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In a gas turbine the pressure ratio is 10. Temperature of gas at the inlet of turbine is 300 K. 1 AnswerConsider a simple gas turbine (Brayton) cycle and a gas turbine cycle with perfect regeneration. In both the cycles, the pressure ratio is 6 and the ratio of the specific heats of the working medium is 1.4. The ratio of minimum to maximum temperature1 AnswerA calorically perfect gas (specific heat at constant pressure 1000 J/kg.K) enters and leaves a gas turbine with the same velocity. The temperatures of the gas at turbine entry and exit are 1100 K and 400 K, respectively. The power produced is 4.6 MW and heat escapes at the rate of 300 kJ/s through the turbine casing. The mass flow rate of the gas (in kg/s) through the turbine is1 AnswerWhich one of the following statement is TRUE?1 AnswerIn an ideal gas turbine cycle, the expansion in a turbine is represented by (GATE-Aerospace-Engineering-2018)1 AnswerFor a given inlet condition, if the turbine inlet temperature is fixed, what value of compressor efficiency given below leads to the lowest amount of fuel added in the combustor of a gas turbine engine? GATE- Aerospace1 AnswerConsider two engines P and Q. In P, the high pressu re turbine blades are cooled with a bleed of 5% from the compressor after the compression process and in Q the turbine blades are not cooled. Comparing engine P with engine Q, whi1 AnswerParson's turbine is0 AnswerParson's turbine is0 AnswerWhich sequence outlines how electricity is generated from a fossil fuel?1 AnswerA test is conducted on a one-fifth scale model of a Francis turbine under a head of 2 m and volumetric flow rate of 1 m3/s at 450 rpm. Take the water density and the acceleration due to gravity as 103 kg/m3 and 10 m/s2, respectively. Assume no losses both in model and prototype turbines. The power (in MW) of a full sized turbine while working under a head of 30 m is _______ (correct to two decimal places).1 AnswerWrite brief notes on the operation of open cycle gas turbine with a labeled diagram. Mention its advantages and disadvantages.1 AnswerAn axial compressor that generates a stagnation pressure ratio of 4.0, operates with inlet and exit stagnation temperatures of 300 K and 480 K, respectively. If the ratio of specific heats (𝛾) is 1.4, the isentropic efficiency of the compressor is (GATE-Aerospace-Engineering-2018 )1 AnswerThe values of enthalpy of steam at the inlet and outlet of a steam turbine in a Rankine cycle -gate-mechanical-20111 AnswerS elect the correct statement for 50% reaction stage in a steam turbine.1 AnswerIn an ideal Rankine cycle, steam enters the turbine at 10 MPa and 500 °C (ℎ = 3375.1 kJ/kg, 𝑠 = 6.5995 kJ/kg.K). It is cooled in the condenser at a pressure of 10 kPa. At 10 kPa, ℎ𝑓 = 191.81 kJ/kg, 𝑠𝑓 = 0.6492 kJ/kg.K, ℎ𝑔 = 2583.9 kJ/kg and 𝑠𝑔 = 8.1488 kJ/kg.K. The heat rejected in the condenser (in kJ/kg) is0 AnswerThe stagnation temperatures at the inlet and exit of a combustion chamber are 600 K and 1200 K, respectively GATE-Aerospace Engineering-Question-20121 AnswerThe pair of variables that always exhibit monotonic decrease with height in the atmosphere is1 AnswerIf the efficiencies of the boiler, turbine and generator are 85%, 45% and 95% respectively, then the efficiency of the power plant is0 AnswerMethane has compressibility factor value of 0.9 at reduced pressure of 1.0 and reduced temperature of 1.5. For propane, the critical temperature and pressure are 369.8 K and 42.48 bar, respectively. Take R = 8.314 kJ/kmol.K. Applying the principle of corresponding states, the molar volume of propane (in m3/kmol) at the same reduced pressure and temperature is0 Answer