GATE Previous years Thermodynamics questions GATE 2012 Thermodynamics solved questions set 1 By Rutuja Bothara

RUTUJA BOTHARA . Perusing B.Tech in Mechanical Engineering from Vellore Institute of Technology, Vellore. (2015-2019) e Cleared JEE Mains 2015 Cleared VITEEE-2015 with AIR 8718 Cracked HITSEEE-2015 with AIR 91 . Worked as a Career Counsellor in Teachers Academy (2016- 2018) and BOLO app. https://unacademy.com/user/rurutujajb96- 9511

Steam enters an adiabatic turbine operating at steady state with an enthalpy of 3251.0 kJ/kg and leaves as a saturated mixture at 15 kPa with quality (dryness fraction) 0.9. The enthalpies of the saturated liquid and vapor at 15 kPa are hf 225.94 kJ/kg and hg 2598.3 kj/kg respectively. The mass flow rate of steam is 10 kg/ s. Kinetic and potential energy changes are negligible. The power output of the turbine in MW is (A) 6.5 (B) 8.9 (C) 9.1 (D) 27.0

Entholey at the exit of the tuebine is ha 22s 9425 g.3 22s.3 out put S given by 3251-236\)

An ideal gas of mass m and temperature T1 undergoes a reversible isothermal process from an initial pressure P1 to final pressure P2. The heat loss during the process is Q. The entropy change of the gas is (A) mR n 2 (B) mRIn (D) zero

Entropy change is Jiven by Pi For constandt tempetatane Pi

Air enters an adiabatic nozzle at 300 kPa, 500 K with a velocity of 10 m/s. It leaves the nozzle at 100 kPa with a velocity of 180 m/s. The inlet area is 80 cm 2. The specific heat of air cp is 1008 J/kg K. The exit temperature of the air is (A) 516 K (B) 532 K (C) 484 K (D) 468 K

sing Steadrsy equashien Ho eher 200O 2 cpTo 2000 2000 2000 2OOO To =484 K

The exit area of the nozzle in cm 2 is (A) 90.1 (B) 56.3 (C) 4.4 (D) 12.9

Densit^ can be orit-en as Usins the mass balance 2. Ao = 12-g cm

Thesimal efficiency of Brayton yle is

specific enthapy s given by

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Rutuja Bothara

Strengthen GATE /PSU/ESE/SSC JE/RRB JE /campus Placements preparation.
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Payal jain

a year ago

Thankew ma'am ...cover all topics,
pape 4th

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