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WorksheetsESAS PART 9 - GERALDINO REVIEWER
Total questions: 100
Worksheet time: 50mins
Which of the following states that the buoyant force on a floating object is equal to the weight of the water displaced?
A. Bernoulli's theorem
B. Archimedes' principles
C. Pascal's law
D. Continuity flow equation
What is the purpose of a surge tank in a pipe line
A. To smoothen the flow of water
B. To minimize friction losses in pipe
C. To prevent occurrence of hydraulic jump
D. To relieve the pressure due to water hammer
Which one is not a dimensionless parameter?
A. Froude number
B. Darcy-weisbach friction factor
C. Kinematic viscosity
D. Weber number
A venturimeter is used to measure which one?
A. Pressure of a flowing liquid
B. Discharge of liquid flowing in a pipe
C. Pressure difference of liquid flowing between two points in a pipe line
D. Velocity of a flowing liquid
Froude's number is the ratio of inertia force to which one?
A. Pressure force
B. Elastic force
C. Gravity force
D. Surface tension force
Which one is true about an ideal fluid?
A. It satisfies the continuity flow equation
B. It is similar to a perfect gas
C. It is frictionless and incompressible
D. It obeys Newton's law of viscosity
Which of the following instruments measure the average fluid velocity rather than a point or local velocity in a pipe?
A. Venturi meter
B. Orifice meter
C. Pitot tube
D. Both A and B
What is true about the polytropic exponent n, for a perfect gas undergoing an isobaric process?
A. n > 0
B. n→∞
C. n = 0
D. n < 0
Which one refers to a flow in which the quantity of liquid flowing per second is not constant?
A. Streamline flow
B. Turbulent flow
C. Steady flow
D. Unsteady flow
How do you call the velocity corresponding to Reynolds number of 2000?
A. Sub-sonic velocity
B. Super-sonic velocity
C. Lower critical velocity
D. Higher critical velocity
In a Mollier chart, the flow through a turbines represented by which curve?
A. Vertical line
B. Horizontal line
C. Curved line convex up
D. Curved line convex down
What is the pressure measured with the help of a pressure gauge?
A. Atmospheric pressure
B. Gauge pressure
C. Absolute pressure
D. Mean pressure
Which one is true about a perfect gas?
A. It has zero viscosity
B. It has a constant viscosity
C. It satisfies the relation PV = MRT
D. It is incompressible
Which of the following statements is the Bernoulli's principle valid?
A. The fluid must be inviscid
B. The fluid must be incompressible
C. All points evaluated must be on the same streamline
D. All of these
What is the difference between the energy grade line and the hydraulic grade line?
A. Potential energy
B. Kinetic energy
C. Pressure energy
D. Friction losses
Which one refers to the portion of a power canal which extends from the power house to the recipient water course?
A. Tail race
B. Exhaust
C. Tail surge channel
D. Discharge channel
What is the name of the flow through a long pipe at constant rate?
A. Steady non-uniform flow
B. Unsteady uniform flow
C. Unsteady non-uniform flow
D. Steady uniform flow
The viscosity of a fluid varies with which one?
A. Temperature only
B. Pressure only
C. Both temperature and pressure
D. Nothing, since viscosity is always constant
Which one refers to a characteristic of a thermodynamic system?
A. Phase
B. Process
C. Path
D. Property
Which one gives the relationship between the total volume of a mixture of nonreacting gases and their partial volumes?
A. Gravimetric fractions
B. Dalton's law
C. Mole fractions
D. Amagat's law
A cork is floating upright in a container partially filled with water. A vacuum pressure is appli applied to the container such that the air within the vessels partially removed. What will happen to the cork?
A. The cork will remain stationary
B. The cork will turn over on its side
C. The cork will rise somewhat in the water
D. The cork will sink somewhat in the water
Which of the following statements about the Mach number is not true?
A. Mach number has the dimensions of velocity
B. Mach number is the ratio of velocity to sonic velocity
C. Mach 1 is the maximum attainable velocity in a nozzle throat
D. Mach angle or angle the shock front makes with the velocity vector of a moving source
Venturi meters, pitot static gauges, orifice meters flow nozzles, and differential manometers all depend upon the relationship between which one?
A. Flow velocity and friction
B. Friction and pressure
C. Flow velocity and pressure
D. Pressure and mass flow
The relationship between pressure and altitude in the atmosphere is given by which one?
A. Newton's law on viscosity
B. Barometric height relationship
C. Perfect gas law
D. Conservation of mass
Which of the following is a property of surface tension?
A. It has units of force per unit length
B. It is strongly affected by pressure
C. It exists whenever there is density discontinuity
D. Both A and C
Which one is not a correct value of standard atmospheric pressure?
A. 1.0 atm
B. 760 torr
C. 14.692 psia
D. 1000 mm Hg
What is the primary purpose of a pump in a fluid loop?
A. To add energy to the flow
B. To extract energy from the flow
C. To add mass to the flow
D. To extract mass from the flow
The water hammer phenomenon is primarily what kind of fluid mechanics?
A. Static
B. Dynamic
C. Compressible
D. Incompressible
Which of the following fluid principles states that the external pressure applied to a confined fluid increases the pressure of every point in the fluid by an amount equal to the external pressure?
A. Pascal's principle
B. Torricelli's theorem
C. Bernoulli's theorem
D. Archimedes principle
How do you call a flow through an expanding tute at constant rate?
A. Steady uniform flow
B. Steady non-uniform flow
C. Unsteady uniform flow
D. Unsteady non-uniform flow
The friction factors for both laninar and turbuler. flows can be found plotted in which of the following?
A. Psychometric chart
B. Mollier chart
C. Moody diagram
D. Steam tables
In orifice, the coefficient of velocity is equal to which one?
A. Sum of the coefficient of discharge and the coefficient of contraction
B. Difference of the coefficient of discharge and the coefficient of contraction
C. Product of the coefficient of discharge and the coefficient of contraction
D. Ratio of the actual velocity to the theoretical velocity
The ideal flow of any fluid must fulfill which one?
A. Continuity equation
B. Newton's law of viscosity
C. Boundary layer theory
D. Bernoulli's energy equation
In an internal mouthpiece, if the jet after contraction does not touch the sides of the mouthpiece, then the mouthpiece is said to be which one?
A. Running full
B. Running free
C. Partially running full
D. Partially running free
Which one refers to the reversed Joule cycle?
A. Bell-Coleman cycle
B. Rankine cycle
C. Sterling cycle
D. Brayton cycle
Which of the following is a reason why mass is conserved in a fluid flow?
A. The fluid is incompressible
B. It is always conserved
C. The flow is adiabatic
D. The flow is isentropic
The flow in a pipe is neither laminar nor turbulent when Reynolds number is how much?
A. Less than 2000
B. More than 4000
C. Between 1 to 10
D. Between 2000 to 4000
Which one refers to the parameter f in the expression for head loss?
A. The Darcy friction factor
B. The static coefficient of friction
C. The fraction of flow that is totally turbulent
D. The height of the roughness scale in turbulent flow
The compressibility of a fluid is defined as the fractional change in the fluid volume per unit change of which one?
A. Viscosity of the fluid
B. Pressure of the fluid
C. Temperature of the fluid
D. Mass of the fluid
A water tank partially filled with water is being carried on a truck moving at a constant horizontal acceleration. What will happen to the level of the water inside the tank?
A. It will remain the same since volume is constant
B. It will fall in the back side of the tank and rise in the front side
C. It will rise in the back side of the tank and fall in the front side
D. It cannot be predicted from the data given
A manometer is used to measure which one?
A. Atmospheric pressure
B. Pressure in pipes and channels
C. Pressure in a venturimeter
D. Difference of pressures between two points in a pipe
Which one is equal to the absolute pressure?
A. Gauge pressure - vacuum pressure
B. Gauge pressure + vacuum pressure
C. Gauge pressure - atmospheric pressure
D. Gauge pressure + atmospheric pressure
How do you call the weight per unit volume of a liquid at a standard temperature and pressure?
A. Specific weight
B. Displaced weight
C. Mass.density
D. Specific gravity
The laminar friction factor of fluid flowing through a pipe is a function of all the following except which one?
A. Fluid velocity
B. Pipe roughness
C. Pipe diameter
D. Reynolds number
A piezometer tube is used only for measuring which one?
A. Low pressure
B. High pressure
C. Moderate pressure
D. Vacuum pressure
What will happen if a nozzle placed at the end of a water pipe line is discharging water?
A. It will discharge water at high velocity
B. It will discharge water at low pressure
C. It will discharge water at high pressure
D. It will discharge water at low velocity
Cavitation in fluid mechanics refers to which one?
A. The condensation of vapor into liquid due to high pressure
B. The liquid to gaseous phase transition of a fluid due to low pressure
C. The separation of the air flow behind a wing
D. The oscillations of a plate due to turbulent fluctuations
When can a uniform flow occurs?
A. When conditions do not change with time at any point
B. When the rate of change of velocity of the fluid is zero
C. When the change in transverse direction is zero
D. When at every point the velocity vector is identical in magnitude and direction for any given instant
Which one refers to the intermolecular attraction by which the particles of the same fluid are held together?
A. Cohesion
B. Adhesion
C. Capillarity
D. Tension
Which one refers to an opening in the side of a tank or vessel such that the liquid surface with the tank is below the top edge of the opening?
A. Weir
B. Notch
C. Orifice
D. Mouthpiece
Which of the following about a Newtonian fluid is most accurate?
A. Its viscosity is zero
B. Its shear stress is multivalued
C. Its shear stress is proportional to strain
D. Its shear stress is proportional to rate of strain
Materials for rain-proof coats and tents owe their water-proof properties to which one?
A. Viscosity
B. Specific gravity
C. Surface tension
D. Elasticity
Who created the impulse type turbine?
A. Pelton
B. Kaplan
C. Francis
D. Rankine
The hydraulic grade line of a pipeline denotes which of the following?
A. Total energy
B. Pressure energy
C. Potential energy
D. The sums of pressure energy and potential
Which of the following devices is used to measure atmospheric pressure?
A. Manometer
B. Hydrometer
C. Barometer
D. Anemometer
Which one refers to the statement that for a perfect incompressible liquid, flowing in a continuous stream, the total energy of a partice remains the same, while the particle moves from one point to another?
A. Continuity equation
B. Bernoulli's equation
C. Pascal's law
D. Archimedes' principle
The presence of friction in the hydraulic grade line will always cause the line to slope in what direction?
A. Downward in the direction of the flow
B. Upward in the direction of the flow
C. Vertically down
D. No direction, since the slope is horizontal only
What is the SI unit of temperature?
A. Celcius
B. Fahrenheit
C. Kelvin
D. Rankine
Which of the following is the best definition of enthalpy?
A. The amount of useful energy in a system
B. The amount of energy in a system that is no longer available to do useful work
C. The ratio of heat added to temperature change induced in a substance
D. The heat required to cause a complete conversion between two phases at a constant temperature
Which one refers to a system in which there might be an exchange in energy but not mass?
A. Open system
B. Closed system
C. Isolated system
D. Insulated system
The refrigerant flows through the coil on the back of most refrigerators. Which of the following refers to this coil?
A. Evaporator
B. Reheater
C. Intercooler
D. Condenser
What is the meaning of the term NTP?
A. Normal temperature and pressure
B. Nominal temperature and pressure
C. Normal thermodynamic properties
D. Nominal thermodynamic properties
Which one refers to the stamen that molecular weights of all gases occupy the same volume?
A. Dalton's law
B. Pascal's law
C. Joule's law
D. Avogadros' hypothesis
How do you call a substance whose temperature is less than its saturation temperature?
A. Sub-cooled liquid
B. Saturated vapor
C. Liquid and a vapor
D. Superheated vapor
Thermodynamics is a science that does not include the study of which one?
A. Energy storage
B. Energy transfer
C. Energy utilization
D. Energy transformation
Which one refers to a thermodynamic process whose deviation from equilibrium is infinitesimal all times?
A. Reversible
B. In quasiequilibrium
C. Isentropic
D. Isenthalpic
he term steady implies which one?
A. No change with time
B. No change with mass
C. No change with volume
D. No change with location
What is the process that has no heat transfer?
A. Quasistatic
B. Isothermal
C. Reversible
D. Isentropic
In flow process, neglecting KE and PE changes, -VdP represent which item?
A. Heat transfer
B. Shaft work
C. Closed system work
D. Enthalpy change
Which of the following laws states that the internal energy of a gas is a function of temperature?
A. Joule's law
B. Boyle's law
C. Regnault's law
D. Charles' law
Which one refers to the temperature when water vapor of the air begins to condense?
A. Critical point
B. Boiling point
C. Dew point
D. Freezing point
Under which of the following conditions is the law PV=nRT obeyed most closely by a real gas?
A. High pressure and high temperature
B. Low pressure and low temperature
C. High pressure and low temperature
D. Low pressure and high temperature
Which one refers to the phase change from a vapor to a liquid?
A. Condensation
B. Sublimation
C. Melting
D. Vaporization
Which one refers to a substance whose properties are uniform throughout a sample?
A. Solid
B. Ideal substance
C. Pure substance
D. Standard substance
Equilibrium conditions exist in all except which of the following?
A. In reversible processes
B. In a steady state flow process
C. In processes where driving force are infinitesimals
D. Where nothing can occur without an effect on the system's surroundings
What is the most efficient section of a channel?
A. Trapezoidal
B. Triangular
C. Rectangular
D. Square
Which one refers to the sequence of processes that eventually returns the working substance to its original state?
A. Thermodynamic cycle
B. Thermodynamic path
C. Thermodynamic phase
D. Thermodynamic property
Which of the following principles is the closest interpretation of the first law of thermodynamics for a closed system?
A. The change of total energy is equal to the rate of work performed
B. The mass within a closed control volume does not change
C. The net energy crossing the system boundary is the change in energy inside the system
D. All real processes tend toward increased entropy
What is the function of a pump or compressor?
A. To transfer heat from one fluid to another
B. To increase the total energy content of the flow
C. To extract energy from the flow
D. To exchange heat to increase energy to the flow
Which one refers to the amount of heat energy required to convert 1 kg of a substance at its melting point from the solid state to liquid state?
A. Heat of vaporization
B. Heat of saturation
C. Heat of condensation
D. Heat of fusion
Carnot cycle has maximum efficiency in what type of an engine?
A. Steam engine
B. Gas engine
C. Reversible engine
D. Well lubricated engine
What is the density of water?
A. 1 g/mL at 4°C
B. 1 g/mL at 10°C
C. 1 g/mL at 30°C
D. 1 g/mL at 50°C
Bernoulli's equation is what type of an equation?
A. It is an equation of state
B. It is a conservation. of energy equation
C. It is a momentum equation
D. It is a conservation of mass equation
Which of the following statements about entropy is not true?
A. Entropy has the units of heat capacity
B. Entropy of a crystal at 0°F is zero
C. Entropy of a mixture is greater than that of its components under the same condition
D. An irreversible process increases entropy of the universe
Which of the following statements about the Second law of Thermodynamics is not correct?
A. Heat must be rejected from a heat engine
B. The entropy of an isolated process must remain constant or rise
C. The entropy of a hot block decreases as it cools
D. Work must be input if energy is transferred from a cold body to a hot body
Properties of substances like pressure, temperature and density in thermodynamic coordinates refer to which one?
A. Path functions
B. Point functions
C. Cyclic functions
D. Real functions
Which temperature is most different from the outside temperature as measured with a conventional thermometer?
A. Wet-bulb temperature
B. Dry-bulb temperature
C. Dew-point temperature
D. Ambient temperature
What is the device used to keep moisture from passing through the system?
A. Dehydrator
B. Trap
C. Aerator
D. Humidifier
A compression-ignition cycle is modeled by which ideal cycle?
A. Otto cycle
B. Brayton cycle
C. Rankine cycle
D. Diesel cycle
Boyles law for an ideal gas deals with the relationship between which one
A. Mass and volume at constant temperature
B. Pressure and volume at constant temperature
C. Volume and temperature at constant pressure
D. Pressure and temperature at constant volume
Enthalpy of an ideal gas is a function only of which one?
A. Internal energy
B. Entropy
C. Temperature
D. Pressure
The first law of thermodynamics is based on which of the following principles?
A. Conservation of mass
B. Enthalpy-entropy relationship
C. Action-reaction
D. Conservation of energy
Which one refers to a system in which there is no exchange of matter with the surroundings or mast does not cross its boundaries?
A. Open system
B. Closed system
C. Isolated system
D. Non-flow system
For an irreversible process, what is true about the total change in entropy of the system and surroundings?
A. dS > 0
B. dS < 0
C. dS = ∞
D. dS = 0
Which one cannot be directly determined with the use of a pitot tube?
A. Stagnation pressure
B. Discharged rate
C. Total pressure
D. Velocity of a flowing liquid
Which one is true about the First law of Thermodynamics if kinetic and potential energy changes are neglected?
A. Heat transfer equals the work done for a process
B. Heat transfer minus work equals internal energy for a process
C. Net heat transfer equals the net work for a cycle
D. Net heat transfer minus net work equals internal energy change for a cycle
Which one refers to a process that is adiabatic and reversible?
A. Isobaric
B. Isentropic
C. Isothermal
D. Isometric
The engines on a commercial jet aircraft operate on which of the following basic cycles?
A. Otto cycle
B. Diesel cycle
C. Brayton cycle
D. Carnot cycle
Which one of the following gases is nearest to be an ideal gas?
A. Helium
B. Hydrogen
C. Oxygen
D. Nitrogen
What is a constant pressure process called?
A. Adiabatic
B. Isobaric
C. Isothermal
D. Isentropic
