# For a thermodynamic process to be reversible, the temperature difference between hot body and working substance should be:

1.  Zero

2.  Minimum

3.  Maximum

4.  Infinity

4

Zero

Explanation :
No Explanation available for this question

# Minimum work in compressor is possible when the value of adiabatic index n is equal to

1.  0.75

2.  1

3.  1.27

4.  1.35

4

1

Explanation :
No Explanation available for this question

# Molecular volume of any perfect gas at 600 x 103 N/m2 and 27°C will be:

1.  4.17m3/kg-mol

2.  400m3/kg-mol

3.  0.15m3/kg-mol

4.  41.7m3/kg-mol

4

4.17m3/kg-mol

Explanation :
No Explanation available for this question

# A gas is compressed in a cylinder by a movable piston to a volume one-half its original volume. During the process 300 kJ heat left the gas and internal energy remained same. The work done on gas in Nm will be:

1.  300 Nm

2.  300,000 Nm

3.  30 Nm

4.  3000 Nm

4

300,000 Nm

Explanation :
No Explanation available for this question

# The more effective way of increasing efficiency of Carnot engine is to

1.  Increase higher temperature

2.  Decrease higher temperature

3.  Increase lower temperature

4.  Decrease lower temperature

4

Decrease lower temperature

Explanation :
No Explanation available for this question

# Entropy change depends on

1.  Heat transfer

2.  Mass transfer

3.  Change of temperature

4.  Thermodynamic state

4

Heat transfer

Explanation :
No Explanation available for this question

# For reversible adiabatic process, change in entropy is:

1.  Maximum

2.  Minimum

3.  Zero

4.  Unpredictable

4

Zero

Explanation :
No Explanation available for this question

# Isochoric process is one in which:

1.  Free expansion takes place

2.  Very little mechanical work is done by the system

3.  No mechanical work is done by the system

4.   All parameters remain constant

4

No mechanical work is done by the system

Explanation :
No Explanation available for this question

# According to first law of thermodynamics

1.  Work done by a system is equal to heat transferred by the system

2.  Total internal energy of a system during a process remains constant

3.  Internal energy, enthalpy and entropy during a process remain constant

4.  Total energy of a system remains constant

4

Total energy of a system remains constant

Explanation :
No Explanation available for this question

# Energy can neither be created nor destroyed but can be converted from one form to other is inferred from

1.  Zeroth low of thermodynamic

2.  First law of thermodynamics

3.  Second law to thermodynamics

4.  Basic law of thermodynamics

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