Mechanical Engineering MCQs

Page No. 113

The condition of perfect vacuum, i.e., absolute zero pressure can be attained at ____________________?


aa temperature of – 273.16°C


ba temperature of 0°C


ca temperature of 273 °K


da negative pressure and 0°C temperature



Absolute zero pressure will occur _____________________?


aat sea level


bat the center of the earth


cwhen molecular momentum of the system becomes zero


dunder vacuum conditions



Kinetic energy of the molecules in terms of absolute temperature (T) is proportional to________________?


aT


bj


cJ2


dVr


View Answer T

Kinetic theory of gases assumes that the collisions between the molecules are________________?perfectly elastic


aperfectly elastic


bperfectly inelastic


cpartly elastic


dpartly inelastic


View Answer perfectly elastic

Temperature of a gas is produced due to________________?


aits heating value


bkinetic energy of molecules


crepulsion of molecules


dattraction of molecules



The unit of pressure in S.I. units is____________________?


akg/cm2


bmm of water column


cpascal


ddynes per square cm


View Answer pascal

According to Dalton’s law, the total pres sure of the mixture of gases is equal to________________?


agreater of the partial pressures of all


baverage of the partial pressures of all


csum of the partial pressures of all


dsum of the partial pressures of all divided by average molecular weight



An ideal gas as compared to a real gas at very high pressure occupies_________________?


amore volume


bless volume


csame volume


dunpredictable behaviour


View Answer more volume

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


awatt


bjoule


cjoule/s


djoule/m


View Answer joule

The unit of mass in S.I. units is ____________________?


akilogram


bgram


ctonne


dquintal


View Answer kilogram

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