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Energy conversion efficiency: Quiz
  
  

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Question 1: Energy conversion efficiency is the ratio between the useful output of an energy conversion machine and the input, in ________ terms.
EnergyTimeForceUniverse

Question 2: This is because the apparatus recovers part of the ________, which is not included in the definition of the lower heating value of fuel.
HalogenNoble gasEnthalpy of vaporizationActinoid

Question 3: The useful output may be electric power, mechanical work, or ________.
TemperatureInternal energyHeatEnergy

Question 4: Generally, energy conversion efficiency is a ________ number between 0 and 1.0, or 0 to 100%.
Reynolds numberFluid dynamicsKeulegan–Carpenter numberDimensionless quantity

Question 5: the heat obtained by fuel ________ (oxidation), measured so that the water vapor produced remains gaseous, and is not condensed to liquid water.
OxygenInternal combustion engineFireCombustion

Question 6: All or part of the heat produced from burning a fuel may become rejected waste heat if, for example, work is the desired output from a ________.
Hot air engineThermodynamic cycleInternal combustion engineHeat engine

Question 7: Even though the definition includes the notion of usefulness, efficiency is considered a technical or ________ term.
PhysicsQuantum mechanicsUniverseParticle physics

Question 8: Using the LHV, a ________ can achieve a "heating efficiency" in excess of 100% which violates the first law of thermodynamics.
Polyvinyl chlorideUnited StatesCondensing boilerUnited Kingdom
















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