The change that a system undergoes from one equilibrium state to another is known as:
APath
BProcess
CEnthalpy change
DEntropy change
ESAS · Question Bank
Thermodynamics
274 of 308 questions match · page 3 of 14. Answer in your head first, then check the solution.
What system is one in which neither mass nor energy crosses the boundaries and is not influenced by the surroundings?
AClosed system
BOpen system
CIsolated system
DAll of these
What is referred to by control volume?
AAn isolated system
BA closed system
CA fixed region in space
DA reversible process only
A Bell-Coleman cycle is the reverse of which of the following cycles?
AStirling cycle
BJoule cycle
CCarnot cycle
DOtto cycle
Brayton cycle has:
ATwo isentropic and two constant volume processes
BTwo isentropic and two constant pressure processes
COne constant pressure, one constant volume and two adiabatic processes
DTwo isothermal, one constant volume and one constant pressure processes
When a system deviates infinitesimally from equilibrium at every instant of its state, it is undergoing what process?
AIsobaric process
BQuasi-static process
CIsometric process
DCyclic process
The state of a thermodynamic system is always defined by its:
AAbsolute temperature
BProcess
CProperties
DTemperature and pressure
What system is one in which there is no exchange of matter with the surroundings?
AOpen system
BClosed system
CIsolated system
DNonflow system
Which system is completely impervious to its surroundings and allows neither mass nor energy to cross its boundaries?
AOpen system
BClosed system
CIsolated system
DNonflow system
What refers to a system in which there is a flow of mass across its boundaries?
AOpen system
BClosed system
CIsolated system
DNonflow system
When two bodies are in thermal equilibrium with a third body, they are in equilibrium with each other. This is the:
AZeroth law of thermodynamics
BFirst law of thermodynamics
CSecond law of thermodynamics
DThird law of thermodynamics
At equal volume and the same temperature and pressure, gases contain the same number of molecules. This is:
ABoyle's law
BCharles' law
CDalton's law
DAvogadro's law
In the polytropic process \( pv^n = \text{constant} \), if \( n \to \infty \), the process is called:
AConstant volume process
BConstant pressure process
CConstant temperature process
DAdiabatic process
Which of the following cannot be a property of a gas?
ADensity
BPressure
CViscosity
DTemperature
Boiling occurs when the vapor pressure attains which pressure?
AThe gage pressure
BThe critical pressure
CThe ambient pressure
DOne standard atmosphere
Which of the following systems has no transfer of matter across the boundary and consists of a fixed amount of mass?
AClosed system
BOpen system
CIsolated system
DAll of these
Which of the following values characterize the state of a system?
ACycle
BProcess
CProperty
DEnthalpy
In a complete heat engine cycle, what does the area enclosed by the \( PV \)-diagram represent?
AThe work done by the engine per cycle
BThe heat transferred to the engine
CThe enthalpy per cycle
DThe volume of exhaust gas per cycle
Which of the following engines is the least efficient?
AGas turbine
BDiesel engine
CCarnot engine
DGasoline engine
Which of the following engines is the most efficient?
AGas turbine
BDiesel engine
CCarnot engine
DGasoline engine