Mechanical Engineering MCQs

Page No. 112

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


apressure

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btemperature

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cspecific volume

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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

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dmass crosses the boundary but not the energy

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


adivided by its molecular weight

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bmultiplied by its molecular weight

✓


cmultiplied by its density

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dmultiplied by its specific weight

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Work done in a free expansion process is___________________?


a+ ve

✖


b-ve

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czero

✓


dmaximum

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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

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

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dgases have two values of specific heat

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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

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bBoyle’s law

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cRegnault’s law

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dCharles’ law

✓


View Answer Charles’ law

The same volume of all gases would represent their____________________?


adensities

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bspecific weights

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cmolecular weights

✓


dgas characteristic constants

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View Answer molecular weights

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


aall ranges of pressures

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bonly small range of pressures

✓


chigh range of pressures

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dsteady change of pressures

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The behaviour of gases can be fully determined by___________________?


a1 law

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b2 laws

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c3 laws

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d4 laws

✓


View Answer 4 laws

Specific heat of air at constant pressure is equal to___________________?


a0.17

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b0.21

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c0.24

✓


d1.0

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View Answer 0.24

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