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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 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 AnswerWhich sequence outlines how electricity is generated from a fossil fuel?1 AnswerWrite brief notes on the operation of open cycle gas turbine with a labeled diagram. Mention its advantages and disadvantages.1 AnswerThe values of enthalpy of steam at the inlet and outlet of a steam turbine in a Rankine cycle -gate-mechanical-20111 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 internal energy of an ideal gas is a function of Gate-20161 AnswerThe pressure that does not have any measurable influence on the void ratio or shearing resistance of the soil mass is. GATE- Agricultural Engineering- 20132 AnswerWith a neat sketch explain the working of Parson’s turbine.1 AnswerA certain amount of an ideal gas is initially at a pressure P1 and temperature T1. First, it undergoes a constant pressure process 1-2 such that T2 = 3T1/4. Then, it undergoes a constant volume process 2-3 such that T3 = T1/2. The ratio of the final 1 AnswerExplain the working principle of Delaval’s turbine with a neat sketch.2 AnswerDefine an impulse turbine and explain its operation with a neat sketch.1 AnswerExplain the principle of operation of Kaplan turbine with the help of a neat sketch and also mention its application, advantages and disadvantages.1 AnswerThe ideal static pressure coefficient of a diffuser with an area ratio of 2.0 is GATE-Aerospace Engineering-Question-20121 AnswerThe intake pressure of a diesel engine is 1 bar and pressure at the end of the compression is 34 bar. The adiabatic exponent is 1.3 and the expansion ratio is 7. The diesel cycle efficiency in percentage is __________________ Gate-Agricultural-20161 AnswerA water pumping system is being driven by a propeller type wind turbine having the power coefficient of 0.4. The total pumping head and rate of discharge are 20 m and 7.0 L s^-1, respectively. Mean wind velocity is 18 km h^-1 and the density of air i1 Answer