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Chemical engineering thermodynamics
1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
Q41 ⇒ A system undergoes a change from a given initial state to a given final state either by an irreversible process or by a reversible process, then(where, Δ S1 and Δ SR are the entropy changes of the system for the irreversible and reversible processes respectively) Δ S1 is always > Δ SR [other wrong options] [Discuss in forum] Δ S1 is always < Δ SR Δ S1 is sometimes > Δ SR Δ S1 is always = Δ SR |
Q42 ⇒ Efficiency of a heat engine working on Carnot cycle between two temperature levels depends upon the two temperatures only. [other wrong options] [Discuss in forum] pressure of working fluid. mass of the working fluid. mass and pressure both of the working fluid. |
Q43 ⇒ A refrigerator may be termed as a heat pump [other wrong options] [Discuss in forum] heat engine Carnot engine none of these |
Q44 ⇒ Joule-Thomson co-efficient depends on the both (a) & (b). [other wrong options] [Discuss in forum] pressure. temperature. neither (a) nor (b). |
Q45 ⇒ In vapour compression refrigeration system, if the evaporator temperature and the condenser temperatures are -13°C and 37°C respetively, the Carnot COP will be 5.2 [other wrong options] [Discuss in forum] 6.2 0.168 data insufficient, can't be found out |
Q46 ⇒ No work is done by the system, when a reaction occurs at constant volume [other wrong options] [Discuss in forum] temperature pressure none of these |
Q47 ⇒ Which of the following is not an intensive property ? Volume [other wrong options] [Discuss in forum] Density Temperature Pressure |
Q48 ⇒ A thermodynamic system is taken from state A to B along ACB and is brought back to A along BDA as shown below in the P-V diag ACBDA [other wrong options] [Discuss in forum] P1ACBP2P1 ACBB1A1A ADBB1A1A |
Q49 ⇒ Joule-Thomson experiment is both(b) & (c) [other wrong options] [Discuss in forum] isobaric adiabatic isenthalpic |
Q50 ⇒ __________ calorimeter is normally used for measuring the dryness fraction of steam, when it is very low. A combination of separating & throttling [other wrong options] [Discuss in forum] Bucket Throttling Separating |
Q51 ⇒ Clausius - Clayperon equation is applicable to __________ equilibrium processes. all (a), (b) and (c) [other wrong options] [Discuss in forum] solid-vapor solid-liquid liquid-vapor |
Q52 ⇒ Pick out the correct statement. Efficiency of an Otto engine is higher than that of a diesel engine for the same compression ratio. [other wrong options] [Discuss in forum] Compression ratio of an Otto engine is comparatively higher than a diesel engine. Otto engine efficiency decreases with the rise in compression ratio, due to decrease in work produced per quantity of heat. Diesel engine normally operates at lower compression ratio than an Otto engine for an equal output of work. |
Q53 ⇒ Cv for an ideal gas is independent of both pressure and volume. [other wrong options] [Discuss in forum] does not depend upon temperature. is independent of pressure only. is independent of volume only. |
Q54 ⇒ Minimum number of phases that exists in a system is 1. Number of chemical species in a colloidal system is 2 [other wrong options] [Discuss in forum] 1 4 3 |
Q55 ⇒ Heat is added at constant pressure in an ideal __________ cycle. both (b) and (c) [other wrong options] [Discuss in forum] Stirling Brayton Rankine |
Q56 ⇒ Solid and liquid phases of a substance are in equilibrium at the both (b) and (c). [other wrong options] [Discuss in forum] critical temperature melting point. freezing point. |
Q57 ⇒ Heat requirement for decomposition of a compound into its elements is __________ that is evolved during the formation of that compound from its elements. the same [other wrong options] [Discuss in forum] less than greater than different than |
Q58 ⇒ Isentropic process means a constant __________ process. entropy . [other wrong options] [Discuss in forum] enthalpy pressure none of these |
Q59 ⇒ The first law of thermodynamics is a statement of conservation of energy [other wrong options] [Discuss in forum] heat momentum work |
Q60 ⇒ Entropy is a/an none of these [other wrong options] [Discuss in forum] state function macroscopic property extensive property |
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