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 equal to the product of force and length of time is applied

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

The coefficient of discharge is the ratio of the:

B. Actual discharge to the theoretical discharge

A. Area of vena contracta to the orifice area

C. Actual velocity to the theoretical velocity

D. Effective head to the actual head

The coefficient of velocity is equal to the:

B. Actual velocity divided by the theoretical velocity

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

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

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

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

B. Toricelli’s equation holds

C. Both can experience entrance and exit losses

D. In both, the water flows downhill

In parallel pipe system originating and terminating in common junctions.

B. Pressure drops through each branch are equal

A. Mass flows through each branch are equal

C. Lengths of each branch are equal

D. Flow areas of each branch are equal

Flows through multi-loop systems maybe computed by:

A. Any closed-form solution of simultaneous equations

Flow measuring devices include all of the following except:

C. Turbine and propeller meters

The coefficient of velocity, C v, accounts for the:

B. Small effect of friction and turbulence of the orifice

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

C. Changes in diameters of a converging pipe

Expansion factors take into account the:

B. Small effect of friction and turbulence of the orifice

C. Changes in diameters of a converging pipe

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

B. Dynamic (a time-dependent phenomena)

A. Static (a phenomena independent of time)

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

D. D’Alembert’s paradox drag

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

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

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

D. The second law of thermodynamics

The function of a turbine is to:

A. Transfer heat from one fluid to another

B. Increase the total energy content of the flow

D. Exchange heat to increase energy to the flow

Orifice coefficients are used to determine:

D. Energy losses and mass gains

The coefficient of velocity is the ratio of the:

C. Actual discharge velocity to the theoretical discharge velocity

A. Area of vena contracta to the orifice area

B. Actual discharge to the theoretical discharge

D. Effective head to the actual head

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

B. Interchange any two power leads

A. Reverse lines to start winding

C. Replace any two wires to the rotor

A. A high head mixed flow turbine

B. An inward flow impulse turbine

C. An outward flow reaction turbine

CHAPTER 9 – HYDROELECTRIC PLANT

Authored by Nara Snipe

Mathematics

University

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MULTIPLE CHOICE QUESTION

10 sec • 1 pt

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

A. Air pump

B. Air injector

C. Air ejector

D. Air jet

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

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

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

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

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

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

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

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

A. Pumps

B. Fans

C. Turbines

D. Weirs

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

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

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

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

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CHAPTER 9 – HYDROELECTRIC PLANT

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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