Mechanical Engineering MCQs

Page No. 99

The property of a material which enables it to resist fracture due to high impact loads is known as__________________?


aelasticity


bendurance


cstrength


dtoughness


View Answer toughness

Which of the following variables controls the physical properties of a perfect gas_________________?


apressure


btemperature


cvolume


dall of the above


View Answer all of the above

The unit of time in S.I. units is__________________?


asecond


bminute


chour


dday


View Answer second

Which of the following laws is applicable for the behavior of a perfect gas__________________?


aBoyle’s law


bCharles’law


cGay-Lussac law


dall of the above


View Answer all of the above

The unit of temperature in S.I. units is _________________?


aCentigrade


bCelsius


cFahrenheit


dKelvin


View Answer Kelvin

The unit of length in S.I. units is________________?


ameter


bcentimeter


ckilometer


dmillimeter


View Answer meter

According to Gay-Lussac law for a perfect gas, the absolute pressure of given mass varies directly as____________________?


atemperature


babsolute


cabsolute temperature, if volume is kept constant


dvolume, if temperature is kept constant



General gas equation is____________________?


aPV=nRT


bPV=mRT


cPV = C


dPV=KiRT


View Answer PV=mRT

Which of the following can be regarded as gas so that gas laws could be applicable, within the commonly encountered temperature limits ?


a02, N2, steam, C02


bOz, N2, water vapour


cS02, NH3, C02, moisture


d02, N2, H2, air


View Answer 02, N2, H2, air

A closed system is one in which_________________________?


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


bmass crosses the boundary but not the energy


cneither mass nor energy crosses the boundaries of the system


dboth energy and mass cross the boundaries of the system



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