Applied Thermodynamics (BME401) - AKTU Question Paper 2023-24
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 2023-24. Published by Dr. A.P.J. Abdul Kalam Technical University (AKTU/UPTU), Lucknow. Free PDF download — no login required.
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Questions Asked in 2023-24
Applied Thermodynamics (BME401) — complete question paper · 70 marks · 3 Hours
- aDifferentiate between S.I. engine and C.I. engine
- bWhat are the limitations of Carnot vapour power cycle?
- cWhat do you mean by endothermic and exothermic reactions?
- dWhat is the function of an air pre-heater in a boiler system ?
- eDifferentiate between surface condenser and jet condenser
- fWhat factors influence the efficiency of a nozzle?
- gWhat is stage efficiency?
- aDerive expression for e fficiency of Otto cycle
- bCompare performance of regenerative cycle with simple Rankin e cycle
- cWhat are the different types of condensers used in power pla nts, and what are their key features?
- dObtain the condition for maxim um blade efficiency in single stage impulse turbine. Also, show how this efficiency varies with blade speed to steam velocity ratio
- eWhat is the purpose of reheat in a gas turbine cycle, and ho w does it affect thermal efficiency?
- aA four-stroke SI engine has the compression ratio of 6 and s wept volume of 0.15 m3. Pressure and temperature at the beginning of compression are 98 kPa and 60ºC. Determine the pressure, volume and temperatures at all salient points if heat supplied to it is 150 kJ/kg. Also find out entropy change, work done, efficiency and mean effective pressure of cycle assuming cp = 1 kJ/kg ꞏ K, cv = 0.71 kJ/kg ꞏ K. Also, plot the cycle on T-S diagram
- bWhat is the principle of operation of a turbocharger, and ho w does it improve engine performance?
- aA steam turbine plant operates on Rankine cycle with steam e ntering turbine at 40 bars, 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 network per kg of steam and the cycle efficiency assuming all processes ideal. Also show cycle on T-s diagram. Also, determine pump work per kg of steam considering linear variation of specific volume
- bDuring Orsat analysis of the combustion products of an engin e running on diesel (C12H26) the CO2 and O2 are found to be 7.2% and 10.8% respectively and rest is N2 by volume. Determine the air-fuel ratio and percentage excess air considering air to have O2 and N2 in proportion of 23.2% and 76.8% respectively by mass
- aA boiler may have waste gases leaving the installation when artificial draught is used at 150°C. The natural draught chimney is of 60 m height. The hot g ases within chimney are at temperature of 300°C and air requirement is 19 kg per kg of fue l burnt. The atmospheric air is at 17°C temperature and mean specific heat of hot gases is 1 .0032 kJ/kg. K. The calorific value of fuel burnt is 32604 kJ/kg. Determine the following: (i) the draught produced in mm of water (ii) the efficiency of chimney (iii) the extra heat carried away by flue gases per kg of fuel
- bA steam condenser has steam entering at 35°C and condensate being removed at 34°C. Condenser has two pumps one for extracting air and other for extraction of condensate. Air is removed at temperature of 33°C. The air leaks into condenser at the rate of 3 kg/hr. Consider the pressure inside condenser to remain uniform and neglect cha nge in pressure due to air at steam inlet. Determine the volume of air handled by air pump in kg/hr and determine the volume to be handled if a combined air and condensate pump is being used
- aIn a single stage impulse turbine, the isentropic enthalpy d rop of 200 kJ/kg occurs in the nozzle having efficiency of 96% and nozzle angle of 15°. The bl ade velocity coefficient is 0.96 and ratio of blade speed to steam velocity is 0.5. The steam mass flow rate is 20 kg/s and velocity of steam entering is 50 m/s. Determine
- athe blade angles at inlet and outlet if the steam enters blades smoothly and leaves axially
- bthe blade efficiency
- cthe power developed in kW
- bDetermine the mass flow rate of steam through a nozzle havin g isentropic flo w through it. Steam enters nozzle at 10 bar, 500°C and leaves at 6 bar. Cross-section area at exit of nozzle is 20 cm2. Velocity of steam entering nozzle may be considered negligible. Show the process on h-s diagram also
- aA gas turbine unit receives a ir at 1 bar, 300 K and compresses it adiabatically to 6.2 bar. The compressor efficiency is 88%. The fuel has a heating value of 4 4186 kJ/kg and the fuel-air ratio is 0.017 kg fuel/kg of air. The turbine internal efficiency is 90%. Calculate the work of turbine and compressor per kg of air compressed and thermal eff iciency. For products of combustion cp = 1.147 kJ/kg K, γ = 1.33
- bWhat are the advantages and disadvantages of turbojet engine s compared to other jet propulsion systems?
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 — BME401
Questions that appeared in more than one session, found by comparing 3 years of Applied Thermodynamics papers (2023-24, 2024-25, 2025-26)
What is the function of an air pre-heater in a boiler system ?
Appeared in: 2023-24 · 2025-26
In a single stage impulse turbine, the isentropic enthalpy d rop of 200 kJ/kg occurs in the nozzle having efficiency of 96% and nozzle angle of 15°. The bl ade velocity coefficient is 0.96 and ratio of blade speed to steam velocity is 0.5. The steam mass flow rate is 20 kg/s and velocity of steam entering is 50 m/s. Determine
Appeared in: 2023-24 · 2024-25
the blade angles at inlet and outlet if the steam enters blades smoothly and leaves axially
Appeared in: 2023-24 · 2024-25
the blade efficiency
Appeared in: 2023-24 · 2024-25
the power developed in kW
Appeared in: 2023-24 · 2024-25
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