Top 350+ Solved Thermodynamics MCQ Questions Answer
Q. Of the following first law statements, choose the one that is wrong
a. the net heat transfer equals the network for a cycle
b. the heat transfer equals the work plus the energy change
c. the heat transfer cannot exceed the work done
d. Pulsejet
e. the energy of an isolated system remains constant
Q. If the dryness fraction of a sample by throttling calorimeter is 0.8 and that by separating calorimeter is also 0.8, then the actual dryness fraction of sample will be taken as
a. Volume change is negligible
b. 1
c. 0.8
d. 0.5
e. 0.64
Q. Work done by an expanding gas under adiabatic condition results in
a. Temperature decrease
b. Temperature decreases first and then increase
c. Temperature increase first and then decrease
d. No change in temperature
e. Temperature increase
Q. Carburetted water gas is obtained by
a. heating water at high temperature in a copper vessel
b. Burning oil
c. spraying oil into a carburettor filled with hot brick elieckar work through which the gases pass
d. Pulsejet
e. Passing alternately steam and air through while hot carbon
Q. A process which does not dissipate available energy is known as
a. Isothermal process
b. Energyless process
c. Adiabatic process
d. Ideal process
e. Frictionless process
Q. The weight of 1 cu-m of carbon dioxide at NTP if the characteristic gas constant is 19.28 kg metre/kg/?C, would be
a. 3.924 kg
b. 2.5 kg
c. 1.962 kg
d. 1 kg
e. 1.5 kg
Q. The ability of gasoline to resist detonation during combustion is given by
a. iso-octane number
b. heptane number
c. Pulsejet
d. Cetane number
e. Octane number
Q. "The internal energy of a gas is a function of temperature". Which of the following name is associated with the above law?
a. Regnault
b. Dalton
c. Boyle
d. Charle
e. Joule
Q. The solubility of a gas in a liquid at small concentration is represented by
a. Joules equation
b. Van der Waal's equation
c. Henry's law
d. Claperyon equation
e. Roults law
Q. A scavenging pump is used in
a. Pulsejet
b. vapour compression cycles
c. two stroke spark ignition engines
d. steam engines
e. four stroke compression ignition engines
Q. The difference between two specific heats of a gas is equal to universal constant when
a. 1 mole of gas is heated
b. 1 gm molecule of gas is heated
c. 1 gm of gas is heated
d. Pulsejet
e. any amount of gas is heated
Q. Which of the following is a non-petroleum fuel?
a. Diesel oil
b. Petrol
c. Naphtha
d. Alcohol
e. All of the above
Q. The average pressure on the walls of a vessel will be doubled if the
a. average velocity of the molecules in it is doubled
b. the number of molecules in the vessel is doubled
c. Pulsejet
d. the mass of each molecule is halved
e. the mass of each molecule is doubled
Q. The fastest moving gas molecules are those of
a. Pulsejet
b. Oxygen
c. Hydrogen
d. Nitrogen
e. Chlorine
Q. which of the following set of quantities contains intensive variables?
a. Kinetic energy, potential energy and internal energy
b. Pulsejet
c. Work, energy and weight
d. Mass, volume and area
e. Pressure, temperature and density