Thermodynamics objective questions with answers part1

Q1. In a Carnot cycle, heat is transferred at
(A) constant pressure
(B) constant volume
(C) constant temperature
(D) constant enthaply

Q2. Carnot cycle efficiency is maximum when
(A) initial temperature is 0°K
(B) final temperature is 0°K
(C) final temperature is 0°C
(D) initial temperature is 0°K.

Q3. Carnot cycle efficiency depends upon
(A) properties of the medium/substance used
(B) condition of engine
(C) working condition
(D) temperature range of operation

Q4. According to first law of thermodynamics
(A) mass and energy are mutually convertible
(B) heat and work are mutually convertible
(C) mass and work are mutually convertible
(D) heat flows from hot substance to cold substance.

Q5. Change in internal energy in a closed system is equal to heat transferred if the reversible process takes place at constant
(A) pressure
(B) temperature
(C) volume
(D) entropy

Q6. Isochoric process is one in which
(A) very little mechanical work is done by the system
(B) no mechanical work is done by the system
(C) all parameters remain constant
(D) mass and energy transfer do not take place.

Q7. The process in which no heat transfer takes place through boundaries is called as
(A) isothermal process
(B) adiabatic process
(C) isochoric process
(D) none of the above

Q8. Heat flow is a quantity of heat transfer
(A) within definite time
(B) within definite cross-sectional area
(C) within definite volume of the system
(D) none of these

Q9. For reversible adiabatic process, change in entropy is
(A) maximum
(B) minimum
(C) zero
(D) negative

Q10. For a thermodynamic process to be reversible, the temperature difference between hot body and working substance should be
(A) zero
(B) minimum
(C) maximum
(D) 273

Q11. A quasi-static process has main characteristics as it is
(A) a stationary process
(B) an infinitely slow process
(C) a random process
(D) a spontaneous process

Q12. Heat transfer is
(A) point function
(B) path function
(C) transfer function
(D) none of these

Q13. In a free expansion process
(A) work done is zero
(B) heat transfer is zero
(C) Both of these
(D) None of these

Q14. Which of the following statements about Zeroth law of thermodynamics is correct
(A) deals with conversion of mass and energy
(B) deals with reversibility and irreversibility of process
(C) states that if two systems are both in equilibrium with a third system, they are in thermal equilibrium with each other
(D) deals with heat engines

Q15. Expand the term N.T.P
(A) nominal temperature and pressure
(B) natural temperature and pressure
(C) normal temperature and pressure
(D) normal thermodynamic pressure.

Q16. Heat and work are:
(A) point functions
(B) system properties
(C) path functions
(D) intrinsic properties

Q17. Work done in an adiabatic process between a given pair of end states depends on
(A) the end states only
(B) particular adiabatic process
(C) the value of index n
(D) mass of the system

Q18. According to Avogadro’s law, for a given pressure and temperature, each molecule of a gas occupies
(A) volume proportional to its molecular weight
(B) volume proportional to its specific weight
(C) volume inversely proportional to its specific weight
(D) same volume

Q19. Properties like pressure and temperature in thermodynamic coordinates are
(A) path functions
(B) point functions
(C) cyclic functions
(D) real functions

Q20. Which of the following law states that, the internal energy of a gas is a function of temperature
(A) Charles’ law
(B) Joule’s law
(C) Boyle’s law
(D) Avagadros law