Description : What is the real or imaginary surface that separates the system from its surroundings? A. Division B. Wall C. Boundary D. Interface
Last Answer : Boundary
Description : It is a region enclosed by specified boundaries, which may be imaginary, either fixed or moving a. Isolated system b. Open system c. System d. None of the above
Last Answer : System
Description : An isolated system is one in which (a) mass does not cross boundaries of the system, though energy may do so (b) neither mass nor energy crosses the boundaries of the system (c) both ... system (d) mass crosses the boundary but not the energy (e) thermodynamic reactions do not occur.
Last Answer : Answer : b
Description : An open system is one in which (a) mass does not cross boundaries of the system, though energy may do so (b) neither mass nor energy crosses the boundaries of the system (c) both energy ... system (d) mass crosses the boundary but not the energy (e) thermodynamic reactions do not occur.
Last Answer : Answer : c
Description : A closed system is one in which (a) mass does not cross boundaries of the system, though energy may do so (b) mass crosses the boundary but not the energy (c) neither mass nor energy ... (d) both energy and mass cross the boundaries of the system (e) thermodynamic reactions take place.
Last Answer : Answer : a
Description : The contact surface shared by both the system and the surroundings is called _________. a. wall b. boundary c. interface d. intersection
Last Answer : boundary
Description : A system having a rigid boundary that energy, work and mass does not cross its boundaries a. Specific Heat b. Specific Gravity c. Isolated System d. Enthalpy
Last Answer : Isolated System
Description : A system whose boundary does not allow the exchange of either matter or energy with the surrounding a. open system b. closed system c. isolated system d. none of the above
Last Answer : isolated system
Description : How are thermodynamic properties classified? A. Physical and chemical B. Intensive and extensive C. Real and imaginary D. Homogeneous and heterogeneous
Last Answer : Intensive and extensive
Description : A system which consists of fixed amount of mass and no mass can cross its boundary called _____. A. Equilibrium system B. Thermal equilibrium system C. Open system D. Closed system
Last Answer : Closed system
Description : What is the mass or region outside the system called? A. Surroundings B. Boundary C. Volume D. Environment
Last Answer : Surroundings
Description : Gas is enclosed in a cylinder with a weighted piston as the stop boundary. The gas is heated and expands from a volume of 0.04 m^3 to 0.10 m^3 at a constant pressure of 200kPa.Calculate the work done by the system. A. 8 kJ B. 10 kJ C.12 kJ D.14 kJ Formula: W = p(V2-V1)
Last Answer : 12 kJ
Description : A gas is enclosed in a cylinder with a weighted piston as the top boundary. The gas is heated and expands from a volume of 0.04 m3 to 0.10 m3 at a constant pressure of 200 kPa. Find the work done on the system. a. 5 kJ b. 15 kJ c. 10 kJ d. 12 kJ
Description : What is defined a region in space chosen for study? A. Surroundings B. System C. Boundary D. Volume
Description : The first law of thermodynamics may be expressed in the following equivalent a. the net heat transfer id equal to the network b. the sum of the total energy forms leaving the system boundary is ... neither be created nor destroyed but only converted from one form to another d. all of the above
Last Answer : all of the above
Description : What refers to a system in which there is a flow of mass across its boundaries? a. Open system b. Closed system c. Isolated system d. Non-flow system
Last Answer : Open system
Description : What system in which there is no exchange of matter with the surrounding or mass does not cross its boundaries? a. Open system b. Closed system c. Isolated system d. Non-flow system
Description : What system in which neither mass nor energy cross the boundaries and is not influenced by the surroundings? a. Closed system b. Open system c. Isolated system d. All of these
Last Answer : Isolated system
Description : Is a thermodynamic system that operates continuously with only energy (heat and work) crossing its boundaries? a. Heat Engine b. Heat Reservoir c. Heat Source d. Heat Sink
Last Answer : Heat Engine
Description : A classification of a system in which mass crosses its boundaries. a. Closed System b. Open System c. Isolated System d. None of the above
Last Answer : Open System
Description : A classification of system in which mass does not cross its boundaries. a. Nonflow System b. Open System c. Closed System d. None of the above
Last Answer : Closed System
Description : Only energy can cross the boundaries. a. Closed system b. Open system c. Isolated system d. Isoenergetic system
Description : An open system may refer to ______. A. Control mass B. Control volume C. Control energy D. Control temperature
Last Answer : Control volume
Description : A closed system may refer to ______. A. Control mass B. Control volume C. Control energy D. Control temperature
Last Answer : Control mass
Description : A device that violates either the first law of thermodynamics or the second law of thermodynamics is known as _____. A. Ambiguous machine B. Universal machine C. Perpetual-motion machine D. Unique machine
Last Answer : Perpetual-motion machine
Description : Anything that is outside the system boundary is called ________. a. Surrounding b. Natural Environment c. Closed System d. Open System
Last Answer : Surrounding
Description : A system in which even energy is not allowed to cross the boundary is called ____. A. Closed system B. Exclusive system C. Isolated system D. Special system
Description : At same temperatures, the radiation emitted by all real surfaces is ______ the radiation emitted by a black body. A. Less than B. Greater than C. Equal to D. Either less than or greater than
Last Answer : Less than
Description : Without electrical, mechanical, gravitational, surface tension and motion effects, a system is called _____ system. A. Simple B. Simple compressible C. Compressible D. Independent
Last Answer : Simple compressible
Description : What do you call a system in which there is a flow of matter through the boundary? a. Closed system b. Open system c. Isolated system d. All of these
Description : Work done in pushing a fluid across a boundary, Usually into or out of a system a. Flow Work b. Flow Energy c. Both a & b d. None of the above
Last Answer : Both a & b
Description : The flow energy of 5 ft3 of a fluid passing a boundary to a system is 80,000 ft-lb. Determine the pressure at this point. a. 222 psi b. 333 psi c. 444 psi d. 111 psi formula: Ef= pV
Last Answer : 111 psi
Description : The flow energy of 150 L of a fluid passing a boundary to a system is 110 kJ. Determine the pressure at this point a. 733.33 kPa b. 833.33 kPa c. 933.33 kPa d. 633.33 kPa
Last Answer : 733.33 kPa
Description : The entropy change of a system during a process is equal to the net entropy transfer through the system boundary and the entropy generated within the system . This statement is known as: A. Entropy ... B. Entropy change of a system C. Entropy balance relation D. Third law of thermodynamics
Last Answer : Entropy balance relation
Description : What is a form of mechanical work which is related with the expansion and compression of substances? A. Boundary work B. Thermodynamic work C. Phase work D. System work
Last Answer : Boundary work
Description : A closed system is one in which heat and work crosses the boundary of the system but the mass of the working substance does not crosses the boundary of the system. A. Yes B. No
Last Answer : Answer: A
Description : _____ 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. a. Entrophy b. Enthalpy c. Specific Heat d. None of the above
Last Answer : Entrophy
Description : Which of the following statements is TRUE for an ideal gas, but not for a real gas? A. PV = nRT B. An increase in temperature causes an increase in the kinetic energy of the gas C. The ... same as the volume of the gas as a whole D. No attractive forces exists between the molecule of a gas
Last Answer : PV = nRT
Description : An ideal gas as compared to a real gas at very high pressure occupies (a) more volume (b) less volume (c) same volume (d) unpredictable behaviour (e) no such correlation.
Description : The rate at which this is quantity passes through a fixed boundary per unit time a. Flux b. Existence c. Irradiance d. All of these
Last Answer : All of these
Description : A control volume refers to what? a. A fixed region in space b. A reversible process c. an isolated system d. a specified mass
Last Answer : A fixed region in space
Description : What is referred to by control volume? a. An isolated system b. Closed system c. Fixed region in space d. Reversible process only
Last Answer : Fixed region in space
Description : Open system is also known as _________. a. isolated system b. closed container c. control mass d. control volume
Last Answer : control volume
Description : A closed system is also known as _________. a. isolated system b. closed container c. control mass d. control volume
Last Answer : control mass
Description : Is a steady flow process at total constant pressure through a control volume for which there is no heat? a. Adiabatic Saturation Process b. Dew point c. Adiabatic Ratio d. None of the above
Last Answer : Adiabatic Saturation Process
Description : A Thermodynamic Term That refers to any fixed region in a space a. Control Volume b. Volume c. Density d. Natural Gas
Last Answer : Control Volume
Description : What remains constant during a steady-flow process? A. Mass B. Energy content of the control volume C. Temperature D. Mass and energy content of the control volume
Last Answer : Mass and energy content of the control volume
Description : What is defined as a process during which a fluid flows through a control volume steadily? A. Transient-flow process B. Steady and uniform process C. Uniform-flow process D. Steady-flow process
Last Answer : Steady-flow process
Description : What is a process with identical end states called? A. Cycle B. Path C. Phase D. Either path or phase
Last Answer : Cycle
Description : An adiabatic process in which there is no change in system enthalpy but for which there is a significant decrease in pressure is called _____. A. Isochoric process B. Isobaric process C. Throttling process D. Quasistatic process
Last Answer : Throttling process