Thermodynamics Question And Answer For Competitive Exams
31. The efficiency of Carnot cycle is maximum for
(A) Gas engine
(B) Petrol engine
(C) Steam engine
(D) Reversible engine
32. Stirling and Ericson cycles are.
(A) Reversible cycles
(B) Irreversible cycles
(C) Quasi – static cycles
(D) Semi – reversible cycles
33. A cycle consisting of two adiabatic and two constant pressure processes is known as.
(A) Otto cycle
(B) Ericsson cycle
(C) Joule cycle
(D) Sterling cycle
34. Reversed joule cycle is called –
(A) Carnot cycle
(B) Rankine cycle
(C) Brayton cycle
(D) Dual cycle
35. Which of the following cycles has maximum efficiency –
(A) Rankine
(B) Stirling
(C) Carnot
(D) Braytaon
36. The following cycle is used for air craft refrigeration.
(A) Braytaon cycle
(B) Joule cycle
(C) Carnot cycle
(D) Reversed Brayton cycle
37. Diesel cycle efficiency is maximum when the cut off is –
(A) Increased
(B) Decreased
(C) Zero
(D) Maximum
38. The pressure ratio in case of Bell – Coleman cycle is of the order of –
(A) 5 – 6
(B) 7 – 9
(C) 10 – 15
(D) 15 – 22
39. A Bell – Coleman cycle is a reversed
(A) Carnot cycle
(B) Otto cycle
(C) Joule cycle
(D) Stirling cycle
40. Second law of thermodynamics defines.
(A) Entropy
(B) Enthalpy
(C) Heat
(D) Work
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