Top 350+ Solved Thermodynamics MCQ Questions Answer
Q. The energy required to heat 1 gm of water from 0?F to 0?C will be nearly
a. 32 cal
b. 74.6 J
c. Pulsejet
d. zero
e. 32 J
Q. For a gas the difference between the values of Cp and Cv aceounts for
a. external work done
b. increased kinetic energy of molecules
c. increase in volume is more rapid as compared to that of pressure
d. None of the above
e. Pulsejet
Q. The critical pressure at which latent heat of vaporisation for water is zero is
a. 250.6 kg/cm2
b. 100 kg/cm2
c. 228.6 kg/cm2
d. 235.6 kg/cm2
e. 215.1 kg/cm2
Q. Brayton cycles processes are
a. Two isothermals constant volume a constant pressure
b. One constant pressure, one constant volume, two adiabatics
c. Two isentropics and two constant pressure
d. Two isothermals and two isentropics
e. Two isentropics and two constant volume
Q. A gas which obeys kinetic theory perfectly is known as
a. Diatomic gas
b. Monoatomic gas
c. Perfect gas
d. Pure gas
e. Real gas
Q. In an automobile the gear box is fitted between
a. Differential and wheels
b. Engine and clutch
c. Engine and flywheels
d. Clutch and wheels
e. Clutch and differential
Q. In an isothermal process
a. Pressure remains constant
b. Inter-molecular energy remain constant
c. Temperature remains constant
d. Kinetic energy remains constant
e. Volume remains constant
Q. Which of the following gas has the highest values for the adiabatic index?
a. Air
b. Helium
c. Methane
d. Oxygen
e. Nitrogen
Q. The mixing process of two fluids is always considered as
a. reversible or irreversible depending upon the gases involved
b. Pulsejet
c. reversible
d. irreversible
Q. In which of the following energy conversion takes place at ambient temperature?
a. Solar radiation
b. Pulsejet
c. Thermionic generator
d. Magnetohydrodynamic conversion
e. Battery producing electrical energy
Q. If the sun becomes twice as hot
a. its output of radiation energy will fall
b. it will radiate predominantly in infra-red
c. it will disintegrate into fragments
d. Pulsejet
e. it will radiate predominantly ultraviolet
Q. On a temperature-entropy diagram the slope of constant pressure line is given by
a. S/T
b. Cv/T
c. T/Cp
d. T/Cv
e. T/S
Q. Planck's law of radiation is applicable to
a. Radiation of any kind
b. Temperature radiation
c. Monochromatic radiation
d. Thermal radiation
e. None of the above
Q. Identify the correct statement
a. Thermal conductivity is independent of temperature
b. Thermal conductivity increases with time
c. Thermal conductivity varies with temperature
d. Thermal conductivity increases with molecular weight
e. Thermal conductivity increases as the rate of heat flow increases
Q. In a closed system, the change in enthalpy will be equal to the heat transferred when a reversible process takes place at constant
a. Pressure
b. Volume
c. Entropy
d. Temperature
e. Internal energy