Thermodynamics Set 15

Mechanical Engineering

Learning Mode Previous Next
On This Page

This set of Thermodynamics Multiple Choice Questions & Answers (MCQs) focuses on Thermodynamics Set 15

Q1 | An elastic sphere of 0.5 m diameter contains a gas at 115 k Pa. Heating of the sphere causes it to increase to 0.62 m and during the process the pressure is proportional to the sphere diameter. The work done by the gas will be
Q2 | Second law of theromodynamics defines
Q3 | In a reversible polytropic process
Q4 | Entropy of the universe tends to
Q5 | Isothermals are curves obtained by drawing
Q6 | In an isothermal expansion of gases
Q7 | A machine that continuously creates its own energy is known as
Q8 | When a direct current is passed through a junction of two dissimilar metals, the junction becomes either cold or hot. The phenomenon is known as
Q9 | Brayton cycle cannot be used in reciprocating engines even for same adiabatic compression ratio and work output because
Q10 | Which of the following relations is not valid during throttling process?
Q11 | Two ideal engines A and B have their sources at 600 k and 400 k and their sinks at 300 k and 250 k respectively. What inference can be drawn about their efficiency
Q12 | A law which is applicable only to ideal vapours and liquids, that equates the equilibrium partial pressures of a solution component in the coexisting phases, is known as
Q13 | A barn is
Q14 | Highly polished surfaces of a thermosflask prevent heat by
Q15 | As we go up in air the temperature of air decreases because
Q16 | According to kinetic theory of heat
Q17 | Balanced draft incorporates
Q18 | The internal energy of an ideal gas is
Q19 | In any process the maximum amount of mechanical energy that can be converted to heat
Q20 | The characteristic equation of gases pv = nRT holds good for
Q21 | The external work donw is zero all the following cases EXCEPT
Q22 | If a process can be stopped at any stage and reversed so that the system and surroundings are exactly restored to their initial states, it is known as
Q23 | Which of the following does not change during an-ideal throttling process?
Q24 | The process in which no heat enters or leaves the system is called
Q25 | Which is incorrect statement about the reversible process?
Previous Next