Chapter 9 HYDROELECTRIC PLANT Flashcards
(122 cards)
1
Q
In turbine installation, the air is removed from the condenser by
A
C. air ejector
2
Q
The primary purpose of a turbine in a fluid loop is to:
A
C. extract energy from the flow
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
4
Q
The following are all examples of indirect (secondary) miscellaneous methods to measure flow except:
A
C.positive displacement meters
5
Q
One could expect the possibility of Reynold’s number similarity in all of the following cases except:
A
D. weirs
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
7
Q
One could expect the possibility of Froude number similarity in all of the following cases except :
A
D. subsonic airfoils
8
Q
In fluid flow, liner momentum is:
A
A. A vector quantity equal to the product of mass and velocity
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
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
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
12
Q
The coefficient of discharge is the ratio of the:
A
A. Area of vena contracta to the orifice area
13
Q
The coefficient of velocity is equal to the:
A
B . Actual velocity divided by the theoretical velocity
14
Q
Which of the following is not a similarity between a submerged culvert and a siphon?
A
B . Torriceili’s equation holds
15
Q
In parallel pipe system originating and terminating in common junctions,
A
B . Pressure drops through each branch are equal
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
17
Q
Flow measuring devices include all if the following except
A
D . Magnectic dynanometers
18
Q
Flow measuring devices include all of the following except:
A
D . Mercury barometers
19
Q
Flow measuring devices include all the following except:
A
D . Precision tachometers
20
Q
The following are examples of indirect (secondary) measurements to measure flow rates using obstruction meter except:
A
C. Volume tanks
21
Q
The following are examples of indirect (secondary) measurements to measure flow rates using obstruction meter except:
A
C . Weight and mass scales
22
Q
In series pipe system, all of the following parameters vary from section to section except:
A
D. Mass flow
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
24
Q
The combination of enthalphy and kinetic energy of fluid is termed as:
A
D . Stagnation enthalphy
25
The coefficient of velocity, Cv accounts for the:
B . Small effect of friction and turbulence of the orifice
26
Expansion factors take into account the:
D . Effects of compressibility
27
The matching of scale model and full scale results for a fluid dynamic phenomena with a free surface requires equality of:
C . Froude number
28
The matching of scale model and full scale results for a fluid dynamic phenomena involving compressible fluids requires equality of:
D . Mach number
29
The matching of scale model and full scale prototype results for a fluid dynamic phenomena involving surface tension requires equality of:
B . Weber number
30
The matching of scale model and full scale prototype results for a fluid dynamic phenomena involving a fully submerged body requires equality of:
A . Reynold’s number
31
The water hammer phenomenon is primarily what kind of fluid mechanics?
B. Dynamic (a time dependent phenomena)
32
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
D. d’ Alembet’s paradox drag (answer)
33
The magnitude of the drag coefficient of a sphere in water is dependent upon all of the following except:
C . Unit of measure (SI of English engineering system)
34
The fact that there is no resistance to bodies moving through an ideal (non viscous) fluid is known as:
B . D’ Alembert’s paradox
35
The fact that a fluid's velocity increases as the cross sectional area of the pipe through which it flow decreases is due to
B. The continuity equation
36
The coefficient of velocity is equal to the:
B. Actual discharge to the theoretical discharge
37
One could expect the possibility of Reynold's number similarity in all of the following cases except:
C. Seaplane hulls
38
The function of a turbine is to
C. Extract energy from the flow
39
A pitot tube is used to measure the
D. Velocity of the flow
40
Orifice coefficients are used to determine
A. Energy losses
41
The coefficient of velocity is the ratio of the
C. Actual discharge velocity to the theoretical discharge velocity
42
The volume flow passes through a venturimeter is
C. Constant
43
What must be done to change the direction of rotation of a 440 volt 3 phase induction motor
B. Interchange any of the two power leads
44
A draft tube is a part of which power plant
D. Hydro electric power plant
45
In the hydro electric plant having a medium head and using a Francis turbine speed may be regulated through:
C. Wicket gate
46
A Francis turbine has what flow ?
A. Inward flow reaction
47
Which of the following is a type of water turbine?
A. Parson
B. Hero
C. Pelton
D. Bankl
C. Pelton
48
What is the use of a hydraulic jump
D. Reduce the energy flow
49
A Kaplan turbine is
D. Low head axial flow turbine
50
The locus of elevation is
B. Hydraulic gradient
51
The locus of elevation to which water will rise in the piezometer tube is termed
C. Hydraulic gradient
52
The intake pipe to a hydraulic turbine from a dam is
D. Penstock
53
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
54
The lowest portion to storage basin from where the water is not drawn is
D. Dead storage
55
In a hydro electric plant using a Francis turbine with medium head, the speed can be regulated using the
C. Wicket gate
56
In the deep well installation or operation, the difference between static water level and operating water level is known as
B. Drawdown
57
Which of the following is a characteristic of an impulse turbine
C. Steam striking blades at zero angle
58
What is the pressure at the exit of a draft tube in a turbine
C. Atmospheric
59
An impulse turbine is used for
C. High head
60
Which of the following is used as high head turbine
A. Impulse
61
In pumped storage plant
D. Downstream water is pumped upstream during offload periods
62
What is the pressure at the exit of a draft tube in a turbine
C. Atmospheric
63
An impulse turbine has
C. High head
64
High head turbine is a/an
A. Impulse
65
The lowest portion to storage basin from where the water is not drawn is
D. Dead storage
66
In a hydro electric plant using a Francis turbine with medium head, the speed can be regulated using the
C. Wicket gate
67
In a deep well installation or operation, the difference between static water level and operating water level is called
B. Drawdown
68
Which of the following is a characteristic of an impulse turbine
C. Steam striking blades at zero angle
69
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. Pelton wheel
70
The intake pipe to a hydraulic turbine from a dam is
D. Penstock
71
In the hydro electric plant having a medium head and using a Francis turbine, the turbine speed may be regulated through
C. Wicket gate
72
A Francis turbine has what flow
A. Inward flow reaction
73
Which of the following us a type of water turbine
C. Pelton
74
Hydraulic jump is used to
D. Reduce the energy of flow
75
A Kaplan turbine is
D. Low head axial flow turbine
76
The locus of elevation is
B. Hydraulic gradient
77
The locus of elevation to which water will rise in the piezometer tube is termed
C. Hydraulic gradient
78
In turbine installation, the air is removed from the condenser by
C. Air injector
79
The primary purpose of a turbine in a fluid loop is to
C. Extract energy from the flow
80
A vena contracta in a fluid jet issuing through a hole in a plate is located approximately:
B. At jet's minimum diameter
81
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
C. Positive displacement meters
82
One could expect the possibility Reynolds number similarity in all of the following cases except
A. Pumps
B. Fans
C. Turbines
D. Weirs
D. Weirs
83
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
D. Closed pipe turbulent pipe flow
84
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
D. Subsonic arcfoils
85
In fluid flow, linear momentum is
A. A vector quantity equal to the product of mass and velocity
86
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
C. Diesel automobile engines
87
In the absence of any heat and work interactions and any changes in potential energy, the stagnation enthalpy of a fluid remains constant during
B. Steady flow
88
The fact that a fluid's velocity increases as the cross sectional area of the pipe through which it flow decreases is due to
B. The continuity equation
89
When a falling object reaches a speed at which the drag force equals its weight , it has achieved
C. A turbulent boundary layer
90
The coefficient of contraction is the ratio of the
A. Area of Vena Contracta to the orifice area
91
The coefficient of discharge is the ratio of the
B. Actual discharge to the theoretical discharge
92
The coefficient of velocity is equal to the
B. Actual velocity divided by the theoretical velocity
93
Which of the following is not a similarity between a submerged culvert and a siphon
B. Torricelli's equation holds
94
In a parallel pipe system originating and terminating in common junctions
B. Pressure drops through each branch are equal
95
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
D. All of the above
96
Flow measuring devices include all of the following except
A. Venturi meters
B. Static pressure probes
C. Turbine and propeller meters
D. Magnetic dynamometers
D. Magnetic dynamometers
97
Flow measuring devices include all of the following except
A. Orifice plate meters
B. Hot wire anemometers
C. Magnetic flow meters
D. Mercury barometers
D. Mercury barometers
98
Flow measuring devices include all the following except
A. Flow nozzles
B. Venture area meters
C. Pitot tubes
D. Precision tachometers
D. Precision tachometers
99
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
C. Volume tanks
100
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
C. Weight and mass scales
101
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
D. Mass flow
102
Venturi meters, pitot static gauges, orifice meters, flow nozzles, and differential manometers all depend upon relationship between
B. Flow velocity and pressure
103
The combination of enthalpy and kinetic energy of fluid is termed as
D. Stagnation enthalpy
104
The coefficient of velocity, Cv, accounts for the
B. Small effect of friction and turbulence of the orifice
105
Expansion factors take into account the
D. Effects of compressibility
106
The matching of scale model and full scale results for a fluid dynamic phenomena with a free surface requires equality of
C. Froude number
107
The matching of scale model and full scale results for a fluid dynamic phenomena involving COMPRESSIBLE fluid requires equality of
D. Mach number
108
The matching of scale model and full scale prototype results for a fluid dynamic phenomena involving SUBMERGED BODY requires equality of
A. Reynold's number
109
The matching of scale model and full scale prototype results for a fluid dynamic phenomena involving SURFACE TENSION requires equality of
B. Weber number
110
The water hammer phenomenon is primarily what kind of fluid mechanics
B. Dynamic ( a time dependent phenomena)
111
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. D' Alembert's paradox drag
112
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
C. Unit of measure (SI or English)
113
The fact that there is no resistance to bodies moving through an ideal (non viscous) fluids is known as
B. D' Alembert's Paradox
114
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
C. Seaplane hulls
115
The function of a turbine is to
C. Extract energy from the flow
116
The pitot tube is used to measure the
D. Velocity of flow
117
Orifice coefficients are used to determine
A. Energy losses
118
The coefficient of velocity is the ratio of the
C. Actual discharge velocity to the theoretical discharge velocity
119
The volume flow passes through a venturimeter is
C. Constant
120
Which of the following devices used to measure the discharge of outflow from a vessel
B. Orifice
121
Which of the following devices used to measure the discharge of outflow from a vessel
B. Orifice
122
Which of the following devices used to measure the discharge of outflow from a vessel
B. Orifice
