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Homework answers / question archive / University of Alabama, Birmingham - ELC 101 1)Ability to do work Power Energy Work None of the above Amount of heat needed to rate the temperature of a substance by 1°C Heat Exchange Heat Engine Specific Heat None of the above Study of transformation of heat energy to mechanical energy to other forms of energy

University of Alabama, Birmingham - ELC 101 1)Ability to do work Power Energy Work None of the above Amount of heat needed to rate the temperature of a substance by 1°C Heat Exchange Heat Engine Specific Heat None of the above Study of transformation of heat energy to mechanical energy to other forms of energy

Electrical Engineering

University of Alabama, Birmingham - ELC 101

1)Ability to do work

    1. Power
    2. Energy
    3. Work
    4. None of the above
  1. Amount of heat needed to rate the temperature of a substance by 1°C
    1. Heat Exchange
    2. Heat Engine
    3. Specific Heat
    4. None of the above
  2. Study of transformation of heat energy to mechanical energy to other forms of energy.
    1. Thermodynamics
    2. Physics
    3. Mechanics
    4. None of the above
  3. Heat cannot be created, nor destroyed, but it can be changed from one form to another. The energy in the universe remains constant.
    1. 1st Law of Energy Conservation
    2. 2nd Law of Energy Conservation
    3. 3rd Law of Energy Conservation
    4. None of the above
  4. Quantities that describe both magnitude & direction
    1. Physical Quantity
    2. Scalar Quantity
    3. Vector Quantity
    4. None of the above
  5. The sum of energies of all the molecules in a system, energies that appear in several complex forms.
    1. External Energy
    2. Internal Energy
    3. Kinetic Energy
    4. None of the above
  6. The value of atomic charge e is
    1. 1.60210 x 10-19 coulomb
    2. 1.68910 x 10-19 coulomb
    3. 1.20160 x 1019 coulomb
    4. None of the above
  7. 8. p1V1= p2V2
    1. Charle's Law
    2. Boyle's Law
    3. Ideal Gas Law
  8. .
  9. d. None of the above
 
  1. Thermometer
  2. b. Barometer
  3. c. Manometer
  4. d. None of the above
  5. Work done in pushing a fluid across a boundary, Usually into or out of a system
    1. Flow Work
    2. Flow Energy
    3. Both a & b
    4. None of the above
  6. Which is not true about Heat (Q):
    1. Q is positive when heat is added to the body or system
    2. Q is negative when heat is rejected by the body or
  7. system
  8. c. Q is positive when heat is rejected by the body or system
  9. d. None of the above
  10. The standard reference atmospheric pressure
    1. 760 mmHg
    2. 1 atm
    3. 14.696 psia
    4. All of the above
    5. is that property of a substance which remains constant if no heat enters or leaves the substance, while it does work or alters its volume, but which increases or diminishes should a small amount of heat enter or leave.
  11. Entrophy
  12. Enthalpy
  13. Specific Heat
  14. None of the above
  15. The acceleration of a particular body is directly proportional to the resultant force acting on it & inversely proportional to its mass.
    1. Pascal's Law
    2. Joule's Law
    3. Newton's Law
    4. None of the above
  16. Mass (not weight) per unit volume
    1. Specific Weight
    2. Specific Volume
    3. Density
    4. None of the above
  17. Composite property applicable to all fluids
    1. Entropy
    2. Enthalpy
    3. Specific Heat
    4. None of the above
  18. A classification of system in which mass does not cross its boundaries.
    1. Nonflow System
    2. Open System
    3. Closed System
    4. Zeroth Law
    5. Gas Law

 

  1. Gas being heated at constant volume is undergoing the process of.
    1. isometric
    2. specific heat
    3. enthalpy
    4. isothermal
  2. The heat per unit mass per degree change in temperature
    1. specific heat
    2. isometric
    3. conservation of energy
    4. none of the above
  3. A unit of pressure used in high vacuum technology, which is equal to 1mmhg.
    1. specific heat
    2. isometric
    3. isobaric
    4. torr
  4. The gas constant is equal to
    1. Cp – Cv
    2. Cp + Cv
    3. Cp – Cv + k
    4. None of the above
  5. The 1st Law of Thermodynamics on what principle?
    1. Conservation of Energy
    2. Conservation of mass
    3. Enthalpy
    4. Isometric
  6. A system having a rigid boundary that energy, work and mass does not cross its boundaries
    1. Specific Heat
    2. Specific Gravity
    3. Isolated System
    4. Enthalpy
  7. Sum of the internal energy of a substance and the product of pressure and volume.
    1. Specific Heat
    2. Specific Gravity
    3. Isolated System
    4. Enthalpy
  8. The ratio of the weight of a substance to the weight of some standard substance is called?
    1. Specific Heat
    2. Specific Gravity
    3. Isothermal
    4. Specific Weight
  9. Specific heat capacity in SI unit.
    1. kJ / kg.k
    2. kJ / kg
    3. kN / kg
    4. None of the above
  10. The Law of Thermodynamics that provides the basis for measuring the thermodynamic property of temperature.
    1. Charle’s Law
    2. Boyle’s Law
    3. Isothermal Process
 
  1. 28. The pressure of the confined gas is held constant, the volume directly proportional to the absolute temperature.
    1. Charle’s Law
    2. Boyle’s Law
    3. Zeroth Law
    4. Gas Law
  2. Regardless of the process, the change in enthalpy firm moles of ideal gas is
    1. Heat
    2. Enthalpy
    3. Entropy
    4. Density
  3. Ideal process are        process
    1. Irreversible
    2. Reversible
    3. Isothermal
    4. Isometric
  4. A state occurs when a system is in equilibrium
    1. Natural Environment
    2. Closed System
    3. Surrounding
    4. Isentropic
  5. A state occurs in isentropic process
    1. The change in entropy is 0
    2. The change in entropy is 1
    3. The change in enthalpy is 0
    4. The change in enthalpy is 1
  6. The SI unit of mass
    1. kg
    2. g
    3. N
    4. None of the above
  7. Anything that is outside the system boundary is called
    1. .
  8. Surrounding
  9. Natural Environment
  10. Closed System
  11. Open System
  12. A Thermodynamic Term That refers to any fixed region in a space
    1. Control Volume
    2. Volume
    3. Density
    4. Natural Gas
  13. The process that has no heat transfer
    1. Density
    2. Isentropic Process
    3. Isometric Process
    4. Adiabatic
  14. Another name of reversible adiabatic process
    1. Isentropic Process
    2. Isometric Process
    3. Isobaric Process
  15. b. Double Staging
  16. c. Multistaging

 

    1. Mass
    2. Weight
    3. Density
    4. Volume
    5. of a body means the force of the gravity Fg on the body
  1. Mass
  2. Weight
  3. Density
  4. Volume
  5. The law of conservation of mass states that  .
    1. mass is indestructible
    2. mass is destructible
    3. mass is indestructible
    4. none of the above
    5. is the energy stored within a body or substance by virtue of the activity and configuration of its molecules.
  6. Internal Energy
  7. External Energy
  8. Kinetic Energy
  9. Potential Energy
  10. The Product of the displacement of the body and the component if the force in the direction of the displacement.
    1. Nonflow Work
    2. Flow Work
    3. Work
    4. None of the above
  11. Is the energy in transit (on the move) from the one body or system to another solely because of a temperature between the bodies or systems.
    1. Work
    2. Heat
    3. Energy
    4. None of the above
  12. A classification of a system in which mass crosses its boundaries.
    1. Closed System
    2. Open System
    3. Isolated System
    4. None of the above
  13. The SI unit of pressure
    1. Pa
    2. N
    3. J
    4. None of the above
  14. The volume of a confined gas is held constant, the pressure is directly proportional to the absolute temperature.
    1. Charle’s Law
    2. Boyle’s Law
    3. Joule’s Law
    4. Specific Heat
  15. The compression of the gas in two or more cylinders in place of a single cylinder compressor
    1. Single Staging
  16. only energy (heat and work) crossing its boundaries?
    1. Heat Engine
 
  1. None of the above
  2. Is defined as the ratio of the actual pressure of the vapor
    1. Relative Humidity
    2. Humidity Ratio
    3. Dew Point
    4. Adiabatic Saturation
  3. Heat engine deriving its power from the energy liberated by the explosion of a mixture of some hydrocarbon, in a gaseous or vaporized form.
    1. Dual Combustion Engine
    2. Internal Combustion Engine
    3. External Combustion Engine
    4. None of the above
  4. Also called absolute humidity and specific humidity.
    1. Related humidity
    2. Humidity ratio
    3. Dew point
    4. Adiabatic ratio
  5. Is a steady flow process at total constant pressure through a control volume for which there is no heat?
    1. Adiabatic Saturation Process
    2. Dew point
    3. Adiabatic Ratio
    4. None of the above
  6. Fuels that may classified conveniently in solid, liquid and gaseous.
    1. Unleaded fuel
    2. Diesel fuel
    3. Fossil fuel
    4. All of the above
  7. Is a general name, without specific meaning unless the way in which it is measured or define by the context.
    1. Natural Value
    2. Heating Value
    3. Burning Value
    4. Internal Value
  8. Is the force of gravity on unit volume?
    1. Specific Weight
    2. Specific Heat
    3. Specific Pressure
    4. Specific Volume
  9. Give a reading as the length of some liquid column: water, alcohol, etc.
    1. Banometer
    2. Nanometer
    3. Thermometer
    4. Manometer
  10. If any one or more properties of a system change, the system is said to have undergone a           .
    1. Cycle
    2. System
    3. Process
    4. None of the above
  11. Is a thermodynamic system that operates continuously with
  12. d) Wet Vapor
    1. is the temperature at which liquids start to boil or the temperature at which vapors begin to condense.
  13. Saturation Temperature
  14. Sub cooled Liquid
  15. Compressed Liquid
  16. Saturated Liquid
    1. is one which has a temperature lower than the saturation temperature corresponding to the existing pressure.
  17. Saturation Temperature
  18. Sub cooled Liquid
  19. Compressed Liquid
  20. Saturated Liquid
    1. is one which has a pressure higher than the saturation pressure corresponding to the existing temperature.
  21. Saturation Temperature
  22. Sub cooled Liquid
  23. Compressed Liquid
  24. Saturated Liquid
    1. is a liquid at the saturations which has temperature equal to the boiling point corresponding to the existing pressure.
  25. Saturation Temperature
  26. Sub cooled Liquid
  27. Compressed Liquid
  28. Saturated Liquid
    1. is the name given to a gaseous phase that is in contact with the liquid phase, or that is in the vicinity of a state where some of it might be condensed.
      1. Vapor
      2. Saturated Vapor
      3. Superheated Vapor
      4. Wet Vapor
    2. is a vapor at the saturation conditions (saturation temperature and saturation pressure).
      1. Vapor
      2. Saturated Vapor
      3. Superheated Vapor
      4. Wet Vapor
    3. is a vapor having a temperature higher than the saturation temperature corresponding to the existing pressure.
      1. Vapor
      2. Saturated Vapor
      3. Superheated Vapor
      4. Wet Vapor
    4. is a combination of saturated vapor and saturated liquid.
      1. Vapor
      2. Saturated Vapor
      3. Superheated Vapor
    5. Degrees of Superheat, °SH
    6. Degrees of Sub cooled, °SB
 
  1. highest temperature at which liquid and vapor can coexist in equilibrium.
      1. Critical Point
      2. Boiling Point
      3. Quality Point
      4. None of the above
  2. Heat that cause change in temperature at without a change in phase.
      1. Sensible Heat
      2. Latent Heat
      3. Thermo Heat
      4. None of the above
  3. Heat that cause change in phase without a change in temperature.
      1. Sensible Heat
      2. Latent Heat
      3. Thermo Heat
      4. None of the above
  4. What is the formula to convert °C to °F?
      1. °F = °C + 273
      2. °F = 5/9 (°C - 32)
      3. °F = 9/5 (°C)+32
      4. None of the above
  5. What is the formula to convert °F to °C?
      1. °C = °F + 273
      2. °C = 5/9 (°F - 32)
      3. °C = 9/5 (°F)+32
      4. None of the above
    1. is the base unit of thermodynamics temperature.
      1. Celsius
      2. Fahrenheit
      3. Kelvin
      4. None of the above
    2. is the unit of force.
      1. Newton
      2. Pascal
      3. Hertz
      4. Joule
    3. is the unit of pressure and stress.
      1. Newton
      2. Pascal
      3. Hertz
      4. Joule
    4. is the difference between the actual temperature of superheated vapor and the saturation temperature for the existing pressure.
      1. Degrees of Superheat, °SH
      2. Degrees of Sub cooled, °SB
      3. Both a and b
      4. None of the above

 

 

 

 

 

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