# A perpetual motion machine of the first kind i.e. a machine which produces power without consuming any energy is

1.  Possible according to first law of thermodynamics

2.  Impossible according to first law of thermodynamics

3.  Impossible according to second law of thermodynamics

4.  Possible according to second law of thermodynamics

4
Correct Answer :

Impossible according to first law of thermodynamics

Explanation :
No Explanation available for this question

# According to kinetic theory of gases, at absolute zero

1.  Specific heat of molecules reduces to zero

2.  Kinetic energy of molecules reduces to zero

3.  Volume of gas reduce to zero

4.  Pressure of gas reduce to zero

4
Correct Answer :

Kinetic energy of molecules reduces to zero

Explanation :
No Explanation available for this question

# In an isothermal process, internal energy

1.  Increases

2.  Remains constant

3.  Decreases

4.  None of the above

4
Correct Answer :

Remains constant

Explanation :
No Explanation available for this question

# For the same expansion ratio, work done by the gas in case of adiabatic process as compared to work done in case of isothermal process is

1.  Same

2.  More

3.  Less

4.  None of the above

4
Correct Answer :

Less

Explanation :
No Explanation available for this question

# In isothermal expansion. Work done by gas depends upon

1.  Atomicity of gas only

2.  Expansion ratio only

3.  Adiabatic index

4.  Both (a) and (b)

4
Correct Answer :

Both (a) and (b)

Explanation :
No Explanation available for this question

# A process, in which no heat is supplied or rejected from the system and entropy is not constant, is called

1.  Isothermal

2.  Isentropic

3.  Polytrophic

4.  Hyperbolic

4
Correct Answer :

Polytrophic

Explanation :
No Explanation available for this question

# A process, in which the working substance neither receives nor gives out heat to its surroundings during its expansion or contraction, is called

1.  Isothermal process

2.  Isentropic process

3.  Polytrophic process

4.   Adiabatic process

4
Correct Answer :

Adiabatic process

Explanation :
No Explanation available for this question

# If v1 is volume at the beginning and v2 is volume at the end of expansion, then expansion ratio (r) is given by

1.  V1/v2

2.  V2/v1

3.  V1+v2/v1

4.  V1+v2/v2-v1

4
Correct Answer :

V2/v1

Explanation :
No Explanation available for this question

# The net work done in a polytrophic process is given by

1.  p1V1-p2V2/(n-1)

2.  p2V2-p1V1/(n-1)

3.  p1V1-p2V2/n

4.  p2V2-p1V1/n

4
Correct Answer :

p1V1-p2V2/(n-1)

Explanation :
No Explanation available for this question

# The polytrophic index (n) is given by

1.  log (p2/p1)/log(v1/v2)

2.  log(v1/v2)/log (p1/p2)

3.  log(p1/p2)/log(v1/v2)

4.  None of the above

4
Correct Answer :

log (p2/p1)/log(v1/v2)

Explanation :
No Explanation available for this question

## Interview Questions

 MongoDB Java Script Node JS PHP JQuery Python