Carnot cycle has maximum efficiency for  (a) reversible engine  (b) irreversible engine  (c) new engine  (d) petrol engine  (e) diesel engine.

Carnot cycle has maximum efficiency for  (a) reversible engine  (b) irreversible engine  (c) new engine  (d) petrol engine  (e) diesel engine.
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The efficiency of Carnot cycle is maximum for  (a) gas engine  (b) well lubricated engine  (c) petrol engine  (d) steam engine  (e) reversible engine.

Description : The efficiency of Carnot cycle is maximum for  (a) gas engine  (b) well lubricated engine  (c) petrol engine  (d) steam engine  (e) reversible engine.

Last Answer : Answer : e

Carnot cycle is  (a) a reversible cycle (ft) an irreversible cycle  (c) a semi-reversible cycle  (d) a quasi static cycle  (e) an adiabatic irreversible cycle.

Description : Carnot cycle is  (a) a reversible cycle (ft) an irreversible cycle  (c) a semi-reversible cycle  (d) a quasi static cycle  (e) an adiabatic irreversible cycle.

Last Answer : Answer : a

What is a heat engine that operates on the reversible Carnot cycle called?  A. Carnot heat engine  B. Ideal heat engine  C. Most efficient heat engine  D. Best heat engine

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Last Answer : Carnot heat engine

An actual engine is to be designed having same efficiency as the Carnot cycle. Such a proposition is  (a) feasible  (b) impossible  (c) possible  (d) possible, but with lot of sophistications  (e) desirable.

Description : An actual engine is to be designed having same efficiency as the Carnot cycle. Such a proposition is  (a) feasible  (b) impossible  (c) possible  (d) possible, but with lot of sophistications  (e) desirable.

Last Answer : Answer : d

Carnot cycle efficiency depends upon  (a) properties of the medium/substance used  (b) condition of engine  (c) working condition  (d) temperature range of operation  (e) effectiveness of insulating material around the engine.

Description : Carnot cycle efficiency depends upon  (a) properties of the medium/substance used  (b) condition of engine  (c) working condition  (d) temperature range of operation  (e) effectiveness of insulating material around the engine.

Last Answer : Answer : d

Which of the following is an irreversible cycle  (a) carnot  (b) Stirling  (c) ericsson  (d) all of the above  (e) none of the above.

Description : Which of the following is an irreversible cycle  (a) carnot  (b) Stirling  (c) ericsson  (d) all of the above  (e) none of the above.

Last Answer : Answer : e

Carnot cycle efficiency is maximum when  (a) initial temperature is 0°K  (b) final temperature is 0°K  (c) difference between initial and final temperature is 0°K  (d) final temperature is 0°C  (e) initial temperature is minimum possible.

Description : Carnot cycle efficiency is maximum when  (a) initial temperature is 0°K  (b) final temperature is 0°K  (c) difference between initial and final temperature is 0°K  (d) final temperature is 0°C  (e) initial temperature is minimum possible.

Last Answer : Answer : b

Which of the following cycles is not a reversible cycle  (a) Carnot  (b) Ericsson  (c) Stirling  (d) Joule  (e) none of the above.

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Last Answer : Answer : e

What states that thermal efficiencies of all reversible heat engines operating between the same two reservoirs are the same and that no heat engine is more efficient than a reversible one operating between the same two reservoirs?  A. Ericson principle  B. Carnot principle  C. Otto principle  D. Stirling principle

Description : What states that thermal efficiencies of all reversible heat engines operating between the same two reservoirs are the same and that no heat engine is more efficient than a reversible one operating between the ... A. Ericson principle  B. Carnot principle  C. Otto principle  D. Stirling principle

Last Answer : Carnot principle

The Carnot cycle is composed of how many reversible processes?  A. 2  B. 3  C. 4  D. 5

Description : The Carnot cycle is composed of how many reversible processes?  A. 2  B. 3  C. 4  D. 5

Last Answer : 4

Carnot cycle is the best known reversible cycle which was first proposed in what year?  A. 1842  B. 1824  C. 1832  D. 1834

Description : Carnot cycle is the best known reversible cycle which was first proposed in what year?  A. 1842  B. 1824  C. 1832  D. 1834

Last Answer : 1824

A series of operations, which takes place in a certain order and restore the initial conditions at the end, is known as  A. reversible cycle  B. irreversible cycle  C. thermodynamic cycle  D. none of these

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Last Answer : Answer: C

Which of the following engines is the most efficient?  a. Gas turbine  b. Diesel engine  c. Carnot engine  d. Gasoline engine

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Last Answer : Carnot engine

Which of the following is least efficient?  a. Gas turbine  b. Diesel engine  c. Carnot engine  d. Gasoline engine

Description : Which of the following is least efficient?  a. Gas turbine  b. Diesel engine  c. Carnot engine  d. Gasoline engine

Last Answer : Gasoline engine

A cycle consisting of one constant pressure, one constant volume and two isentropic processes is known as  A.Carnot cycle  B.Stirling cycle  C.Otto cycle  D.Diesel cycle

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Last Answer : Answer: D

The efficiency of a Carnot engine depends on  (a) working substance  (b) design of engine  (c) size of engine  (d) type of fuel fired  (e) temperatures of source and sink.

Description : The efficiency of a Carnot engine depends on  (a) working substance  (b) design of engine  (c) size of engine  (d) type of fuel fired  (e) temperatures of source and sink.

Last Answer : Answer : e

The more effective way of increasing efficiency of Carnot engine is to  (a) increase higher temperature  (b) decrease higher temperature  (c) increase lower temperature  (d) decrease lower temperature  (e) keep lower temperature constant.

Description : The more effective way of increasing efficiency of Carnot engine is to  (a) increase higher temperature  (b) decrease higher temperature  (c) increase lower temperature  (d) decrease lower temperature  (e) keep lower temperature constant.

Last Answer : Answer : d

If both Stirling and Carnot cycles operate within the same temperature limits, then efficiency of Stirling cycle as compared to Carnot cycle  (a) more  (b) less  (c) equal  (d) depends on other factors  (e) none of the above.

Description : If both Stirling and Carnot cycles operate within the same temperature limits, then efficiency of Stirling cycle as compared to Carnot cycle  (a) more  (b) less  (c) equal  (d) depends on other factors  (e) none of the above.

Last Answer : Answer : c

What is the highest efficiency of heat engine operating between the two thermal energy reservoirs at temperature limits?  A. Ericson efficiency  B. Otto efficiency  C. Carnot efficiency  D. Stirling efficiency

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Last Answer : Carnot efficiency

The efficiency of Joule cycle is  A. greater than Carnot cycle  B. less than Carnot cycle  C. equal to Carnot cycle  D. none of these

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Last Answer : Answer: B

The efficiency of Stirling cycle is __________ Carnot cycle.  A. greater than  B. less than  C. equal to

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Otto cycle efficiency is higher than Diesel cycle efficiency for the same compression ratio and heat input because in Otto cycle  A. combustion is at constant volume  B. expansion and compression are isentropic  C. maximum temperature is higher  D. heat rejection is lower

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Last Answer : Answer: D

Which of the following cycles has maximum efficiency  (a) Rankine  (b) Stirling  (c) Carnot  (d) Brayton  (e) Joule.

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Last Answer : Answer : c

Which of the following represents the perpetual motion of the first kind  (a) engine with 100% thermal efficiency  (b) a fully reversible engine  (c) transfer of heat energy from low temperature source to high temperature source  (d) a machine that continuously creates its own energy  (e) production of energy by temperature differential in sea water at different levels.

Description : Which of the following represents the perpetual motion of the first kind  (a) engine with 100% thermal efficiency  (b) a fully reversible engine  (c) transfer of heat energy from low ... its own energy  (e) production of energy by temperature differential in sea water at different levels.

Last Answer : Answer : d

Stirling and Ericsson cycles are  (a) reversible cycles  (b) irreversible cycles  (c) quasi-static cycles  (d) semi-reversible cycles  (e) adiabatic irreversible cycles.

Description : Stirling and Ericsson cycles are  (a) reversible cycles  (b) irreversible cycles  (c) quasi-static cycles  (d) semi-reversible cycles  (e) adiabatic irreversible cycles.

Last Answer : Answer : a

The value of n = 1 in the polytropic process indicates it to be  (a) reversible process  (b) isothermal process  (c) adiabatic process  (d) irreversible process  (e) free expansion process.

Description : The value of n = 1 in the polytropic process indicates it to be  (a) reversible process  (b) isothermal process  (c) adiabatic process  (d) irreversible process  (e) free expansion process.

Last Answer : Answer : b

Pick out the correct statement. (A) The available energy in an isolated system for all irreversible (real) processes decreases (B) The efficiency of a Carnot engine increases, if the sink temperature is decreased (C) The reversible work for compression in non-flow process under isothermal condition is the change in Helmholtz free energy (D) All (A), (B) and (C)

Description : Pick out the correct statement. (A) The available energy in an isolated system for all irreversible (real) processes decreases (B) The efficiency of a Carnot engine increases, if the sink temperature is decreased ... condition is the change in Helmholtz free energy (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

The thermodynamic difference between a Rankine cycle working with saturated steam and the Carnot cycle is that  (a) carnot cycle can’t work with saturated steam  (b) heat is supplied to water at temperature below the maximum temperature of the cycle  (c) a rankine cycle receives heat at two places  (d) rankine cycle is hypothetical  (e) none of the above.

Description : The thermodynamic difference between a Rankine cycle working with saturated steam and the Carnot cycle is that  (a) carnot cycle can't work with saturated steam  (b) heat is supplied to water at temperature ... heat at two places  (d) rankine cycle is hypothetical  (e) none of the above.

Last Answer : Answer : b

What refers to the thermodynamic properties which are independent on the amount of the substance present?  a. Extensive property  b. Intensive properties  c. Reversible properties  d. Irreversible properties

Description : What refers to the thermodynamic properties which are independent on the amount of the substance present?  a. Extensive property  b. Intensive properties  c. Reversible properties  d. Irreversible properties

Last Answer : Intensive properties

What refers to the thermodynamic properties which are dependent on the amount of the substance present?  a. Extensive property  b. Intensive properties  c. Reversible properties  d. Irreversible properties

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Last Answer : Extensive property

Ideal process are ________ process  a. Irreversible  b. Reversible  c. Isothermal  d. Isometric

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Last Answer : Reversible

The term “isentropic process” used in thermodynamics implies what?  A. Reversible adiabatic process  B. Externally reversible, adiabatic process  C. Internally reversible, adiabatic process  D. Irreversible adiabatic process

Description : The term “isentropic process” used in thermodynamics implies what?  A. Reversible adiabatic process  B. Externally reversible, adiabatic process  C. Internally reversible, adiabatic process  D. Irreversible adiabatic process

Last Answer : Internally reversible, adiabatic process

How does an adiabatic process compare to an isentropic process?  A. Adiabatic heat transfer is not equal to zero; isentropic heat transfer is zero  B. Both heat transfer = 0; isentropic: reversible  C. Adiabatic heat transfer = 0; isentropic: heat transfer is not equal to zero  D. Both heat transfer is not equal to zero; isentropic: irreversible

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Last Answer : Both heat transfer = 0; isentropic: reversible

The free expansion process is __________ non-flow process.  A. reversible  B. irreversible

Description : The free expansion process is __________ non-flow process.  A. reversible  B. irreversible

Last Answer : Answer: B

Stirling and Ericsson cycles are  A. reversible cycles  B. irreversible cycles  C. semi-reversible cycles  D. quasi-static cycles

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Last Answer : Answer: A

For same compression ratio and for same heat added  (a) Otto cycle is more efficient than Diesel cycle  (b) Diesel cycle is more efficient than Otto cycle  (c) efficiency depends on other factors  (d) both Otto and Diesel cycles are equally efficient  (e) none of the above.

Description : For same compression ratio and for same heat added  (a) Otto cycle is more efficient than Diesel cycle  (b) Diesel cycle is more efficient than Otto cycle  (c) efficiency depends on other factors  (d) both Otto and Diesel cycles are equally efficient  (e) none of the above.

Last Answer : Answer : a

The efficiency of Diesel cycle depends upon  A. temperature limits  B. pressure ratio  C. compression ratio  D. cut-off ratio and compression ratio

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Last Answer : Answer: D

When cut-off ratio is __________ the efficiency of Diesel cycle approaches to Otto cycle efficiency.  A. zero  B. 1/5  C. 4/5  D. 1

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Last Answer : Answer: A

The efficiency of Diesel cycle increases with  A. decrease in cut-off  B. increase in cut-off  C. constant cut-off  D. none of these

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Last Answer : Answer: A

The efficiency of Diesel cycle approaches to Otto cycle efficiency when  A. cut-off is increased  B. cut-off is decreased  C. cut-off is zero  D. cut-off is constant

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Last Answer : Answer: C

Which of the following best describes both Stirling and Ericson engines?  a. Internal combustion engine  b. External combustion engine  c. Diesel cycle  d. Rankine cycle

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Last Answer : External combustion engine

According to first law of thermodynamics  (a) mass and energy are mutually convertible  (b) Carnot engine is most efficient  (c) heat and work are mutually convertible  (d) mass and light are mutually convertible  (e) heat flows from hot substance to cold substance.

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Last Answer : Answer : c

The following cycle is used for air craft refrigeration  (a) Brayton cycle  (b) Joule cycle  (c) Carnot cycle  (d) Bell-Coleman cycle  (e) Reversed-Brayton cycle.

Description : The following cycle is used for air craft refrigeration  (a) Brayton cycle  (b) Joule cycle  (c) Carnot cycle  (d) Bell-Coleman cycle  (e) Reversed-Brayton cycle.

Last Answer : Answer : e

Reversed joule cycle is called  (a) Carnot cycle  (b) Rankine cycle  (c) Brayton cycle  (d) Bell Coleman cycle  (e) Dual cycle.

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Last Answer : Answer : c

Thermal power plant works on  (a) Carnot cycle  (b) Joule cycle  (d) Rankine cycle  (d) Otto cycle  (e) Brayton cycle.

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Last Answer : Answer : c

In a Carnot cycle, heat is transferred at  (a) constant pressure  (b) constant volume  (c) constant temperature  (d) constant enthaply  (e) any one of the above.

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Last Answer : Answer : c

Which Has More Efficiency: Diesel Engine Or Petrol Engines?

Description : Which Has More Efficiency: Diesel Engine Or Petrol Engines?

Last Answer : Off course Diesel engine has the better efficiency out of two.

It is used for gas turbines which operates on an open cycle where both the compression and expansion processes take place in rotating machinery.  a. Dual Cycle  b. Otto Cycle  c. Carnot Cycle  d. Brayton Cycle

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Last Answer : Brayton Cycle

A Bell-Coleman cycle is a reversed of which the following cycles?  a. Stirling cycle  b. Joule cycle  c. Carnot cycle  d. Otto cycle

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Which of the following is used in thermal power plant?  a. Brayton cycle  b. Reversed carnot cycle  c. Rankine cycle  d. Otto cycle

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Last Answer : Rankine cycle