressure of 760 mm
B. at 4C temperature
C. at mean sea level
D. all of the above
all of the above
Uniform flow takes place when:
A. condition remain unchanged with time at any point
B. rate of change of velocity of fluid is zero
C. at every point the velocity vector is identical in magnitude and direction fro any given instant
D. the change in transverse direction is zero
at every point the velocity vector is identical in magnitude and direction fro any given instant
Property of a fluid whereby its own molecules are attracted is known as ____
A. adhesion
B. cohesion
C. surface tension
D. viscosity
cohesion
All of the following can be characteristics of fluids except ___
A. kinematic viscosity
B. surface tension
C. bulk modulus
D. hysteresis
hysteresis
The flow on two sides of a normal shock wave is called ____
A. sonic
B. sub-sonic
C. supersonic
D. supersonic on one side and sub-sonic on the other side
supersonic on one side and sub-sonic on the other side