Pipe1 Flashcards by JM Park

Flows through multi - loop systems may be computed by:

a. ) any closed - form solution of simultaneous equations
b. ) the Hardy-Cross method
c. ) trial and error
d. ) all of the above

all of the above

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What is the pressure at the exit of a draft tube in a turbine?

a. ) below atmospheric
b. ) vacuum
c. ) atmospheric
d. ) gage

Atmospheric

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Which of the following is not a similarity between a submerged culvert and a siphon?

a. ) they both operate full
b. ) Torricelli’s equation holds
c. ) Both can experience entrance and exit losses
d. ) In both, the water flows downhill

Torricelli’s equation holds

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The volume flow passes through a venturimeter is:

a. ) increasing
b. ) decreasing
c. ) constant
d. ) varying

Constant

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The matching of scale model and full-scale results for a fluid dynamic phenomena involving compressible fluids requires equality of:

a. ) Reynolds number
b. ) Froude number
c. ) Cauchy number
d. ) Mach number

Mach number

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The fact that a fluid’s velocity increases as the cross sectional area of the pipe through which it flow decreases due to:

a. ) Bernoulli’s equation
b. ) The continuity equation
c. ) The momentum equation
d. ) The perfect gas law

The continuity equation

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Once could expect the possibility of Froude number similarity in all of the following cases except:

a. ) Surface ships
b. ) Surface wave motion
c. ) Flow over weirs
d. ) Closed-pipe turbulent pipe flow

Closed-pipe turbulent pipe flow

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One could expect the possibility of Froude number similarity in all of the following cases except:

a. ) motion of a fluid jet
b. ) flow over spillways
c. ) surge and flood waves
d. ) subsonic airfoils

Subsonic airfoils

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One could expect the possibility of Reynolds number similarity in all of the following cases except:

a. ) pumps
b. ) fans
c. ) turbines
d. ) weirs

Weirs

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Flow measuring devices include all of the following except:

a. ) flow nozzles
b. ) venture area meters
c. ) pitot tubes
d. ) precision tachometer

Precision tachometers

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The following are examples indirect (secondary) measurements to measure flow rates using obstruction meters except:

a. ) pitot static meters
b. ) static pressure probes
c. ) weight and mass scales
d. ) direction - sensing probes

Weight and mass scales

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The lowest portion to storage basing from where the water is not drawn is:

a. ) bottom storage
b. ) sub-soil storage
c. ) spring reserve
d. ) dead storage

Dead storage

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In turbine installation, the air is removed from the condenser by:

a. ) air pump
b. ) air injector
c. ) air ejector
d. ) air compressor

Air Ejector

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A type of water turbine where a jet of water is made to fall on the blades or buckets and due to the impulse of water, the turbine starts to move

a. ) Pelton wheel
b. ) Steam turbine
c. ) Francis turbine
d. ) Reaction turbine

Pelton wheel

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An impulse turbine are used for:

a. ) low head
b. ) medium head
c. ) high head
d. ) very low head

High Head

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In a hydro-electric plant using a Francis turbine with medium head, the speed can be regulated using the:

a. ) deflector gage
b. ) nozzle
c. ) wicket gate
d. ) weir

Wicket gate

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Venturi meters, pitot static gauges, orifice meters, flow nozzles, and differential manometers all depend upon the relationship between:

a. ) flow velocity and friction
b. ) flow velocity and pressure
c. ) friction and pressure
d. ) pressure and mass flow

Flow velocity and pressure

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Flow measuring devices include all of the following except:

a. ) orifice plate meters
b. ) hot-wire anemometers
c. ) magnetic flow meters
d. ) mercury barometer

Mercury barometer

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The water hammer phenomenon is primarily what kind of fluid mechanics?

a. ) Static (a phenomena independent of time)
b. ) Dynamic (a time-dependent phenomena)
c. ) Compressible
d. ) Incompressible

Dynamic (a time-dependent phenomena)

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In series pipe systems, all of the following parameters vary from section to section except:

a. ) pressure drop
b. ) friction loss
c. ) head loss
d. ) mass flow

Mass flow

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All of the following are forms of drag on a body moving through a fluid except:

a. ) skin friction
b. ) wake drag
c. ) profile drag
d. ) d’ Alembert’s paradox drag

d’ Alembert’s paradox drag

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In the absence of any heat and work interactions and and changes in potential energy, the stagnation enthalpy of a fluid remains constant during:

a. ) unsteady flow
b. ) steady flow
c. ) turbulent flow
d. ) variable flow

Steady flow

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Flow measuring devices include all of the following except:

a. ) venturi meters
b. ) static pressure probes
c. ) turbine and propeller meters
d. ) magnetic dynamometers

Magnetic dynamometers

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Once could expect the possibility of Reynolds number similarity in all of the following cases except:

a. ) pumps
b. ) fans
c. ) trubines
d. ) weirs

Weirs

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Expansion factors take into account the: a. ) area of the vena contracta b. ) small effect of friction and turbulence of the orifice c. ) changes in diameters of a converging pipe d. ) effects of compressibility

Effects of compressibility

A vena contracta in a fluid jet issuing through a hole in a plate is located approximately: a. ) 10 diameters downstream of the hole b. ) at jet's minimum diameter c. ) at the orifice minimum diameter d. ) at the orifice maximum diameter

At jet's minimum diameter

In the deep well installation or operation, the difference between static water level and operating water level is known as ___ a. ) suction lift b. ) drawdown c. ) priming level d. ) clogging

Drawdown

The primary purpose of a turbine in a fluid loop is to: a. ) add energy to the flow b. ) add mass to the flow c. ) extract energy from the flow d. ) none of the above

Extract energy from the flow

The coefficient of discharge is the ratio of the: a. ) area of vena contracta to the orifice area b. ) actual discharge to the theoretical discharge c. ) actual velocity to the theoretical velocity d. ) effective head to the actual head

Actual discharge to the theoretical discharge

All of the following fluid phenomena are based on the force momentum principle of a flowing fluid except: a. ) turbines b. ) Pelton wheels c. ) Diesel automobile engines d. ) jet engines

Diesel automobile engines

The lowest portion to storage basin from where the water is not drawn is: a. ) bottom storage b. ) sub-soil storage c. ) spring reserve d. ) dead storage

Dead storage

The following are all examples of indirect (secondary) miscellaneous methods to measure flow except: a. ) turbine and propeller meters b. ) pitot static meters c. ) positive displacement meters d. ) magnetic flow meters

Positive displacement meters

The magnitude of the drag coefficient of a sphere in water is dependent upon all of the following except: a. ) fluid density b. ) fluid viscosity c. ) units of measure (SI or English Engineering System) d. ) drag force

Units of measure (SI or English Engineering System)

A draft tube is a part of which power plants? a. ) Diesel engine power plant b. ) Gas turbine power plant c. ) Steam power plant d. ) Hydro-electric power plant

Hydro-electric power plant

Flows through multi-loop system may be computed by: a. ) any closed-form solution of simultaneous equations b. ) the Hardy-Cross method c. ) trial and error d. ) all of the above

All of the above

The coefficient of discharge is the ratio of the a. ) area of vena contracta to the orifice area b. ) actual discharge to the theoretical discharge c. ) actual velocity to the theoretical velocity d. ) effective head to the actual head

Actual discharge to the theoretical discharge

Hydraulic jump is used to: 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

What is the use of a 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

Pitot tube is use to measure the: a. ) velocity of mass b. ) velocity of pipe c. ) flow d. ) velocity of flow

Velocity of flow

In a hydro-electric plant using a Francis turbine with medium head, the speed can be regulated using the: a. ) deflector gage b. ) nozzle c. ) wicket gate d. ) weir

Wicket gate

The following are examples of indirect (secondary) measurements to measure flow rates using obstruction meters except: a. ) variable area meters b. ) venture meters c. ) volume tanks d. ) flow nozzles

Volume tanks

An impulse turbine has: a. ) low head b. ) medium head c. ) high head d. ) very low head

High head

A Kaplan turbine is: a. ) a high head mixed flow turbine b. ) an inward flow impulse turbine c. ) an outward flow reaction turbine d. ) low head axial flow turbine

Low head axial flow turbine

At jet's minimum diameter

Actual discharge to the theoretical discharge

Which of the following is a characteristic of an impulse turbine? a. ) Steam striking blades on angle b. ) No steam reaction to velocity c. ) Steam striking blades at zero angle d. ) Steam reversing direction

Steam striking blades at zero angle

In parallel pipe system originating and terminating in common junctions: a. ) mass flows through each branch are equal b. ) pressure drops through each branch are equal c. ) lengths of each branch are equal d. ) flow areas of each branch are equal

Pressure drops through each branch are equal

One could expect the possibility of Froude number similarity in all of the following cases except: a. ) surface ships b. ) surface wave motion c. ) flow over weirs d. ) closed-pipe turbulent pipe flow

Closed-pipe turbulent pipe flow

Which of the following is not a similarity between a submerged culvert and a siphon? a. ) They both operate full b. ) Torricelli's equation holds c. ) Both can experience entrance and exit losses d. ) In both, the water flows downhill

Torricelli's equation holds

When a falling object reaches a speed at which the drag force equals its weight, it has achieved: a. ) Mach one b. ) a laminar boundary layer c. ) a turbulent boundary layer d. ) terminal velocity

A turbulent boundary layer

In turbine installation, the air is removed from the condenser by __ a. ) air pump b. ) air injector c. ) air ejector d. ) air jet

Air Ejector

The following are examples indirect (secondary) measurements to measure flow rates using obstruction meters except: a. ) pitot static meters b. ) static pressure probes c. ) weight and mass scales d. ) direction - sensing probes

Weight and mass scales

High head turbine is a/an: a. ) Impulse b. ) Francis c. ) Reaction d. ) Propeller

Impulse

Which of the following is a type of water turbine? a. ) Parson b. ) Hero c. ) Pelton d. ) Bankl

Pelton

Pressure drops through each branch are equal

The primary purpose of a turbine in a fluid loop is to: a. ) add energy to the flow b. ) add mass to the flow c. ) extract energy from the flow d. ) none of the above

Extract energy from the flow

In a hydro-electric plant using a Francis turbine with medium head, the speed can be regulated using the: a. ) deflector gage b. ) nozzle c. ) wicket gate d. ) weir

Wicket gate

The matching of scale model and full-scale prototype results for a fluid dynamic phenomena involving a fully submerged body requires equality of: a. ) Reynolds number b. ) Weber number c. ) Froude number d. ) Mach numer

Reynolds number

In the deep well installation or operation, the difference between static water level and operating water level is called __ a. ) suction b. ) drawdown c. ) priming level d. ) clogging

Drawdown

In fluid flow, linear momentum is: a. ) a vector quantity equal to the product of mass and velocity b. ) a scalar quantity equal to the product mass and velocity c. ) a scalar quantity to the product of force and length of time is applied d. ) the change in impulse

A vector quantity equal to the product of mass and velocity

Orifice coefficients are used to determine: a. ) energy losses b. ) energy gains c. ) mass losses d. ) energy losses and mass gains

Energy losses

The coefficient of velocity equal to the: a. ) product of the coefficient of discharge and the coefficient of contraction b. ) actual velocity divided by the theoretical velocity c. ) sum of the coefficient of discharge and the coefficient of contraction d. ) difference of the coefficient discharge and the coefficient of contraction

Actual velocity divided by the theoretical velocity

When a falling object reaches a speed at which the drag force equals its weight, it has achieved: a. ) Mach one b. ) a laminar boundary layer c. ) a turbulent boundary layer d. ) terminal velocity

A turbulent boundary layer

Steam striking blades at zero angle

The locus of elevations to which water will rise in the piezometer tube is termed: a. ) energy gradient b. ) friction head c. ) hydraulic gradient d. ) critical path

Hydraulic gradient

The intake pipe to a hydraulic turbine from a dam is: a. ) tailrace b. ) spiral casing c. ) surge tank d. ) penstock

Penstock

In a hydro-electric plant using a Francis turbine with medium head, the speed can be regulated using the a. ) deflector gate b. ) nozzle c. ) wicket gate d. ) weir

Wicket gate

What is the pressure at the of draft tube in a turbine? a. ) below atmospheric b. ) vacuum c. ) atmospheric d. ) gage

Atmospheric

The locus of elevations to which water will rise in the piezometer tube is termed: a. ) energy gradient b. ) friction head c. ) hydraulic gradient d. ) critical path

Hydraulic gradient

The intake pipe to a hydraulic turbine from a dam is: a. ) tailrace b. ) spiral casing c. ) surge tank d. ) penstock

Penstock

Which of the following is used as high head turbine? a. ) Impulse b. ) Francis c. ) Reaction d. ) Propeller

Impulse

The coefficient of contraction is the ratio of the: a. ) area of vena contracta to the orifice area b. ) actual discharge to the theoretical discharge c. ) actual velocity to the theoretical velocity d. ) effective head to the actual head

Area of vena contracta to the orifice area

A type of water turbine where a jet of water is made to fall on the blades or buckets and due to the impulse of water, the turbine starts to move. a. ) Pelton wheel b. ) Steam turbine c. ) Francis turbine d. ) Reaction turbine

Pelton wheel

Which of the following is a type of water turbine? a. ) Parson b. ) Hero c. ) Pelton d. ) Bankl

Pelton

The combination of enthalpy and kinetic energy of fluid is termed as: a. ) latent enthalpy b. ) heat enthalpy c. ) throttling enthalpy d. ) stagnation enthalpy

Stagnation enthalpy

Flow measuring devices include all of the following except: a. ) flow nozzles b. ) venture area meters c. ) pitot tubes d. ) precision tachometers

Precision tachometers

Flow measuring devices include all of the following except: a. ) orifice plate meters b. ) hot-wire anemometers c. ) magnetic flow meters d. ) mercury barometers

Mercury barometers

The locus of elevation is: a. ) critical point b. ) hydraulic gradient c. ) energy gradient d. ) friction gradient

Hydraulic gradient

A Kaplan turbine is: a. ) a high head mixed flow turbine b. ) an inward flow impulse turbine c. ) an outward flow reaction turbine d. ) low head axial flow turbine

Low head axial flow turbine

One could expect the possibility of Reynolds number similarity in all of the following cases except: a. ) submarines b. ) torpedoes c. ) seaplane hulls d. ) supersonic aircraft

Seaplane hulls

In the absence of any heat and work interactions and any changes in potential energy, the stagnation enthalpy of a fluid remains constant during ___ a. ) unsteady flow b. ) steady flow c. ) turbulent flow d. ) variable flow

Steady flow

A Francis turbine has what flow? a. ) Inward flow reaction b. ) Outward flow impulse c. ) Outward flow reaction d. ) Inward flow impulse

Inward flow reaction

The function of a turbine is to: a. ) transfer heat from one fluid to another b. ) increase the total energy content of the flow c. ) extract energy from the flow d. ) exchange heat to increase energy to the flow

Extract energy from the flow

One could expect the possibility of Froude number similarity in all of the following cases except: a. ) motion of a fluid jet b. ) flow over spillways c. ) surge and flood waves d. ) subsonic airfoils

Subsonic airfoils

The coefficient of velocity, Cv, accounts for the: a. ) effects on the flow area of contraction, friction, and turbulence b. ) small effect of friction and turbulence of the orifice c. ) changes in diameters of a converging pipe d. ) effects of cpmpressibility

Small effect of friction and turbulence of the orifice

The matching of scale model and full-scale results for a fluid dynamic phenomena with a free surface requires equality of: a.) Reynolds number b Weber number c.) Froude number d.) Cauchy number

Froude number

The following are all examples of indirect (secondary) miscellaneous methods to measure flow except: a. ) turbine and propeller meters b. ) magnetic flow meters c. ) positive displacement meters d. ) hot-wire anemometers

Positive displacement meters

The matching of scale model and full-scale prototype results for a fluid dynamic phenomena involving surface tension requires equality of: a. ) Reynolds nummber b. ) Weber number c. ) Froude number d. ) Cauchy number

Weber number

The fact that there is no resistance to bodies moving through an ideal (non-viscous) fluids is known as: a. ) Reynold's analogy b. ) D' Alembert's paradox c. ) Newton's second law d. ) the second law of thermodynamics

D' Alembert's paradox

What must be done to change the direction of rotation of a 440-volt, 3-phase induction motor? a. ) reverse lines to start winding b. ) interchange any two power leads c. ) replace any two wires to the rotor d. ) remove any power leads

Interchange any two power leads

Flow measuring devices include all of the following except: a. ) venturi meters b. ) static pressure probes c. ) turbine and propeller meters d. ) magnetic dynamometers

Magnetic dynamometers

The fact that a fluid's velocity increases as the cross sectional area of the pipe through which it flow decreases is due to: a. ) Bernoulli's equation b. ) the continuity equation c. ) the momentum equation d. ) the perfect gas law

The continuity equation

The coefficient of velocity is equal to the: a. ) product of the coefficient of discharge and the coefficient of contraction b. ) actual velocity divided by the theoretical velocity c. ) sum of the coefficient of discharge and the coefficient of contraction d. ) difference of the coefficient of discharge and the coefficient of contraction

Actual velocity divided by the theoretical velocity

In fluid flow, linear momentum is: a. ) a vector quantity to the product of mass and velocity b. ) a scalar quantity equal to the product mass and velocity c. ) a scalar quantity to the product of force and length of time is applied d. ) the change in impulse

A vector quantity equal to the product of mass and velocity

Volume tanks

All of the following fluid phenomena are based on the force momentum principle of a flowing fluid except: a. ) turbines b. ) Pelton wheels c. ) Diesel automobile engines d. ) jet engines

Diesel automobiles engines

The locus of elevation is: a. ) critical point b. ) hydraulic gradient c. ) energy gradient d. ) friction gradient

Hydraulic gradient

A Francis turbine has what flow? a. ) Inward flow reaction b. ) Outward flow impulse c. ) Outward flow reaction d. ) Inward flow impulse

Inward flow reaction

Area of vena contracta to the orifice area

In pumped storage plant a. ) power is produced by pumps b. ) water is stored by pumping to high pressures c. ) pressure accumulators are used d. ) downstream water is pumped upstream during offload perios

Downstream water is pumped upstream during offload periods