Top 250+ Solved Engineering Thermodynamics MCQ Questions Answer
Q. The superheat or degree of superheat is given by
a. difference between the temperature of saturated liquid and saturation temperature
b. difference between the temperature of superheated vapour and saturation temperature
c. sum of the temperature of superheated vapour and saturation temperature
d. none of the mentioned
Q. Which of the following statement is true?
a. open heater is also known as contact-type heater
b. in an open type heater the extracted or bled steam is allowed to mix with the feedwater
c. in a closed heater, the fluids are not allowed to mix together
d. all of the mentioned
Q. Which of the following is true for an open heater?
a. it is simple, has low cost and low heat transfer capacity
b. a pump is required at each heater
c. both of the mentioned
d. none of the mentioned
Q. In a mixture of dry air and water vapour,
a. mole fraction of dry air = pa/p
b. mole fraction of water vapour = pw/p
c. both of the mentioned
d. none of the mentioned
Q. When pw is very small,
a. saturation temperature of water vapour at pw is less than atmospheric temperature
b. water vapour in air exists in superheated state
c. air is said to be in unsaturated state
d. all of the mentioned
Q. Relative humidity is defined as
a. (saturation pressure of pure water) / pw
b. pw / (saturation pressure of pure water)
c. (saturation pressure of pure water) / p
d. p / (saturation pressure of pure water)
Q. A reversible cycle has following processes.
a. 4 isothermal processes
b. 4 adiabatic processes
c. 2 isothermal and 2 adiabatic processes
d. none of the mentioned
Q. 2 STATEMENTS OF SECOND LAW AND ITS COROLLARIES. CARNOT CYCLE REVERSED CARNOT CYCLE, PERFORMANCE. CLAUSIUS INEQUALITY.
a. high, low, receives
b. low, high, receives
c. high, low, gives
d. low, high, gives
Q. Which one of the following statements iscorrect?
a. a) pressure is an extensiveproperty
b. b) density is an intensiveproperty
c. c) density is an extensiveproperty
d. d) temperature is anextensive property
Q. First law of thermodynamics deals with conservation of
a. a) mass
b. b) momentum
c. c) energy
d. d) heat
Q. Which one of the following processes orsystems does not involve heat
a. a) steady processes
b. b) isothermal processes
c. c) adiabatic processes
d. d) thermal processes
Q. Thermodynamic equillibrium is completely defined by the specification of
a. a) generalised displacements
b. b) internal energy
c. c) enthalpy
d. d) all of the above
Q. ………. Is not a property of the system
a. a) pressure
b. b) temperature
c. c) heat
d. d) specific volume
Q. In which of the following processes theexternal work done is not zero?
a. a) throttling
b. b) free expansion
c. c) constant volume process
d. d) constant pressureprocess
Q. The extension & compression of a helicalspring is an example of
a. a) irreversible process
b. b) reversible process
c. c) isothermal process
d. d) adiabatic process