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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