Thermodynamics Set 10

Mechanical Engineering

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This set of Thermodynamics Multiple Choice Questions & Answers (MCQs) focuses on Thermodynamics Set 10

Q1 | The efficiency of a Rankine cycle may be expected to
Q2 | A heat engine works on a Carnot cycle with a heat sink at a temperature of 27?C. The efficiency of the engine is 10%, the temperature of the heat source is
Q3 | All of the following cycles consist of two isentropic processes EXCEPT
Q4 | 1 micron is equivalent to
Q5 | A system consisting of more than one phase is known as
Q6 | In which case the work done per kg of air compressed from 1.05 ata, 15?C to 6.3 ata is minimum
Q7 | Thermei is
Q8 | Heat flows from hot substance to cold substance unaided". The name associated with the above statement is
Q9 | The concept of black body in heat transfers applies to
Q10 | A solar cell system is to suppmy 1050 kWh/month. The average output is 15 percent of the rated power. The rated power must be
Q11 | Most of gases exhibit drop in temperature upon expansion. However, this may not be true in case of
Q12 | The extension and compression of a helical spring is an example of
Q13 | In a Carnot cycle if isothermal compression process is continued bit longer than the normal, then the adiabatic compression will cause the steam to arrive at the inner dead center at a temperature
Q14 | Which of the following cycle consists of two constant pressure and two adiabatic processes?
Q15 | One litre of gas A and two litres of gas B. both having same temperature 100?C and same pressure 2.5 bar will have the ratio of kinetic energies of their molecules as
Q16 | Diesel cycle processes are
Q17 | Which of the following cycle is less efficient than the remaining?
Q18 | The function of a clutch in automobiles
Q19 | The rate of heat flow from a 50 mm thick wall of material having thermal conductivity of 40 W/m?C for a temperature difference of 10?C will be
Q20 | According to the Kinetic theory of gases the collision between the molecules are assumed to be
Q21 | An isolated system
Q22 | If during a process, the entropy of the isolated system increases, the process is
Q23 | A constant volume gas thermometer closely follows
Q24 | In a thermal power plant thermodynamic cycle used is
Q25 | According to Boyle's law PV = C when the temperature is constant. In this relation the magnitude of C depends upon
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