Mechanical Engineering MCQs

Page No. 112

Which of the following quantities is not the property of the system__________________?


apressure


btemperature


cspecific volume


dheat


View Answer heat

An isolated system is one in which_____________________?


amass does not cross boundaries of the system, though energy may do so


bneither mass nor energy crosses the boundaries of the system


cboth energy and mass cross the boundaries of the system


dmass crosses the boundary but not the energy



To convert volumetric analysis to gravimetric analysis, the relative volume of each constituent of the flue gases is____________________?


adivided by its molecular weight


bmultiplied by its molecular weight


cmultiplied by its density


dmultiplied by its specific weight



Work done in a free expansion process is___________________?


a+ ve


b-ve


czero


dmaximum


View Answer zero

According to Avogadro’s Hypothesis ______________________?


athe molecular weights of all the perfect gases occupy the same volume under same conditions of pressure and temperature


bthe sum of partial pressure of mixture of two gases is sum of the two


cproduct of the gas constant and the molecular weight of an ideal gas is constant


dgases have two values of specific heat



According to which law, all perfect gases change in volume by l/273th of their original volume at 0°C for every 1°C change in temperature when pressure remains constant ____________________?


aJoule’s law


bBoyle’s law


cRegnault’s law


dCharles’ law


View Answer Charles’ law

The same volume of all gases would represent their____________________?


adensities


bspecific weights


cmolecular weights


dgas characteristic constants


View Answer molecular weights

Boyle’s law i.e. pV = constant is applicable to gases under ___________________?


aall ranges of pressures


bonly small range of pressures


chigh range of pressures


dsteady change of pressures



The behaviour of gases can be fully determined by___________________?


a1 law


b2 laws


c3 laws


d4 laws


View Answer 4 laws

Specific heat of air at constant pressure is equal to___________________?


a0.17


b0.21


c0.24


d1.0


View Answer 0.24

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