Important question for Mechanical Engineer during interview:
The subject of mechanical engineering ,the all of question are important and asking during interviewer as follows:
1.Why entropy change for a reversible adiabatic process is zero ?
Ans. This is because of there is no heat transfer in this process.
2.What are two essential conditions for perfect gas ?
Ans. There is two conditions for perfect gas:
1.It's specific heats are constant.
2.It satisfies equation of state.
3. Enthalpy and entropy are functions of one single parameter,Which is that?
Ans. Enthalpy and entropy are functions of :Temperature only.
4.What are the condition when maximum discharge is obtained in nozzle?
Ans. At the critical pressure ratio,the maximum discharge is obtained in nozzle.
5.What are the names given to
a .constant temperature,
b.Constant Pressure,
c.Constant Volume,
d.Constant Internalenergy,
e.Constant Enthalpy,
f.Constant Entropy Processes.
Ans: Isothermal, isochroic, isobaric, free expression, throttling and adiabatic processes .
6.
6.types of basic system for phase transformation.
Ans.Basic) System: • This refers to any portion of objective space within specified boundaries subject to specified variables. An alloy system is a combination of two or more elements forming alloys which are considered within a specified range of temperature, pressure and concentration. Engies
(ii) Phase: Any homogenous, physically distinct and mechanically separable portion of a system is known as a phase. For example if two liquids are immiscible (i.e., benzene and water) they will form two separate phases. And if two liquids are miscible (i.e., alcohol and water), they will form one liquid phase only. Two solid solutions of different compositions may exist together and forms two phases.
7.Types of phase Rule in phase transformation.
Phase Rule: The number of degrees of freedom (F) of the system is related to the number of components (C) and of phases (P) by the phase rule equation: F=C-P+2 Where, P is the number of phases, F is the number of degrees of freedom and C is the number of components. Phase transformation: Conversion of a material from one phase to another phase either by heating or cooling process.
8.what is mean by phase ?
Phase is diagram which phase transformation of a material.
9.what are main elements shows in phase transformation diagram?
And: Phase Diagrams : Phase diagrams are the charts which show the relationship between the composition, temperature and structure of any alloy series. A temperature - composition diagram which indicates the structural changes that take place during heating and cooling of an alloy series is known as phase diagram and is also known as equilibrium diagram or constitutional diagram
10.what re the type of phase diagram?
And.ypes of Phase Diagram (i) Temperature Vs Composition Phase Diagram (Equilibrium condition of phase diagram) (ii) Temperature Vs Time Phase Diagram (Non Equilibrium condition of phase diagram)
1.It's specific heats are constant.
2.It satisfies equation of state.
3. Enthalpy and entropy are functions of one single parameter,Which is that?
Ans. Enthalpy and entropy are functions of :Temperature only.
4.What are the condition when maximum discharge is obtained in nozzle?
Ans. At the critical pressure ratio,the maximum discharge is obtained in nozzle.
5.What are the names given to
a .constant temperature,
b.Constant Pressure,
c.Constant Volume,
d.Constant Internalenergy,
e.Constant Enthalpy,
f.Constant Entropy Processes.
Ans: Isothermal, isochroic, isobaric, free expression, throttling and adiabatic processes .
6.
6.types of basic system for phase transformation.
Ans.Basic) System: • This refers to any portion of objective space within specified boundaries subject to specified variables. An alloy system is a combination of two or more elements forming alloys which are considered within a specified range of temperature, pressure and concentration. Engies
(ii) Phase: Any homogenous, physically distinct and mechanically separable portion of a system is known as a phase. For example if two liquids are immiscible (i.e., benzene and water) they will form two separate phases. And if two liquids are miscible (i.e., alcohol and water), they will form one liquid phase only. Two solid solutions of different compositions may exist together and forms two phases.
7.Types of phase Rule in phase transformation.
Phase Rule: The number of degrees of freedom (F) of the system is related to the number of components (C) and of phases (P) by the phase rule equation: F=C-P+2 Where, P is the number of phases, F is the number of degrees of freedom and C is the number of components. Phase transformation: Conversion of a material from one phase to another phase either by heating or cooling process.
8.what is mean by phase ?
Phase is diagram which phase transformation of a material.
9.what are main elements shows in phase transformation diagram?
And: Phase Diagrams : Phase diagrams are the charts which show the relationship between the composition, temperature and structure of any alloy series. A temperature - composition diagram which indicates the structural changes that take place during heating and cooling of an alloy series is known as phase diagram and is also known as equilibrium diagram or constitutional diagram
10.what re the type of phase diagram?
And.ypes of Phase Diagram (i) Temperature Vs Composition Phase Diagram (Equilibrium condition of phase diagram) (ii) Temperature Vs Time Phase Diagram (Non Equilibrium condition of phase diagram)
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