B.TechSemester 42021-22Applied ThermodynamicsKME401
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Applied Thermodynamics (KME401) - AKTU Question Paper 2021-22

B.Tech · Semester 4 · Free PDF Download

This is the official AKTU Applied Thermodynamics Previous Year Question Paper for B.Tech Semester 4, academic session 2021-22. Published by Dr. A.P.J. Abdul Kalam Technical University (AKTU/UPTU), Lucknow. Free PDF download — no login required.

Course:B.Tech
Semester:Semester 4
Session:2021-22
University:AKTU / UPTU

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Questions Asked in 2021-22

Applied Thermodynamics (KME401) — complete question paper

Section AAttempt all q u e s t i o n s i n b r i e f . 2*10 = 20
  • a
    Define adiabatic flame temperature. 1
  • b
    Define Stoichiometric air and Excess air. 1
  • c
    Define Enthalpy of formation. 2
  • d
    Discuss limitations of Carnot vapour power cycle and explai n how Rankine cycle helps in overcoming them
  • e
    Differentiate between Boile r mountings and Boiler accessories. 3
  • f
    Differentiate between Jet condensers and Surface condensers . 3
  • g
    Define Degree of reaction of steam turbine. 4
  • h
    Differentiate between Impulse and Reaction Turbines. 4 (i) Explain Rocket Propulsion. 5 (j) Classify the jet p ropulsion engines. 5
Section BAttempt any three o f t h e f o l l o w i n g : 10*3 = 30
  • a
    Derive an expression for air standard efficiency of Otto cycle in terms of compression ratio
  • b
    A steam turbine plant operates on Rankine cycle with steam entering turbine at 40 bar, 350ºC and leaving at 0.05 bar. Steam leaving turbine condenses to saturated liquid inside condenser. Feed pump pumps saturated liquid into boiler. Determine the net work per kg of steam and the cycle efficiency. Assuming all processes to be ideal. Also show cycle on T-s diagram
  • c
    Draw any water tube boiler and explain the functioning of f ollowing mounting and accessories- safety valves, and Fusible plug, Feed check valve, Superheater, Economizer and Air-preheater
  • d
    Define the blade efficienc y. Derive an expression for maximum blade efficiency for an impulse turbine. (ηblade)max= Cos2 α
  • e
    Derive the expression for vol umetric efficiency of reciproc ating compressor in terms of pressure ratio and clearance ratio. A 2- stage compressor with perfect intercooling delivers 5 Kg/min air at 1 6 bar. Inlet conditions are 1 bar and 300 K. The index of compression is 1.3. Determine the power required to run compressor and isothermal efficiency of compressor
Section CAttempt any one p a r t o f t h e f o l l o w i n g : 10*1 = 10
  • a
    The percentage composition of a fuel on mass basis is as fo llows: C=90% , H2 = 3.5%, O2 =1% , S=0.5% and ash=5% Calculate the i) minimum air required for complete combustion of 1kg of fuel ii) composition of dry flue gases on mass basis if 50 % excess air is supplied. ( b ) D i s c u s s a n y 4 d i f f e r e n c e s b e t w e e n O t t o c y c l e a n d D i e s e l c y cle. Determine thermal efficiency and mean effective pressure of thermodynamic cycle used by a 4-stroke petrol engine. Details of cycle are as follows. Compression ratio = 7, Initial state=100 KPa and 90ºC Swept volume = 0.1 m 3 Heat added to cycle at constant volume = 100 KJ/cycle
  • a
    Discuss the effects of Reg eneration, Superheating, Reheating on Rankine cycle with the help of neat sketches
  • b
    In a combined gas turbine steam turbine power plant , the e xhaust gas from the open cycle gas turbine is supply gas to steam generato r of steam cycle at which additional fuel is burnt in the gas. The p ressure ratio for the gas turbine is 7, air inlet temperature is 20oC and maximum cycle temperature is 750oC.Combustion of additional fuel raise the gas temperature to 750oC and gas leaves the steam generator at 100oC.The steam is supplied to the turbine at 50 bar, 600oC and condenser pressure is 0.1 bar. The total power output of plant is 200 MW. The calo rific value of fuel burnt is 43.3 MJ/Kg. Determine the following- Pow er output of gas turbine and steam t urbine, Thermal efficiency of combined plant. For combustion gases- C P = 1.11 KJ/Kg, 𝛾= 1.33 . For air- CP = 1.005 KJ/Kg, 𝛾 = 1.4
  • a
    Demonstrate the followi ng - Equivalent evaporation, Effects of air leakage on condenser performance, Boiler Draught , Difference between Natural and Forced Draught
  • b
    The following readings were taken during a test on surface condenser Mean condenser temperature = 35 oC, Hot well temperature = 30 oC, Condenser vaccum = 69 cm Hg, Barometer reading = 76 cm Hg, Condensate collected = 16 Kg/ min, Cooling water enters at 20 oC and leaves at 32.5oC , Flow rate = 37500Kg/h Calculate the following- Mass of air present per cubic metre of condenser, Quality of st eam at condenser inlet, Vaccum Efficiency, Condenser efficiency
  • a
    Define critical pressure ra tio for nozzle of the steam turb ine. Obtain analytically its value in terms of the index of expansion
  • b
    A stage of a steam turbine with Parsons’ blade delivers a d ry saturated steam at 2.7 bar from fixed blade at 90m/sec. The blade height is 40 mm and moving blade exit angle is 20 o. The flow components of velocity is ¾ blade velocity at inlet condition. Steam is supplied at rate of 9000 Kg/hour. The blade effect of blade thickness can be neglected .The specific volume of steam at 2.7 bar is 0.6686 m 3/Kg. Determine the following- Rotational speed in rpm, power developed, blade efficiency
  • a
    A turbojet flying at 800 Km/h has an air flow rate of 50 Kg /s. The enthalpy drop across the nozzle is 200 KJ/Kg. The air-fuel rati o is 80 and calorific value of fuel is 4 1 MJ/kg. Estimate propulsive po wer, Thrust power, propulsive efficiency, thermal efficiency and ove rall efficiency of the unit
  • b
    Explain perfect intercooling in brayton cycle. A Brayton cy cle has a pressure ratio of 4. Inlet conditions are 1 bar, 27 oC. Find air flow required for 100 KW power output if maximum temperature in the cycle is 1000oC. Take 𝛾 =1.4 and Cp= 1 KJ/Kg.K

Question text is extracted from the official AKTU question paper PDF above. Hindi translations are omitted — every question is printed in English in the original paper. Last verified: 2026-08-23.

Repeated Questions — KME401

Questions that appeared in more than one session, found by comparing 2 years of Applied Thermodynamics papers (2021-22, 2022-23)

2x

Differentiate between Boile r mountings and Boiler accessories. 3

Appeared in: 2021-22 · 2022-23

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