a. A house | ||
b. A physical property of a system that is independent of the system size and mass | ||
c. An extensive property | ||
d. A product of two extensive properties |
a. A traditional unit of energy equal to 1055 J | ||
b. A traditional unit of energy equal to 1055 N | ||
c. A unit of energy that stand for British Transition Unit | ||
d. A unit of energy that stands for British Thermal Union |
a. In a closed system, no mass may be transferred in or out of the system boundaries. | ||
b. In a closed system, no energy may be transferred in or out of the system boundaries. | ||
c. In a closed system, both mass and energy cannot be transferred in or out of the system boundaries. | ||
d. In a closed system, no work may be transferred in or out of the system boundaries. |
a. A specific property | ||
b. A physical property of a system that depends on the system size and mass | ||
c. An intensive property | ||
d. A product of two intensive properties |
a. 203°K | ||
b. 294°K | ||
c. 270°K | ||
d. 343°K |
a. 303°K | ||
b. 260°K | ||
c. 533°K | ||
d. 500°K |
a. A series of identical thermodynamic processes | ||
b. A thermodynamic process | ||
c. A system in equilibrium | ||
d. A series of thermodynamic processes that return to the first state of the first process |
a. Internal energy | ||
b. Temperature | ||
c. Heat capacity | ||
d. Entropy |
a. kg/m | ||
b. inch/lb | ||
c. kg | ||
d. m |
a. Boyle's law | ||
b. Ideal gas law | ||
c. Newton’s second law | ||
d. f(P,V,T) = 0 |
a. 1.5 m3 | ||
b. 1.1 m3 | ||
c. 0.1 m3 | ||
d. 1.9 m3 |
a. Vapor | ||
b. Liquid-vapor mixture | ||
c. Liquid | ||
d. Solid |
a. Vapor | ||
b. Liquid-vapor mixture | ||
c. Liquid | ||
d. Solid |
a. 0.52 kg/s | ||
b. 0.152 kg/s | ||
c. 0.258 kg/s | ||
d. 1.65 kg/s |
a. 280°C | ||
b. 100°C | ||
c. 300°C | ||
d. 250°C |
a. 300°C | ||
b. 30°K | ||
c. 30°C | ||
d. 300°K |
a. 150°C | ||
b. 200°K | ||
c. 202°C | ||
d. 100°K |
a. 3.25 MPa | ||
b. 4.76 MPa | ||
c. 1.76 bar | ||
d. 15 atm |
a. 2 T | ||
b. 1.5 T | ||
c. 0.6 T | ||
d. 0.5 T |
a. 100°C and 1 atm | ||
b. 0°K and 611 Pa | ||
c. 273°K and 1 MPa | ||
d. 273°K and 611 Pa |
a. A process in which the system is perfectly insulated and heat transfer is zero | ||
b. A process in which the temperature stays constant | ||
c. A process in which the pressure stays constant | ||
d. A process in which the volume of the system stays constant |
a. 29.5 kJ | ||
b. 19.5 kJ | ||
c. 49.5 kJ | ||
d. 89.5 kJ |
a. Heat | ||
b. Work | ||
c. Potential energy | ||
d. Entropy |
a. The transfer of thermal energy between regions of matter due to a temperature gradient | ||
b. The transfer of energy due to bulk movement of liquids | ||
c. The transfer of electrical energy from one object to another | ||
d. The transfer of kinetic energy due to collision |
a. Radiation, friction, and convection | ||
b. Convection, isobaric, and radiation | ||
c. Conduction, isothermal, and isentropic | ||
d. Conduction, convection, and radiation |
a. 70°C | ||
b. 50°C | ||
c. 30°C | ||
d. 20°C |
a. 35.9°C | ||
b. 75.2°C | ||
c. 125.6°C | ||
d. 25.4°C |
a. 219 kg | ||
b. 299 kg | ||
c. 179 kg | ||
d. 359 kg |
a. 1223 kg | ||
b. 142 kg | ||
c. 697 kg | ||
d. 47 kg |
a. Exergy | ||
b. Entropy | ||
c. Energy | ||
d. Enthalpy |
a. 256 kJ | ||
b. 22 kJ | ||
c. 742 kJ | ||
d. 1920 kJ |
a. -2.31 kJ | ||
b. 4.52 kJ | ||
c. -6.53 kJ | ||
d. -3.55 kJ |
a. 610 kJ/kg | ||
b. 510 kJ/kg | ||
c. 710 kJ/kg | ||
d. 210 kJ/kg |
a. Heat conduction happens only on solid materials. | ||
b. Heat convection is independent of fluid velocity. | ||
c. Heat transfer due to radiation increases linearly with temperature. | ||
d. None of the above |
a. The first law of thermodynamics is an expression of the principle of conservation of energy. | ||
b. The first law of thermodynamics states that energy can be transformed but cannot be created nor destroyed. | ||
c. The internal energy of an isolated system is not constant. | ||
d. Changes in internal energy (U) are due to a combination of heat (Q) added to the system and work done by the system (W). |
a. 3.6 kJ | ||
b. 9.6 kJ | ||
c. 6.4 kJ | ||
d. 5.1 kJ |
a. The temperature of the system increases. | ||
b. The temperature of the system decreases. | ||
c. The internal energy of the system stays constant. | ||
d. No energy is exchanged between the system and the surrounding. |
a. For any spontaneous process, the entropy of the universe increases. | ||
b. Entropy cannot be created or destroyed. | ||
c. Energy cannot be created or destroyed. | ||
d. Energy = internal energy + kinetic energy + potential energy. |
a. Heat is always transferred from a hot object to a colder object. | ||
b. Heat transfer occurs when the temperature of a system is different from the temperature of its surroundings. | ||
c. The three major modes of heat transfer are conduction, convection, and radiation. | ||
d. Internal energy of a system can only be changed due to heat transfer. |
a. It is not possible to build Carnot power cycle in practice. | ||
b. A Carnot power cycle consists of 2 isentropic processes and 2 isothermal processes. | ||
c. No engine operating between two heat reservoirs can be more efficient than a Carnot engine operating between those same reservoirs. | ||
d. The thermal efficiency of a Rankine cycle can be made to be equal to that of a Carnot power cycle operating between the same cold and hot reservoirs. |
a. 0.13 | ||
b. 0.52 | ||
c. 0.22 | ||
d. 0.76 |
a. Exergy is the minimum useful work possible during a process that brings the system into equilibrium with a heat reservoir. | ||
b. Exergy is always destroyed in a process involving a temperature change. | ||
c. Exergy is equivalent to entropy. | ||
d. Exergy never reaches zero even after the system and surroundings reach equilibrium. |
a. For any spontaneous process, the entropy of the universe increases. | ||
b. Entropy cannot be created or destroyed. | ||
c. Energy cannot be created or destroyed. | ||
d. Energy = internal energy + kinetic energy + potential energy. |
a. Two reversible isothermal processes and two adiabatic processes | ||
b. Two irreversible isothermal processes and two adiabatic processes | ||
c. Two isobaric processes and two adiabatic processes | ||
d. Two reversible isentropic processes and two adiabatic processes |
a. T(s1 + s2)/2 | ||
b. T (s2 - s1) | ||
c. T (s1 - s2) | ||
d. T s1/s2 |
a. Entropy expresses the degree of disorder in a system. | ||
b. Entropy of an isolated system never decreases. | ||
c. Entropy has the dimension of energy divided by temperature and a unit of joules per kelvin (J/K). | ||
d. Entropy measures the energy available for useful work in a thermodynamic process. |
a. 75% | ||
b. 40% | ||
c. 65% | ||
d. 50% |
a. Energy | ||
b. Entropy | ||
c. Work | ||
d. Exergy |
a. 0.123 | ||
b. 0.232 | ||
c. 0.517 | ||
d. 0.721 |
a. 75% | ||
b. 35% | ||
c. 45% | ||
d. 25% |
a. Isobaric | ||
b. Isothermal | ||
c. Adiabatic expansion | ||
d. Isochoric |
a. 76% | ||
b. 46% | ||
c. 5% | ||
d. 29% |
a. 0.31 | ||
b. 0.71 | ||
c. 0.41 | ||
d. 0.61 |
a. Carnot | ||
b. Brayton | ||
c. Diesel | ||
d. Otto |
a. Carnot | ||
b. Brayton | ||
c. Diesel | ||
d. Otto |
a. Rankine | ||
b. Lenoir | ||
c. Diesel | ||
d. Otto |
a. 6.3% | ||
b. 17.2% | ||
c. 15.3% | ||
d. 20.2% |
a. 1 | ||
b. 0.5 | ||
c. 2 | ||
d. 4 |
a. 1.693 kJ/kg-K | ||
b. 2.693 kJ/kg-K | ||
c. 3.693 kJ/kg-K | ||
d. 0.693 kJ/kg-K |
a. 30% | ||
b. 50% | ||
c. 71% | ||
d. 60% |
a. 2.0 MJ | ||
b. 1.5 MJ | ||
c. 25.3 MJ | ||
d. 2.8 MJ |
a. 2.4% | ||
b. 25% | ||
c. 3.8% | ||
d. 5.2% |
a. 3.5 kJ | ||
b. 20 kJ | ||
c. 38 kJ | ||
d. 336 kJ |
a. 1.36 kW | ||
b. 2.25 kW | ||
c. 3.10 kW | ||
d. 0.53 kW |
a. 0.5 m3 | ||
b. 2 m3 | ||
c. 1 m3 | ||
d. 0.1 m3 |
a. 24% | ||
b. 5% | ||
c. 72% | ||
d. 10% |
a. 394 kJ/kmol K | ||
b. 19 kJ/kmol K | ||
c. 1.5 kJ/kmol K | ||
d. 80 kJ/kmol K |
a. 1113 kJ | ||
b. 2312 kJ | ||
c. 52 kJ | ||
d. 4905 kJ |
a. 6 kJ | ||
b. 600 kJ | ||
c. 0.6 kJ | ||
d. 6000 kJ |