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PIPE > Chapter 9 HYDROELECTRIC PLANT > Flashcards

Chapter 9 HYDROELECTRIC PLANT Flashcards

1
Q

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

A

C. air ejector

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2
Q

The primary purpose of a turbine in a fluid loop is to:

A

C. extract energy from the flow

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3
Q

A vena contracta in a fluid jet issuing through a hole in a plate is located approximately:

A

B. at jet’s minimum diameter

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4
Q

The following are all examples of indirect (secondary) miscellaneous methods to measure flow except:

A

C.positive displacement meters

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5
Q

One could expect the possibility of Reynold’s number similarity in all of the following cases except:

A

D. weirs

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6
Q

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

A

D. closed - pipe turbulent pipe flow

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7
Q

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

A

D. subsonic airfoils

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8
Q

In fluid flow, liner momentum is:

A

A. A vector quantity equal to the product of mass and velocity

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9
Q

All of the following fluid phenomena are based on the force momentum principle of a following fluid except:

A

B. The continuity equation

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10
Q

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

A

C. Steady flow

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11
Q

When a falling object reaches a speed at which the drag force equals its weight, it has achieved:

A

C. Turbulent boundary layer

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12
Q

The coefficient of discharge is the ratio of the:

A

A. Area of vena contracta to the orifice area

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13
Q

The coefficient of velocity is equal to the:

A

B . Actual velocity divided by the theoretical velocity

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14
Q

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

A

B . Torriceili’s equation holds

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15
Q

In parallel pipe system originating and terminating in common junctions,

A

B . Pressure drops through each branch are equal

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16
Q

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

A

D. All of the above

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17
Q

Flow measuring devices include all if the following except

A

D . Magnectic dynanometers

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18
Q

Flow measuring devices include all of the following except:

A

D . Mercury barometers

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19
Q

Flow measuring devices include all the following except:

A

D . Precision tachometers

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20
Q

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

A

C. Volume tanks

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21
Q

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

A

C . Weight and mass scales

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22
Q

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

A

D. Mass flow

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23
Q

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

A

B. Flow velocity and pressure

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24
Q

The combination of enthalphy and kinetic energy of fluid is termed as:

A

D . Stagnation enthalphy

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25
Q

The coefficient of velocity, Cv accounts for the:

A

B . Small effect of friction and turbulence of the orifice

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26
Q

Expansion factors take into account the:

A

D . Effects of compressibility

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27
Q

The matching of scale model and full scale results for a fluid dynamic phenomena with a free surface requires equality of:

A

C . Froude number

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28
Q

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

A

D . Mach number

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29
Q

The matching of scale model and full scale prototype results for a fluid dynamic phenomena involving surface tension requires equality of:

A

B . Weber number

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30
Q

The matching of scale model and full scale prototype results for a fluid dynamic phenomena involving a fully submerged body requires equality of:

A

A . Reynold’s number

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31
Q

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

A

B. Dynamic (a time dependent phenomena)

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32
Q

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’ Alembet’s paradox drag

A

D. d’ Alembet’s paradox drag (answer)

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33
Q

The magnitude of the drag coefficient of a sphere in water is dependent upon all of the following except:

A

C . Unit of measure (SI of English engineering system)

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34
Q

The fact that there is no resistance to bodies moving through an ideal (non viscous) fluid is known as:

A

B . D’ Alembert’s paradox

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35
Q

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

B. The continuity equation

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36
Q

The coefficient of velocity is equal to the:

A

B. Actual discharge to the theoretical discharge

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37
Q

One could expect the possibility of Reynold’s number similarity in all of the following cases except:

A

C. Seaplane hulls

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38
Q

The function of a turbine is to

A

C. Extract energy from the flow

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39
Q

A pitot tube is used to measure the

A

D. Velocity of the flow

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40
Q

Orifice coefficients are used to determine

A

A. Energy losses

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41
Q

The coefficient of velocity is the ratio of the

A

C. Actual discharge velocity to the theoretical discharge velocity

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42
Q

The volume flow passes through a venturimeter is

A

C. Constant

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43
Q

What must be done to change the direction of rotation of a 440 volt 3 phase induction motor

A

B. Interchange any of the two power leads

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44
Q

A draft tube is a part of which power plant

A

D. Hydro electric power plant

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45
Q

In the hydro electric plant having a medium head and using a Francis turbine speed may be regulated through:

A

C. Wicket gate

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46
Q

A Francis turbine has what flow ?

A

A. Inward flow reaction

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47
Q

Which of the following is a type of water turbine?
A. Parson
B. Hero
C. Pelton
D. Bankl

A

C. Pelton

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48
Q

What is the use of a hydraulic jump

A

D. Reduce the energy flow

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49
Q

A Kaplan turbine is

A

D. Low head axial flow turbine

50
Q

The locus of elevation is

A

B. Hydraulic gradient

51
Q

The locus of elevation to which water will rise in the piezometer tube is termed

A

C. Hydraulic gradient

52
Q

The intake pipe to a hydraulic turbine from a dam is

A

D. Penstock

53
Q

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

A. Pelton wheel

54
Q

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

A

D. Dead storage

55
Q

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

A

C. Wicket gate

56
Q

In the deep well installation or operation, the difference between static water level and operating water level is known as

A

B. Drawdown

57
Q

Which of the following is a characteristic of an impulse turbine

A

C. Steam striking blades at zero angle

58
Q

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

A

C. Atmospheric

59
Q

An impulse turbine is used for

A

C. High head

60
Q

Which of the following is used as high head turbine

A

A. Impulse

61
Q

In pumped storage plant

A

D. Downstream water is pumped upstream during offload periods

62
Q

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

A

C. Atmospheric

63
Q

An impulse turbine has

A

C. High head

64
Q

High head turbine is a/an

A

A. Impulse

65
Q

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

A

D. Dead storage

66
Q

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

A

C. Wicket gate

67
Q

In a deep well installation or operation, the difference between static water level and operating water level is called

A

B. Drawdown

68
Q

Which of the following is a characteristic of an impulse turbine

A

C. Steam striking blades at zero angle

69
Q

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

A

A. Pelton wheel

70
Q

The intake pipe to a hydraulic turbine from a dam is

A

D. Penstock

71
Q

In the hydro electric plant having a medium head and using a Francis turbine, the turbine speed may be regulated through

A

C. Wicket gate

72
Q

A Francis turbine has what flow

A

A. Inward flow reaction

73
Q

Which of the following us a type of water turbine

74
Q

Hydraulic jump is used to

A

D. Reduce the energy of flow

75
Q

A Kaplan turbine is

A

D. Low head axial flow turbine

76
Q

The locus of elevation is

A

B. Hydraulic gradient

77
Q

The locus of elevation to which water will rise in the piezometer tube is termed

A

C. Hydraulic gradient

78
Q

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

A

C. Air injector

79
Q

The primary purpose of a turbine in a fluid loop is to

A

C. Extract energy from the flow

80
Q

A vena contracta in a fluid jet issuing through a hole in a plate is located approximately:

A

B. At jet’s minimum diameter

81
Q

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

A

C. Positive displacement meters

82
Q

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

A. Pumps
B. Fans
C. Turbines
D. Weirs

83
Q

One could expect the possibility if 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

A

D. Closed pipe turbulent pipe flow

84
Q

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

A. Motion of a fluid jet
B. Flow over spillways
C. Surge and flood waves
D. Subsonic arcfoils

A

D. Subsonic arcfoils

85
Q

In fluid flow, linear momentum is

A

A. A vector quantity equal to the product of mass and velocity

86
Q

All of the following fluid phenomena are based on the force momentum principle of a following fluid except

A. Turbines
B. Pelton wheels
C. Diesel automobile engines
D. Jet engines

A

C. Diesel automobile engines

87
Q

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

B. Steady flow

88
Q

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

B. The continuity equation

89
Q

When a falling object reaches a speed at which the drag force equals its weight , it has achieved

A

C. A turbulent boundary layer

90
Q

The coefficient of contraction is the ratio of the

A

A. Area of Vena Contracta to the orifice area

91
Q

The coefficient of discharge is the ratio of the

A

B. Actual discharge to the theoretical discharge

92
Q

The coefficient of velocity is equal to the

A

B. Actual velocity divided by the theoretical velocity

93
Q

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

A

B. Torricelli’s equation holds

94
Q

In a parallel pipe system originating and terminating in common junctions

A

B. Pressure drops through each branch are equal

95
Q

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

A

D. All of the above

96
Q

Flow measuring devices include all of the following except

A. Venturi meters
B. Static pressure probes
C. Turbine and propeller meters
D. Magnetic dynamometers

A

D. Magnetic dynamometers

97
Q

Flow measuring devices include all of the following except

A. Orifice plate meters
B. Hot wire anemometers
C. Magnetic flow meters
D. Mercury barometers

A

D. Mercury barometers

98
Q

Flow measuring devices include all the following except

A. Flow nozzles
B. Venture area meters
C. Pitot tubes
D. Precision tachometers

A

D. Precision tachometers

99
Q

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

A

C. Volume tanks

100
Q

The following are examples of 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

A

C. Weight and mass scales

101
Q

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

A. Pressure drop
B. Friction loss
C. Head loss
D. Mass flow

A

D. Mass flow

102
Q

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

A

B. Flow velocity and pressure

103
Q

The combination of enthalpy and kinetic energy of fluid is termed as

A

D. Stagnation enthalpy

104
Q

The coefficient of velocity, Cv, accounts for the

A

B. Small effect of friction and turbulence of the orifice

105
Q

Expansion factors take into account the

A

D. Effects of compressibility

106
Q

The matching of scale model and full scale results for a fluid dynamic phenomena with a free surface requires equality of

A

C. Froude number

107
Q

The matching of scale model and full scale results for a fluid dynamic phenomena involving COMPRESSIBLE fluid requires equality of

A

D. Mach number

108
Q

The matching of scale model and full scale prototype results for a fluid dynamic phenomena involving SUBMERGED BODY requires equality of

A

A. Reynold’s number

109
Q

The matching of scale model and full scale prototype results for a fluid dynamic phenomena involving SURFACE TENSION requires equality of

A

B. Weber number

110
Q

The water hammer phenomenon is primarily what kind of fluid mechanics

A

B. Dynamic ( a time dependent phenomena)

111
Q

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

A

D. D’ Alembert’s paradox drag

112
Q

The magnitude of the drag coefficient of a sphere in water is dependent upon all of the following except
A. Fluid density
B. Fluid velocity
C. Unit of measure
D. Drag force

A

C. Unit of measure (SI or English)

113
Q

The fact that there is no resistance to bodies moving through an ideal (non viscous) fluids is known as

A

B. D’ Alembert’s Paradox

114
Q

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

A. Submarines
B. Torpedoes
C. Seaplane hulls
D. Supersonic aircrafts

A

C. Seaplane hulls

115
Q

The function of a turbine is to

A

C. Extract energy from the flow

116
Q

The pitot tube is used to measure the

A

D. Velocity of flow

117
Q

Orifice coefficients are used to determine

A

A. Energy losses

118
Q

The coefficient of velocity is the ratio of the

A

C. Actual discharge velocity to the theoretical discharge velocity

119
Q

The volume flow passes through a venturimeter is

A

C. Constant

120
Q

Which of the following devices used to measure the discharge of outflow from a vessel

A

B. Orifice

121
Q

Which of the following devices used to measure the discharge of outflow from a vessel

A

B. Orifice

122
Q

Which of the following devices used to measure the discharge of outflow from a vessel

A

B. Orifice

PIPE (17 decks)

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