থার্মোডাইনামিক্স

• ০০। A close cycle gas turbine gives __________ efficiency as compared to an open cycle gas turbine.
• ক) same
• খ) lower
• গ) higher

• ০১। A closed cycle gas turbine works on Joule‘s cycle.
• ক) True
• খ) False

• ০২। 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.
• ক) Yes
• খ) No

• ০৩। A cycle consisting of one constant pressure, one constant volume and two isentropic processes is known as
• ক) Carnot cycle
• খ) Stirling cycle
• গ) Otto cycle
• ঘ) Diesel cycle

• ০৪। A cycle consisting of two constant pressure and two isentropic processes is known as
• ক) Carnot cycle
• খ) Stirling cycle
• গ) Otto cycle
• ঘ) none of these

• ০৫। A cycle consisting of two constant pressure and two isothermal processes is known as Ericsson cycle.
• ক) True
• খ) False

• ০৬। A cycle consisting of two isothermal and two isentropic processes, is known as
• ক) Carnot cycle
• খ) Stirling cycle
• গ) Ericsson cycle
• ঘ) Joule cycle

• ০৭। A cycle consisting of __________ and two isothermal processes is known as Stirling cycle.
• ক) two constant pressure
• খ) two constant volume
• গ) two isentropic
• ঘ) one constant pressure, one constant volume

• ০৮। A definite area or a space where some thermodynamic process takes place is known as
• ক) thermodynamic system
• খ) thermodynamic cycle
• গ) thermodynamic process
• ঘ) thermodynamic law

• ০৯। A good fuel should have __________ ignition point.
• ক) high
• খ) low

• ১০। A machine which violates the first law of thermodynamics is known as perpetual motion machine of the second kind.
• ক) Correct
• খ) Incorrect

• ১১। A mixture of gas expands from 0.03 m3 to 0.06 m3 at a constant pressure of 1 MPa and absorbs 84 kJ of heat during the process. The change in internal energy of the mixture is
• ক) 30 kJ
• খ) 54 kJ
• গ) 84 kJ
• ঘ) 114 kJ

• ১২। A molecule consisting of one atom is known as
• ক) monoatomic
• খ) diatomic
• গ) triatomic
• ঘ) polyatomic

• ১৩। A path 1-2-3 is given. A system absorbs 100 kJ as heat and does 60 kJ of work while along the path 1-4-3, it does 20 kJ of work. The heat absorbed during the cycle 1-4-3 is
• ক) -140 kJ
• খ) -80 kJ
• গ) -40 kJ
• ঘ) +60 kJ

• ১৪। A perpetual motion machine of the first kind is __________ according to first law of thermodynamics.
• ক) possible
• খ) impossible

• ১৫। A process of heating crude oil to a high temperature under a very high pressure to increase the yield of lighter distillates, is known as
• ক) cracking
• খ) carbonisation
• গ) fractional distillation
• ঘ) full distillation

• ১৬। A process, in which the gas is heated or expanded in such a way that product of its pressure and volume remains constant, is called isothermal process.
• ক) Yes
• খ) No

• ১৭। A process, in which the gas is heated or expanded in such a way that the product of its pressure and volume remains constant, is called
• ক) isothermal process
• খ) hyperbolic process
• গ) adiabatic process
• ঘ) polytropic process

• ১৮। A process, in which the temperature of the working substance remains constant during its expansion or compression, is called
• ক) isothermal process
• খ) hyperbolic process
• গ) adiabatic process
• ঘ) polytropic process

• ১৯। A process, in which the working substance neither receives nor gives out heat to its surroundings during its expansion or compression, is called
• ক) isothermal process
• খ) hyperbolic process
• গ) adiabatic process
• ঘ) polytropic process