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Applied Thermodynamics Questions

  A single-stage double acting compressor has a free air delivery of 14 m3/min, measured at 1.013 bar and 15 oC. Pressure an temperature in cylinder during induction are 0.95 bar and 32 oC. The delivery pressure is 7 bar and index of compression is n=1.3. If clearance volume is 5% of swept volume, find: ¬†indicated power required and ¬†volumetric efficiency
(class: BE/BTech - Common Subjects )    Applied Thermodynamics

  In a single-stage impulse turbine the mean diameter of the blade ring is 1 m and rotational speed 3000 r.p.m. Steam is issued from nozzle at 300 m/s at an angle of 20 . The blades are equiangular. If the frictional losses in blade channel are 19% of kinetic energy corresponding to relative velocity at inlet of blades, what is the power developed when axial thrust on blades is 98 N?
(class: BE/BTech - Common Subjects )    Applied Thermodynamics

  Describe Lancashire boiler with the help of a diagram giving its construction and working.
(class: BE/BTech - Common Subjects )    Applied Thermodynamics

  Describe the working of single-stage reciprocating compressor.
(class: BE/BTech - Common Subjects )    Applied Thermodynamics

  The vacuum at the extraction pipe in a condenser is 710 mm of Hg when the barometer reading is 760 mm of Hg and temperature is 35.82 oC. Air leakage into condenser is 4 kg per 10000 kg of steam. Determine: air dealt by dry air pump per kg of steam. And ¬†mass of water vapour associated with this air.
(class: BE/BTech - Common Subjects )    Applied Thermodynamics

  Prove that condition for maximum discharge through a convergent-divergent nozzle is sonic velocity at throat.
(class: BE/BTech - Common Subjects )    Applied Thermodynamics

  A simple Rankine cycle works between 28 bar and 0.06 bar. Calculate cycle efficiency, work ratio and specific steam consumption if steam is initially dry saturated.
(class: BE/BTech - Common Subjects )    Applied Thermodynamics

  Describe feed check valve with the help of a neat diagram.
(class: BE/BTech - Common Subjects )    Applied Thermodynamics

  What is the best value of index of compression?
(class: BE/BTech - Common Subjects )    Applied Thermodynamics

  What is meant by optimal multi-staging?
(class: BE/BTech - Common Subjects )    Applied Thermodynamics

  List the various uses of compressed air.
(class: BE/BTech - Common Subjects )    Applied Thermodynamics

  What is condenser efficiency?
(class: BE/BTech - Common Subjects )    Applied Thermodynamics

  Define blade efficiency
(class: BE/BTech - Common Subjects )    Applied Thermodynamics

  What is stage efficiency?
(class: BE/BTech - Common Subjects )    Applied Thermodynamics

  What is the effect of friction on flow through nozzles?
(class: BE/BTech - Common Subjects )    Applied Thermodynamics

  Sketch combined reheat and regenerative cycle.
(class: BE/BTech - Common Subjects )    Applied Thermodynamics

  Sketch simple Rankine cycle on p-V and T-S diagrams
(class: BE/BTech - Common Subjects )    Applied Thermodynamics

  What is the importance of equivalent evaporation?
(class: BE/BTech - Common Subjects )    Applied Thermodynamics

  Describe the function of the impeller and diffuser in a centrifugal compressor.
(class: BE/BTech - Common Subjects )    Applied Thermodynamics

  The centrifugal compressor of a gas turbine requires 3000 H.P. when running at 16000 r.p.m. The tip diameter of the impeller is 50 cm and the uniform width of casting of he vortex chamber between impeller and diffuser is 4 cm. Measurement show that static pressure and temperature at a radius of 27 cm are 2.5 kgf/cm2 and 110 oC. The atmosphere in the test house is 1 kgf/cm2. Assuming slip factor 0.94 and neglecting friction in the vortex chamber calculate the mass flow.
(class: BE/BTech - Common Subjects )    Applied Thermodynamics

  Describe briefly the distinction between rotary compressors and the reciprocating piston compressor.
(class: BE/BTech - Common Subjects )    Applied Thermodynamics

  Air is compressed from initial pressure of 1 bar and temperature 290 K t a pressure of 5 bar. Taking ? for air =1.4, Cp=1.00 kJ/kg K, calculate per kg of air delivered, the work expended if the compression is to be frictionless isothermal.
(class: BE/BTech - Common Subjects )    Applied Thermodynamics

  Compare the compression ignition engine with a petrol engine of similar capacity with special reference to maximum pressure, maximum speed, power weight ratio and applications.
(class: BE/BTech - Common Subjects )    Applied Thermodynamics

  What features of the turbojet engine and the reciprocating engine are combined to give the turbo prop engine?
(class: BE/BTech - Common Subjects )    Applied Thermodynamics

  A turbojet engine flying at a speed of 800 km/hr consumes air at the rate of 45 kg/s. Given that the enthalpy change for the nozzle is 44l5 kcal/kg and the velocity coefficient is 0.95, calculate the thermal efficiency of the plant given ? combustion is 95% and calorific value of the fuel used is 10500kcal/kg.
(class: BE/BTech - Common Subjects )    Applied Thermodynamics

  A multistage axial flow compressor absorbs 6000 H.P. when delivering 20 kg/s of air from stagnation condition of 1 kgf/cm2 and 288K. If polytropic efficiency of compression is 0.9 and if the stage stagnation pressure ratio is constant, calculate pressure at compressor outlet.
(class: BE/BTech - Common Subjects )    Applied Thermodynamics

  Explain the difference between an adiabatic and isentropic process.
(class: BE/BTech - Common Subjects )    Applied Thermodynamics

  Give a detailed not on I.C. Engine versus steam engine.
(class: BE/BTech - Common Subjects )    Applied Thermodynamics

  Define propulsion efficiency.
(class: BE/BTech - Common Subjects )    Applied Thermodynamics

  Give he schematic arrangement of a Ramjet propulsion unit.
(class: BE/BTech - Common Subjects )    Applied Thermodynamics

    

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