In which case the heat transferred from the air when compressed from 1 ata 15?C to 6 ata would be maximum
A.Adiabatic
B.Isothermal
C.Polytropic pv1.3 = C
D.Polytropic pv1.31 = C
E.Polytropic pv1.35 = C
Category: Mechanical Engineering Mcqs
The adiabatic throttling process of a perfect gas is one of constant
A.kinetic energy
B.enthalpy
C.potential energy
D.pressure
Escalators have the advantage of
A.continuity of motion
B.greater capacity
C.small space requirement
D.all of the above
Rochelle salts are used
A.For colour identification
B.For photography
C.For polarisation
D.As piezoelectric crystals
E.As dectors of gamma rays
In case the value of variance is more, then
A.certainly is more
B.probability of certainty is more
C.uncertainty is more
D.None of the above
In case the relative humidity of atmospheric air is 100% the rate of evaporation of water will be
A.Half the water already air
B.Half the water already air
C.Very high
D.Slow
E.Zero
In a Carnot cycle the heat is rejected at
A.Constant volume
B.Constant pressure
C.Constant temperature
D.Constant enthalpy
E.Constant entropy
Which material has highest value of Poisson’s ratio
A.Steel
B.Copper
C.Concrete
D.Rubber
E.Wood
Alpha brass is a (an)
A.Inermediate phase
B.Interstitial compound
C.Substitutional solid solution
D.None of the above
Otto cycle consists of the set of processes as
A.Two isentropics and two constant volumes
B.Two isentropics and two constant pressure
C.Two adiabatic and two isothermal
D.Two isothermal and two constant volume
E.Two isothermal and two constant pressure
