Mechanical Engineering MCQs

Page No. 100

According to kinetic theory of gases, the absolute zero temperature is attained when___________________?


avolume of the gas is zero


bpressure of the gas is zero


ckinetic energy of the molecules is zero


dspecific heat of gas is zero



No liquid can exist as liquid at____________________?


a– 273 °K


bvacuum


czero pressure


dcentre of earth


View Answer zero pressure

The pressure’of a gas in terms of its mean kinetic energy per unit volume E is equal to________________?


aE/3


bE/2


c3E/4


d2E/3


View Answer 2E/3

Superheated vapour behaves___________________?


aexactly as gas


bas steam


cas ordinary vapour


dapproximately as a gas



Intensive property of a system is one whose value____________________?


adepends on the mass of the system, like volume


bdoes not depend on the mass of the system, like temperature, pressure, etc


cis not dependent on the path followed but on the state


dis dependent on the path followed and not on the state



Characteristic gas constant of a gas is equal to______________________?


aC/Cv


bCv/Cp


cCp – Cv


dCp + Cv


View Answer Cp – Cv

The ratio of two specific heats of air is equal to____________________?


a0.17


b0.24


c0.1


d1.41


View Answer 1.41

Which law states that the internal energy of a gas is a function of temperature__________________?


aCharles’ law


bJoule’s law


cRegnault’s law


dBoyle’s law


View Answer Joule’s law

Which law states that the specific heat of a gas remains constant at all temperatures and pressures______________________?


aCharles’ Law


b Joule’s Law


cRegnault’s Law


dBoyle’s Law


View Answer Regnault’s Law

An open 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



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