Quiz about CHAPTER 9 – HYDROELECTRIC PLANT

Question 1

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

Accepted Answer

C. Air ejector

Answer

A. Air pump

Answer

B. Air injector

Answer

D. Air jet

Question 2

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

Accepted Answer

C. Extract energy from the flow

Answer

A. Add energy to the flow

Answer

B. Add mass to the flow

Answer

D. None of the above

Question 3

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

Accepted Answer

C. Positive displacement meters

Answer

A. Turbine and propeller meters

Answer

B. Magnetic flow meters

Answer

D. Hot-wire anemometers

Question 4

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

Accepted Answer

D. Weirs

Answer

A. Pumps

Answer

B. Fans

Answer

C. Turbines

Question 5

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

Accepted Answer

D. Closed-pipe turbulent pipe flow

Answer

A. Surface ships

Answer

B. Surface wave motion

Answer

C. Flow over weirs

Question 6

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

Accepted Answer

D. Subsonic airfoils

Answer

A. Motion of a fluid jet

Answer

B. Flow over spillways

Answer

C. Surge and flood waves

Question 7

In fluid flow, linear momentum is:

Accepted Answer

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

Answer

B. A scalar quantity equal to the product mass and velocity

Answer

C. A scalar quantity equal to the product of force and length of time is applied

Answer

D. The change in impulse

Question 8

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

Accepted Answer

C. Diesel automobile engines

Answer

A. Turbines

Answer

B. Pelton wheels

Answer

D. Jet engines

Question 9

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

Accepted Answer

B. Steady flow

Answer

A. Unsteady flow

Answer

C. Turbulent flow

Answer

D. Variable flow

Question 10

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

Accepted Answer

C. A turbulent boundary layer

Answer

A. Mach one

Answer

B. A laminar boundary layer

Answer

D. Terminal velocity

Question 11

The coefficient of contraction is the ratio of the:

Accepted Answer

A. Area of vena contracta to the orifice area

Answer

B. Actual discharge to the theoretical discharge

Answer

C. Actual velocity to the theoretical velocity

Answer

D. Effective head to the actual head

Question 12

The coefficient of discharge is the ratio of the:

Accepted Answer

B. Actual discharge to the theoretical discharge

Answer

A. Area of vena contracta to the orifice area

Answer

C. Actual velocity to the theoretical velocity

Answer

D. Effective head to the actual head

Question 13

The coefficient of velocity is equal to the:

Accepted Answer

B. Actual velocity divided by the theoretical velocity

Answer

A. Product of the coefficient of discharge and the coefficient of contraction

Answer

C. Sum of the coefficient of discharge and the coefficient of contraction

Answer

D. Difference of the coefficient of discharge and the coefficient of contraction

Question 14

In parallel pipe system originating and terminating in common junctions.

Accepted Answer

B. Pressure drops through each branch are equal

Answer

A. Mass flows through each branch are equal

Answer

C. Lengths of each branch are equal

Answer

D. Flow areas of each branch are equal

Question 15

Flows through multi-loop systems maybe computed by:

Accepted Answer

D. All of the above

Answer

A. Any closed-form solution of simultaneous equations

Answer

B. The Hardy-Cross method

Answer

C. Trial and error

Question 16

Flow measuring devices include all of the following except:

Accepted Answer

D. Magnetic dynamometers

Answer

A. Venturi meters

Answer

B. Static pressure probes

Answer

C. Turbine and propeller meters

Question 17

Flow measuring devices include all of the following except:

Accepted Answer

D. Mercury barometers

Answer

A. Orifice plate meters

Answer

B. Hot-wire anemometers

Answer

C. Magnetic flow meters

Question 18

Flow measuring devices include all of the following except:

Accepted Answer

D. Precision tachometers

Answer

A. Flow nozzles

Answer

B. Venture area meters

Answer

C. Pilot tubes

Question 19

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

Accepted Answer

C. Volume tanks

Answer

A. Variable area meters

Answer

B. Venture meters

Answer

D. Flow nozzles

Question 20

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

Accepted Answer

C. Weight and mass scales

Answer

A. Pilot static meters

Answer

B. Static pressure probes

Answer

D. Direction-sensing probes

Question 21

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

Accepted Answer

D. Mass flow

Answer

A. Pressure drop

Answer

B. Friction loss

Answer

C. Head loss

Question 22

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

Accepted Answer

B. Flow velocity and pressure

Answer

A. Flow velocity and friction

Answer

C. Friction and pressure

Answer

D. Pressure and mass flow

Question 23

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

Accepted Answer

D. Stagnation enthalpy

Answer

A. Latent enthalpy

Answer

B. Heat enthalpy

Answer

C. Throttling enthalpy

Question 24

The coefficient of velocity, C_v, accounts for the:

Accepted Answer

B. Small effect of friction and turbulence of the orifice

Answer

A. Effects on the flow area of contraction, friction and turbulence

Answer

C. Changes in diameters of a converging pipe

Answer

D. Effects of compressibility

Question 25

Expansion factors take into account the:

Accepted Answer

D. Effects of compressibility

Answer

A. Area of the vena contracta

Answer

B. Small effect of friction and turbulence of the orifice

Answer

C. Changes in diameters of a converging pipe

Question 26

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

Accepted Answer

C. Froude number

Answer

A. Reynolds number

Answer

B. Weber number

Answer

D. Cauchy number

Question 27

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

Accepted Answer

D. Mach number

Answer

A. Reynolds number

Answer

B. Froude number

Answer

C. Cauchy number

Question 28

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

Accepted Answer

B. Weber number

Answer

A. Reynolds number

Answer

C. Froude number

Answer

D. Cauchy number

Question 29

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

Accepted Answer

A. Reynolds number

Answer

B. Weber number

Answer

C. Froude number

Answer

D. Mach number

Question 30

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

Accepted Answer

B. Dynamic (a time-dependent phenomena)

Answer

A. Static (a phenomena independent of time)

Answer

C. Compressible

Answer

D. Incompressible

Question 31

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

Accepted Answer

C. Units of measure (SI or English Engineering System)

Answer

A. Fluid density

Answer

B. Fluid velocity

Answer

D. Drag force

Question 32

The function of a turbine is to:

Accepted Answer

C. Extract energy from the flow

Answer

A. Transfer heat from one fluid to another

Answer

B. Increase the total energy content of the flow

Answer

D. Exchange heat to increase energy to the flow

Question 33

Pitot tube is use to measure the:

Accepted Answer

D. Velocity of flow

Answer

A. Velocity of mass

Answer

B. Velocity of pipe

Answer

C. Flow

Question 34

Orifice coefficients are used to determine:

Accepted Answer

A. Energy losses

Answer

B. Energy gains

Answer

C. Mass losses

Answer

D. Energy losses and mass gains

Question 35

The coefficient of velocity is the ratio of the:

Accepted Answer

C. Actual discharge velocity to the theoretical discharge velocity

Answer

A. Area of vena contracta to the orifice area

Answer

B. Actual discharge to the theoretical discharge

Answer

D. Effective head to the actual head

Question 36

The volume flow passes through a venturimeter is:

Accepted Answer

C. Constant

Answer

A. Increasing

Answer

B. Decreasing

Answer

D. Varying

Question 37

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

Accepted Answer

B. Interchange any two power leads

Answer

A. Reverse lines to start winding

Answer

C. Replace any two wires to the rotor

Answer

D. Remove any power leads

Question 38

A draft tube is a part of which power plants?

Accepted Answer

D. Hydro-electric power plant

Answer

A. Diesel engine power plant

Answer

B. Gas turbine power plant

Answer

C. Steam power plant

Question 39

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

Accepted Answer

C. Wicket gate

Answer

A. Deflector gate

Answer

B. Nozzle

Answer

D. Forebay

Question 40

A Francis turbine has what flow?

Accepted Answer

A. Inward flow reaction

Answer

B. Outward flow impulse

Answer

C. Outward flow reaction

Answer

D. Inward flow impulse

Question 41

Which of the following is a type of water turbine?

Accepted Answer

C. Pelton

Answer

A. Parson

Answer

B. Hero

Answer

D. Bankl

Question 42

What is the use of a Hydraulic jump?

Accepted Answer

D. Reduce the energy of flow

Answer

A. Increase the flow rate

Answer

B. Reduce the flow rate

Answer

C. Reduce the velocity of flow

Question 43

A Kaplan turbine is:

Accepted Answer

D. Low head axial flow turbine

Answer

A. A high head mixed flow turbine

Answer

B. An inward flow impulse turbine

Answer

C. An outward flow reaction turbine

Question 44

The locus of elevation is:

Accepted Answer

B. Hydraulic gradient

Answer

A. Critical point

Answer

C. Energy gradient

Answer

D. Friction gradient

Question 45

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

Accepted Answer

B. Hydraulic gradient

Answer

A. Critical point

Answer

C. Energy gradient

Answer

D. Friction gradient

Question 46

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

Accepted Answer

C. Hydraulic gradient

Answer

A. Energy gradient

Answer

B. Friction head

Answer

D. Critical path

Question 47

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.

Accepted Answer

A. Pelton wheel

Answer

B. Steam turbine

Answer

C. Francis turbine

Answer

D. Reaction turbine

Question 48

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

Accepted Answer

D. Dead storage

Answer

A. Bottom storage

Answer

B. Sub-soil storage

Answer

C. Spring reserve

Question 49

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

Accepted Answer

C. Wicket gate

Answer

A. Deflector gate

Answer

B. Nozzle

Answer

D. Weir

Question 50

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

Accepted Answer

B. Drawdown

Answer

A. Suction lift

Answer

C. Priming level

Answer

D. Clogging

Question 51

Which of the following is a characteristic of an impulse turbine?

Accepted Answer

C. Steam striking blades at zero angle

Answer

A. Steam striking blades on angle

Answer

B. No steam reaction to velocity

Answer

D. Steam reversing direction

Question 52

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

Accepted Answer

C. Atmospheric

Answer

A. Below atmospheric

Answer

B. Vacuum

Answer

D. Gage

Question 53

An impulse turbine are used for:

Accepted Answer

C. High head

Answer

A. Low head

Answer

B. Medium head

Answer

D. Very low head

Question 54

Which of the following is used as high head turbine?

Accepted Answer

A. Impulse

Answer

B. Francis

Answer

C. Reaction

Answer

D. Propeller

Question 55

In pumped storage plant

Accepted Answer

D. Downstream water is pumped upstream during offload periods

Answer

A. Power is produced by pumps

Answer

B. Water is stored by pumping to high pressures

Answer

C. Pressure accumulators are used

Question 56

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

Accepted Answer

C. Atmospheric

Answer

A. Below atmospheric

Answer

B. Vacuum

Answer

D. Gage

Question 57

An impulse turbine has:

Accepted Answer

C. High head

Answer

A. Low head

Answer

B. Medium head

Answer

D. Very low head

Question 58

High head turbine is a/an:

Accepted Answer

A. Impulse

Answer

B. Francis

Answer

C. Reaction

Answer

D. Propeller

Question 59

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

Accepted Answer

D. Dead storage

Answer

A. Bottom storage

Answer

B. Sub-soil storage

Answer

C. Spring reserve

Question 60

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

Accepted Answer

C. Wicket gate

Answer

A. Deflector gate

Answer

B. Nozzle

Answer

D. Weir

Question 61

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

Accepted Answer

B. Drawdown

Answer

A. Suction lift

Answer

C. Priming level

Answer

D. Clogging

Question 62

Which of the following is a characteristic of an impulse turbine?

Accepted Answer

C. Steam striking blades to zero angle

Answer

A. Steam striking blades of angle

Answer

B. No steam reaction to velocity

Answer

D. Steam reversing direction

Question 63

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.

Accepted Answer

A. Pelton wheel

Answer

B. Steam turbine

Answer

C. Francis turbine

Answer

D. Reaction turbine

Question 64

The intake pipe to a hydraulic turbine from a dam is:

Accepted Answer

D. Penstock

Answer

A. Tailrace

Answer

B. Spiral casing

Answer

C. Surge tank

CHAPTER 9 – HYDROELECTRIC PLANT

120 questions

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

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

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

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

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

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

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

In fluid flow, linear momentum is:

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

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

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