Which one is the correct relation between energy efficiency ratio EER and coefficient of performance COP ?
AEER = 2.34COP
BEER = 3.24COP
CEER = 3.42COP
DEER = 4.23COP
ESAS · Question Bank
Thermodynamics
308 of 308 questions match · page 13 of 16. Answer in your head first, then check the solution.
The coefficient of performance is the ratio of:
Apower consumption in watts and heat absorbed per hour
Bheat absorbed per hour and the power consumption in watts
Cwork required and the absorbed heat
Dabsorbed heat and the work required
What predicts the approximate molar specific heat at high temperatures from the atomic weight?
AThird law of thermodynamics
BLaw of Dulong and Petit
CMollier diagram
DPressure-enthalpy diagram
Considering one mole of any gas, the equation of state of ideal gases is simply the ______ law
AGay-Lussac
BDulong and Petit
CAvogadro's
DHenry's
An ideal gas whose specific heats are constant is called __________
Aperfect gas
Bnatural gas
Cartificial gas
Drefined gas
What are the assumptions of the kinetic gas theory?
AGas molecules do not attract each other
BThe volume of the gas molecules is negligible compared to the volume of the gas
CThe molecule behave like hard spheres
Dall of these
"The total volume of a mixture of nonreacting gases is equal to the sum of the partial volumes" This statement is known as _____________
ALaw of Dulong and Petit
BMaxwell-Boltzmann law
CAmagat's law
DAvogadro's law
An adiabatic process in which there is no change in system enthalpy but for which there is a significant decrease in pressure is called _________
Aisochoric process
Bisobaric process
Cthrottling process
Dquasistatic process
What is defined as the ratio of the change in temperature to the change in pressure when a real gas is throttled?
ARankine coefficient
BKelvin coefficient
CMaxwell-Boltzmann coefficient
DJoule-Thomson coefficient
The low-temp reservoir of the heat reservoirs is known as ________
Asource reservoir
Bheel reservoir
Ctoe reservoir
Dsink reservoir
A _______ is a flow in which the gas flow is adiabatic and frictionless and entropy change is zero
Aisentropic flow
Bisobaric flow
Csteady flow
Duniform flow
What refers to the minimum temperature at which combustion can be sustained?
ABurn temperature
BKindle temperature
CSpark temperature
DIgnition temperature
What law predicts the dew point of moisture in the fuel gas?
ADalton's law
BLaw of Dulong and Petit
CRingelman law
DAmagat's law
What law states that one energy form can be converted without loss into another form?
AAmagat's law
BJoule's law
CLussac's law
DHenry's law
Which is NOT a correct statement?
AA superheated vapor will not condense when small amount of heat are removed
BAn ideal gas is a gas that is not a superheated vapor
CA saturated liquid can absorb as much heat as it can without vaporizing
DWater at 1 atm and room temperature is subcooled
In thermodynamics, we focus our attention on which form of energy?
AKinetic
BPotential
CInternal
DTotal
When two bodies, isolated from other environment, are in thermal equilibrium with a third body, the two are in thermal equilibrium with each other. What do you call this statement?
AZeroth law of thermodynamics
BFirst law of thermodynamics
CSecond law of thermodynamics
DThird law of thermodynamics
In thermodynamics, our attention is focused on which form of energy?
AKinetic energy
BInternal energy
CPotential energy
DTotal energy
The thermodynamic statement of the conservation of energy of a system is the
AFirst law
BSecond law
CThird law
DZeroth law
Which of the following would be considered a system rather than a control volume?
AA pump
BA tire
CA pressure cooker
DA turbine