Exhaust gases from a engine possess
A.Potential energy
B.Kinetic energy
C.Chemical energy
D.Solar energy
E.Stored energy
Category: Thermodynamics Mcqs
Which of the following is not a positive displacement compressor?
A.Centrifugal compressor?
B.Single stage reciprocating compressor
C.Double acting reciprocating compressor
D.Roots blower
E.Vane type compressor
In all irreversible processes, the entropy of the system
A.Increases
B.Reduces to zero
C.Remains constant
D.Sometimes increases and sometimes decreases
E.Depends on medium
In an isothermal process change in internal energy
A.Decreases
B.Increases
C.Remains constant
D.Becomes zero
E.Depends on the friction and other factors
The adiabatic horse power required to deliver 4 cu. M per minute of free air from 1 ata and 15?C to a received pressure at 7 ata would be in the range
A.5 ? 7
B.7 ? 10
C.10 ? 15
D.15 ? 20
E.20 ? 25
Wavelength is generally measured in
A.km
B.m
C.cm
D.mm
E.microns
In the above problem work done is equal to
A.180 kcal
B.130 kcal
C.150 kcal
D.100 kcal
E.80 kcal
Out of the following materials which may be expected to have higher value of thermal conductivity?
A.Clay
B.Wood
C.Asbestos
D.Refractory brick
E.Nichrome
Thermal efficiency of most of the internal combustion engines lies in the range
A.90 to 100 percent
B.75 to 90 percent
C.50 to 75 percent
D.35 to 50 percent
E.20 to 35 percent
The value of universal gas constant in S.I. units is
A.8314 J/kg mole/?k
B.831.4 J/kg mole/?k
C.83.14 J/kg mole/?k
D.8.314 J/kg mole/?k
E.0.8314 J/kg mole/?k
