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A 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 AnswerIn a gas turbine the pressure ratio is 10. Temperature of gas at the inlet of turbine is 300 K. 1 AnswerWhich one of the following statement is TRUE?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 AnswerIn the Rankine cycle for a steam power plant the turbine entry and exit enthalpies are 2803 kJ/kg and 1800 kJ/kg, respectively. The enthalpies of water at pump entry and exit are 121 kJ/kg and 124 kJ/kg, respectively. The specific steam consumption (in kg/k W.h) of the cycle is _______1 AnswerWrite brief notes on the operation of open cycle gas turbine with a labeled diagram. Mention its advantages and disadvantages.1 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 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 AnswerThe stagnation temperatures at the inlet and exit of a combustion chamber are 600 K and 1200 K, respectively GATE-Aerospace Engineering-Question-20121 AnswerIn a counter-flow heat exchanger, water is heated at the rate of 1.5kg/s from 40°C to 80°C by an oil entering at 120°C and leaving at 60°C. The specific heats of water and oil are 4.2kJ/kg/K and 2kJ/kg.K respectively. The overall heat transfer coefficient is 400 W/m2 .K. The required heat transfer surface area (in m2) is1 AnswerIn a counter-flow heat exchanger, water is heated at the rate of 1.5kg/s from 40°C to 80°C by an oil entering at 120°C and leaving at 60°C. The specific heats of water and oil are 4.2kJ/kg/K and 2kJ/kg.K respectively. The overall heat transfer coefficient is 400 W/m2 .K. The required heat transfer surface area (in m2) is1 AnswerFind the minimum power required to maintain the flow of liquid in a pipe for a pressure drop of 100 kPa.1 AnswerDefine specific heat capacity at constant pressure.1 AnswerDefine specific heat capacity at constant pressure.1 AnswerWith a neat sketch explain the working of Parson’s turbine.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 AnswerFor a gas turbine power plant, identify the correct pair of statements. (Gate mechanical engineering 2014)1 AnswerFor a rotameter, which one of the following statements is TRUE? GATE-Instrumentation-Engineering-20141 Answer