For pressure ratio = 1, efficiency = 0, then?

Related MCQs

• Considerfollowing options for a simple Rankine cycle i) increasing pressure at exist of turbine ii) increasing average temperature of heat addition iii) decreasing pressure at exit of turbine iv) superheating of steam v) decreasing pressure during superheating. Which combination of above will increase Rankine efficiency?
• ……… is the ratio of actual cycle efficiency to that of the ideal cycle efficiency
• Which of the following is true?(here pa=partial pressure of dry air, pw=partial pressure of water vapour, p=atmospheric pressure)
• Both first law efficiency and second law efficiency indicate how effectively the input has been converted into the product.
• Consider the following statements regarding superheating in Rankine Cycles 1. It reduces the specific steam consumption 2. It increases the dryness fraction of steam at the exhaust for the same value of condenser pressure 3. It reduces the cycle efficiency Of the these statements
• The first law efficiency is defined as the ratio of the output energy to the input energy.
• During a constant pressure expansion of a gas 33.3 % heat is converted into work while the temperature rises by 20K. The specific heat of gas at constant pressure is
• Rankine cycle operating on low pressure limit of p1 & high pressure limit p2
• A power cycle using steam as working fluid consist of i) constant pressure heat addition ii)adiabatic expansion iii) constant pressure heat rejection & iv) adiabatic compression. The cycle is
• The optimum reheat pressure for most of the power plants is how many times of the initial steam pressure?