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

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bendurance

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cstrength

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dtoughness

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View Answer toughness

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


apressure

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btemperature

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cvolume

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dall of the above

✓


View Answer all of the above

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


asecond

✓


bminute

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chour

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dday

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View Answer second

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


aBoyle’s law

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bCharles’law

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cGay-Lussac law

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dall of the above

✓


View Answer all of the above

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


aCentigrade

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bCelsius

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cFahrenheit

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dKelvin

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View Answer Kelvin

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


ameter

✓


bcentimeter

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ckilometer

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dmillimeter

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View Answer meter

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


atemperature

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babsolute

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cabsolute temperature, if volume is kept constant

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dvolume, if temperature is kept constant

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General gas equation is____________________?


aPV=nRT

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bPV=mRT

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cPV = C

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dPV=KiRT

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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

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bOz, N2, water vapour

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cS02, NH3, C02, moisture

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d02, N2, H2, air

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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

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bmass crosses the boundary but not the energy

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cneither mass nor energy crosses the boundaries of the system

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dboth energy and mass cross the boundaries of the system

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