Description : Which of the following is least efficient? a. Gas turbine b. Diesel engine c. Carnot engine d. Gasoline engine
Last Answer : Gasoline engine
Description : Which of the following engines was introduced by a German engineer, Nickolas Otto? a. Gasoline engine b. Diesel engine c. Gas turbine d. Thermal engine
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
Description : Gasoline and Diesel Engines are best described by the _________. a. Otto Cycle b. Burnign Cycle c. Shikki Cycle d. Shapa R’ Elli Cycle
Last Answer : Otto Cycle
Description : Carnot cycle has maximum efficiency for (a) reversible engine (b) irreversible engine (c) new engine (d) petrol engine (e) diesel engine.
Last Answer : Answer : a
Description : 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
Last Answer : Carnot heat engine
Description : 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.
Last Answer : Answer : c
Description : 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
Last Answer : External combustion engine
Description : Which is the incorrect statement about Carnot cycle? A. It is used as the alternate standard of comparison of all heat engines. B. All the heat engines are based on Carnot cycle. C. It provides concept of maximising work output between the two temperature limits. D. all of the above
Last Answer : Answer: B
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
Description : 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
Last Answer : Answer: D
Description : The most efficient cycle that can operate between two constant temperature reservoir is the _________. a. Otto Cycle b. Lazare Cycle c. Isothermal Cycle d. Carnot Cycle
Last Answer : Carnot Cycle
Description : The compression ratio for Diesel engines is A. 3 to 6 B. 5 to 8 C. 15 to 20 D. 20 to 30
Last Answer : Answer: C
Description : 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
Last Answer : Carnot efficiency
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.
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
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.
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.
Description : Which of the following engines is the most efficient? a. Isobaric expansion b. Adiabatic compression c. Adiabatic expansion d. Isothermal expansion
Last Answer : Isobaric expansion
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.
Description : 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
Last Answer : Brayton Cycle
Description : In thermodynamics, a throttling process, also called a _________, is a type of isenthalpic process where a liquid or gas is cooled as it passes from a higher pressure state to a lower pressure state. a. Rankine Process b. Carnot Cycle c. Joule-Thomson process d. Refrigeration process
Last Answer : Joule-Thomson process
Description : The efficiency and work ratio of a simple gas turbine cycle are A.low B.very low C.high D.very high
Description : Gas turbine cycle consists of (a) two isothermals and two isentropics (b) two isentropics and two constant volumes (c) two isentropics, one constant volume and one constant pressure (d) two isentropics and two constant pressures (e) none of the above.
Description : Which Has More Efficiency: Diesel Engine Or Petrol Engines?
Last Answer : Off course Diesel engine has the better efficiency out of two.
Description : A Bell-Coleman cycle is a reversed of which the following cycles? a. Stirling cycle b. Joule cycle c. Carnot cycle d. Otto cycle
Last Answer : Joule cycle
Description : Which of the following is used in thermal power plant? a. Brayton cycle b. Reversed carnot cycle c. Rankine cycle d. Otto cycle
Last Answer : Rankine cycle
Description : Who is the father of thermodynamics? a. Lazare Carnot b. Sadi Carnot c. William Thompson d. Rudolf Classius
Last Answer : Sadi Carnot
Description : The Carnot cycle is composed of ______ processes. A. One isothermal and one adiabatic B. One isothermal and two adiabatic C. Two isothermal and one adiabatic D. Two isothermal and two adiabatic
Last Answer : Two isothermal and two adiabatic
Description : The Carnot cycle is composed of how many reversible processes? A. 2 B. 3 C. 4 D. 5
Last Answer : 4
Description : Who proposed the Carnot cycle? A. Sammy Carnot B. Sonny Carnot C. Sadi Carnot D. Suri Carnot
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
Description : During which of the following process does heat rejection takes place in Carnot cycle? A. Isothermal expansion B. Isentropic expansion C. Isothermal compression D. Isentropic compression
Description : 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
Description : The efficiency of Stirling cycle is __________ Carnot cycle. A. greater than B. less than C. equal to
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
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.
Description : Which of the following cycles has maximum efficiency (a) Rankine (b) Stirling (c) Carnot (d) Brayton (e) Joule.
Description : Which of the following cycles is not a reversible cycle (a) Carnot (b) Ericsson (c) Stirling (d) Joule (e) none of the above.
Description : Reversed joule cycle is called (a) Carnot cycle (b) Rankine cycle (c) Brayton cycle (d) Bell Coleman cycle (e) Dual cycle.
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.
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.
Description : Thermal power plant works on (a) Carnot cycle (b) Joule cycle (d) Rankine cycle (d) Otto cycle (e) Brayton cycle.
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.
Description : 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.
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.
Description : What Happens If Gasoline Is Used In A Diesel Engine, Siesel Engine Will Work?
Last Answer : No, It will not work, as the Compression ratio of Petrol engine is 6 to 10 & that of Diesel engine is 15 to 22. Thus on such high compression, gasoline gets highly compressed & it may blast.
Description : Open system usually encloses which of the following devices? A. Compressor B. Turbine C. Nozzle D. All of the above
Last Answer : All of the above
Description : The compression ratio for petrol engines is A.3 to 6 B.5 to 8 C.15 to 20 D.20 to 30
Description : Zeroth law of thermodynamics (a) deals with conversion of mass and energy (b) deals with reversibility and irreversibility of process (c) states that if two systems are both in equilibrium with a ... in thermal equilibrium with each other (d) deals with heat engines (e) does not exist.