Energy Engineering important questionsMost repeated in SPPU papers
These 29 questions appeared in more than one SPPU Energy Engineering paper we have: 9 papers, from Feb 2023 to Nov 2025. The most-asked come first. Each one links to the papers it was asked in.
Repeated questions
Endsem questions (29)
- 6×asked
- 5×asked
The air enters the compressor of a gas-turbine power plant at 1 bar, 30 degrees Celsius and 162 tons per hour. The maximum cycle temperature, pressure is 650 degrees Celsius, 5 bar respectively. The two stage expansion with reheating pressure of 2.24 bar is used in the plant. In the reheater gas is heated up to maximum cycle temperature. The isentropic efficiency of compressor, first turbine, and second turbine is 80%, 85%, 90% respectively. Take adiabatic index for air gas as 1.4, 1.33 respectively. Take specific heat for air, gas as 1 KJ/Kg-K, 1.15 KJ/Kg-K respectively. Neglect mass flow rate of fuel. Draw cycle arrangement and T-s diagram and determine: i) The thermal efficiency of cycle ii) Power output of plant in MW
- 4×asked
- 4×asked
- 4×asked
- 4×asked
- 4×asked
- 3×asked
- 3×asked
- 3×asked
The air enters the compressor of gas-turbine power plant at 1 bar, 27º C. The pressure ratio is 6:1. The air after compression is passed through heat exchanger with effectiveness 0.65. Then air is passed to combustion chamber and heated to 870°C. Then gases are expanded up to 1 bar in turbine then to heat exchanger and finally to the exhaust. The isentropic efficiency of compressor, gas turbine is 80%,85% respectively. Take adiabatic index for air gas as 1.4. Take specific heat for air, gas as 1 KJ/Kg-K. Neglect mass flow rate of fuel and air mass as 5kg/sec. Draw cycle arrangement and T-s diagram and determine. i) The thermal efficiency of cycle ii) Heat carried away by exhaust gases on per minute basis
- 3×asked
A power generation station with maximum demand as 30 MW having following annual data. Capacity factor = 0.4, Load factor = 0.5 and use factor = 05. Determine- i) Annual energy produced ii) Reserve capacity over and above peak load iii) Number of hours during which plant is not working.
- 3×asked
- 2×asked
- 2×asked
- 2×asked
Draw the hydrograph and flow duration curve for the following data: Month Inflow(m 3 /s) Month Inflow(m 3 /s) Jan. 1600 July 3000 Feb. 1200 Aug. 3000 March 800 Sept. 1600 April 800 Oct. 800 May 800 Nov. 800 June 1200 Dec. 1000 Determine: i) Storage capacity for a constant demand of 1100 m 3 /s ii) Number of additional months this storage capacity can be utilized if there is no rain fall.
- 2×asked
- 2×asked
- 2×asked
- 2×asked
A steam power station has an installed capacity of 120 MW and maximum demand of 100 MW. The coal consumption is 0.4 kg per kWh and cost of coal is Rs. 80 per ton. The annual expenses on salary bill of staff and other overhead charges excluding cost of coal are Rs.50×10 5 . The power station works at a load factor of 0.5 and the capital cost of the power station is Rs. 4×10 5 . If the rate of interest and depreciation is 10%. Determine total annual energy generation and the cost of generating per kWh.
- 2×asked
Air enters the compressor of a gas-turbine power plant having capacity 10 MW at 1 bar and 27 degrees Celsius. The maximum cycle temperature, pressure is 577º C, 6.5 bar respectively. The two stage compression with perfect inter cooling arrangement is incorporated in the plant. The compression in both stages and expansion in turbine are isentropic. Take adiabatic index, specific heat for both air and gas as 1.4, 1 KJ/Kg-K respectively. Assume calorific value of fuel as 45 MJ/Kg. Draw cycle arrangement and T-s diagram and determine i) The thermal efficiency of cycle with considering effect mass flow rate of fuel on air. ii) Fuel consumption on per hour basis (with inter cooling arrangement)
- 2×asked
- 2×asked
- 2×asked
- 2×asked
- 2×asked
- 2×asked
- 2×asked
- 2×asked
- 2×asked
Questions count as repeated when their wording matches closely across papers. Numericals that depend on a figure are left out, since the figure changes from paper to paper.