Ideal refrigeration cycle is (A) Same as Carnot cycle (B) Same as reverse Carnot cycle (C) Dependent on the refrigerant's properties (D) The least efficient of all refrigeration processes

Ideal refrigeration cycle is
(A) Same as Carnot cycle
(B) Same as reverse Carnot cycle
(C) Dependent on the refrigerant's properties
(D) The least efficient of all refrigeration processes
by

1 Answer

Answer :

(B) Same as reverse Carnot cycle
by

Related questions

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In vapour compression refrigeration system, if the evaporator temperature and the condenser temperatures are -13°C and 37°C respectively, the Carnot COP will be (A) 5.2 (B) 6.2 (C) 0.168 (D) Data insufficient, can't be found out

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The co-efficient of performance (COP) of a refrigerating system, which is its index of performance, is defined as the ratio of useful refrigeration to the net work. The units of __________ and COP are the same. (A) Kinematic viscosity (B) Work (C) Temperature (D) None of these

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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

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The efficiency of a Carnot heat engine operating between absolute temperatures T1 and T2 (when, T1 > T2) is given by (T1- T2)/T1. The co efficient of performance (C.O.P.) of a Carnot heat pump operating between T1 and T2is given by (A) T1/(T1-T2) (B) T2/(T1-T2) (C) T1/T2 (D) T2/R1

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Pick out the wrong statement. (A) Trouton's ratio of non-polar liquids is calculated using Kistyakowsky equation (B) Thermal efficiency of a Carnot engine is always less than 1 (C) An equation relating pressure, volume and temperature of a gas is called ideal gas equation (D) None of these

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Last Answer : (C) An equation relating pressure, volume and temperature of a gas is called ideal gas equation

A refrigeration cycle is the same as a __________ cycle, (A) Turbine (B) Heat engine (C) Reversed heat engine (D) None of these

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Co-efficient of Performance (COP) of a refrigerator is the ratio of the (A) Work required to refrigeration obtained (B) Refrigeration obtained to the work required (C) Lower to higher temperature (D) Higher to lower temperature

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Last Answer : (B) Refrigeration obtained to the work required

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

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.

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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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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 most efficient heat engine that can operate between two temperature reservoirs T1 and T2 is: w) jet engine x) internal combustion engine y) Carnot engine (pron: car-no) z) steam engine

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Heat pump (A) Accomplishes only space heating in winter (B) Accomplishes only space cooling in summer (C) Accomplishes both (A) and (B) (D) Works on Carnot cycle

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Efficiency of a heat engine working on Carnot cycle between two temperature levels depends upon the (A) Two temperatures only (B) Pressure of working fluid (C) Mass of the working fluid (D) Mass and pressure both of the working fluid

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Last Answer : (A) Two temperatures only

A Carnot cycle consists of the following steps: (A) Two isothermal and two isentropic (B) Two isobaric and two isothermal (C) Two isochoric and two isobaric (D) Two isothermals and two isochoric

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The shape of T-S diagram for Carnot Cycle is a (A) Rectangle (B) Rhombus (C) Trapezoid (D) Circle

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Thermodynamic cycle involved in the working of a thermal power plant is the __________ cycle. (A) Joule (B) Carnot (C) Rankine (D) Brayton

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Ammonia-absorption refrigeration cycle requires (a) very little work input (b) maximum work input (c) nearly same work input as for vapour compression cycle (d) zero work input

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Which of the following has the least thermal efficiency? (A) Steam engine (B) Carnot engine (C) Diesel engine (D) Otto engine

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