The index of compression ‘n’ tends to reach ratio of specific heats ‘y’ when

Engineering Thermodynamics
The index of compression ‘n’ tends to reach ratio of specific heats ‘y’ when

Process is isentropic

Process is isothermal

Process is isentropic and specific heat does not change with temperature

Flow is uniform and steady

Process is isentropic

Process is isothermal

Process is isentropic and specific heat does not change with temperature

Flow is uniform and steady

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Engineering Thermodynamics
Work-done during adiabatic expansion is given by (where p1 v1, T1 = Pressure, volume and temperature for the initial condition of gas, p2, v2, T2 = Corresponding values for the final condition of gas, R = Gas constant, and γ = Ratio of specific heats)

(p1 v1 - p2, v2)/(γ - 1)

All of these

[m R (T1 - T2)] /(γ - 1)

[m R T1/(γ - 1)][1 - (p2, v2 /p1 v1)]

(p1 v1 - p2, v2)/(γ - 1)

All of these

[m R (T1 - T2)] /(γ - 1)

[m R T1/(γ - 1)][1 - (p2, v2 /p1 v1)]

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Engineering Thermodynamics
If a fluid expands suddenly into vacuum through an orifice of large dimension, then such a process is called

Free expansion

Adiabatic expansion

Parabolic expansion

Hyperbolic expansion

Free expansion

Adiabatic expansion

Parabolic expansion

Hyperbolic expansion

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Engineering Thermodynamics
Relation between cp and cv is given by (where cp = Specific heat at constant pressure, cv = Specific heat at constant volume, γ = cp/cv, known as adiabatic index, and R = Gas constant)

Both (B) and (C)

cp - cv = R

cv = R/ γ-1

cv/ cp =R

Both (B) and (C)

cp - cv = R

cv = R/ γ-1

cv/ cp =R

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Engineering Thermodynamics
According to Kelvin-Planck’s statement of second law of thermodynamics,

It is impossible to construct a device which operates in a cyclic process and produces no effect other than the transfer of heat from a cold body to a hot body

None of these

It is possible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work

It is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work

It is impossible to construct a device which operates in a cyclic process and produces no effect other than the transfer of heat from a cold body to a hot body

None of these

It is possible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work

It is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work

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Engineering Thermodynamics
One reversible heat engine operates between 1600 K and T2 K and another reversible heat engine operates between T2 K and 400 K. If both the engines have the same heat input and output, then temperature T2 is equal to

1000 K

1200 K

800 K

1400 K

1000 K

1200 K

800 K

1400 K

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Engineering Thermodynamics

Engineering Thermodynamics The index of compression ‘n’ tends to reach ratio of specific heats ‘y’ when

Engineering Thermodynamics Work-done during adiabatic expansion is given by (where p1 v1, T1 = Pressure, volume and temperature for the initial condition of gas, p2, v2, T2 = Corresponding values for the final condition of gas, R = Gas constant, and γ = Ratio of specific heats)

Engineering Thermodynamics If a fluid expands suddenly into vacuum through an orifice of large dimension, then such a process is called

Engineering Thermodynamics Relation between cp and cv is given by (where cp = Specific heat at constant pressure, cv = Specific heat at constant volume, γ = cp/cv, known as adiabatic index, and R = Gas constant)

Engineering Thermodynamics According to Kelvin-Planck’s statement of second law of thermodynamics,

Engineering Thermodynamics One reversible heat engine operates between 1600 K and T2 K and another reversible heat engine operates between T2 K and 400 K. If both the engines have the same heat input and output, then temperature T2 is equal to

Engineering Thermodynamics
The index of compression ‘n’ tends to reach ratio of specific heats ‘y’ when

Engineering Thermodynamics
Work-done during adiabatic expansion is given by (where p1 v1, T1 = Pressure, volume and temperature for the initial condition of gas, p2, v2, T2 = Corresponding values for the final condition of gas, R = Gas constant, and γ = Ratio of specific heats)

Engineering Thermodynamics
If a fluid expands suddenly into vacuum through an orifice of large dimension, then such a process is called

Engineering Thermodynamics
Relation between cp and cv is given by (where cp = Specific heat at constant pressure, cv = Specific heat at constant volume, γ = cp/cv, known as adiabatic index, and R = Gas constant)

Engineering Thermodynamics
According to Kelvin-Planck’s statement of second law of thermodynamics,

Engineering Thermodynamics
One reversible heat engine operates between 1600 K and T2 K and another reversible heat engine operates between T2 K and 400 K. If both the engines have the same heat input and output, then temperature T2 is equal to