# A perpetual motion machine is

1.  A thermodynamic machine

2.  A non-thermodynamic machine

3.  A hypothetical machine

4.  A hypothetical machine whose operation would violate the laws of thermodynamics

4

A hypothetical machine whose operation would violate the laws of thermodynamics

Explanation :
No Explanation available for this question

# Kelvin Planck's law deals with

1.  Conservation of heat

2.  Conservation of work

3.  Conversion of heat into work

4.  Conversion of work into heat

4

Conversion of heat into work

Explanation :
No Explanation available for this question

# According to Clausis statement of second law of thermodynamics Heat can't be transferred from low temperature source to high temperature source Heat can be transferred for low temperature to high temperature source by using refrigeration cycle. Heat can be transferred from low temperature to high temperature source if COP of process is more than unity Heat can't be transferred from low temperature to high temperature source without the aid of external energy

1.  Heat can't be transferred from low temperature source to high temperature source

2.  Heat can be transferred for low temperature to high temperature source by using refrigeration cycle.

3.  Heat can be transferred from low temperature to high temperature source if COP of process is more than unity

4.  Heat can't be transferred from low temperature to high temperature source without the aid of external energy

4

Heat can't be transferred from low temperature to high temperature source without the aid of external energy

Explanation :
No Explanation available for this question

# Thermal power plant works on

1.  Carnot cycle

2.  Joule cycle

3.  Rankin cycle

4.  Otto cycle

4

Rankin cycle

Explanation :
No Explanation available for this question

# Which of the following is an irreversible cycle

1.  Carnot

2.  Stirling

3.  Ericson

4.  None of the above.

4

None of the above.

Explanation :
No Explanation available for this question

# Otto cycle consists of following four processes:

1.  Two isothermals and two is entropics

2.  Two is entropics and two constant volumes

3.  Two is entropics, one constant volume and one constant pressure

4.  Two is entropics and two constant pressures

4

Two is entropics and two constant volumes

Explanation :
No Explanation available for this question

# The efficiency of a Carnot engine depends on

1.  Working substance

2.  Design of engine

3.  Size of engine

4.  Temperatures of source and sink.

4

Temperatures of source and sink.

Explanation :
No Explanation available for this question

# For same compression ratio and for same heat added:

1.  Otto cycle is more efficient than Diesel cycle

2.  Diesel cycle is more efficient than Otto cycle

3.  Efficiency depends on other factors

4.  Both Otto and Diesel cycles are equally efficient

4

Otto cycle is more efficient than Diesel cycle

Explanation :
No Explanation available for this question

# The efficiency of Carnot cycle is maximum for:-

1.  Gas engine

2.  Well lubricated engine

3.  Petrol engine

4.  Reversible engine.

4

Reversible engine.

Explanation :
No Explanation available for this question

# Carnot cycle is:

1.  A reversible cycle

2.  An irreversible cycle

3.  A semi-reversible cycle