Related Questions

If a man cycles at 10 km/hr, then he arrives at a certain place at 1 pm. If he cycles at 15 km/hr, he will arrive at the same place at 11 am. At what speed must he cycles to get there at noon?
A 11 km/hr
B 12 km / hr
C 13 km / hr
D 14 km / hr
The expression for the work done for a reversible polytropic process can be used to obtain the expression for work done for all processes, except reversible __________ process.
A Isobaric
B Isothermal
C Adiabatic
D None of these
If both Stirling and Carnot cycles operate within the same temperature limits, then efficiency of Stirling cycle as compared to Carnot cycle
A More
B Less
C Equal
D Depends on other factors
If a man cycles at 10 km/hr , then he arrives at a certain place at 1 pm . If he cycles at 15km/hr, arrive at the same place at 11am . At what speed must he cycels to get there at noon ?
A 11km/hr
B 12km/hr
C 13km/hr
D 14km/hr
In order that a cycle be reversible, following must be satisfied
A Free expansion or friction resisted expansion/compression process should not be encountered
B When heat is being absorbed, temperature of hot source and working substance should be same
C When beat is being rejected, temperature of cold source and working substance should be same
D All of the above
Otto cycle efficiency is higher than Diesel cycle efficiency for the same compression ratio and heat input because in Otto cycle
A Heat rejection is lower
B Expansion and compression are isentropic
C Combustion is at constant volume
D Maximum temperature is higher
Which of the following processes can not be made reversible even under ideal condition of operation?
A Free expansion of a gas
B Compression of air in a compressor
C Expansion of steam in a turbine
D All of the above
Which of the following is not a reversible process ?
A Expansion of an ideal gas against constant pressure
B Atmospheric pressure vaporisation of water at 100°C
C Solution of NaCl in water at 50°C
D None of these
Which of the following is not reversible?
A Joule effect
B Peltier effect
C Seebeck effect
D Thomson effect
Which of the following is not correct for a reversible adiabatic process?
A $${\text{T}}{{\text{V}}^{\gamma - 1}}$$  = constant
B $${{\text{P}}^{1 - \gamma }}.{{\text{T}}^{\text{Y}}}$$  = constant
C $${\text{P}}{{\text{V}}^\gamma }$$  = constant
D None of these

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