Fourth Year EngineeringMechanical EngineeringSemester 83 credits

Renewable Energy Technologies (RET)SPPU question papers (PYQ), solutions and notes

Renewable Energy Technologies for Final Year (BE) Mechanical Engineering

resources for this subject

Subject code MECHANICAL_BE_8702

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Renewable Energy Technologies (RET) is a semester 8 subject in Fourth Year Engineering, Mechanical Engineering, at Savitribai Phule Pune University (SPPU).

Here you’ll find 8 previous question papers (2023–2025) and 1 video lecture.

Every question of 8 papers (Feb 2023 to Nov 2025) is written out on the paper pages below, so you don’t need to open a PDF.

Insem papers are 30 marks (1 hour) and endsem papers are 70 marks (2½ hours). These are 2019-pattern papers.

Papers for every BE Mechanical Engineering Sem 8 subject

RET previous year question papers

Pick a paper to read all its questions. No sign-in needed.

EndsemNov 2025 May 2025 Nov 2024 May 2024 Nov 2023 May 2023

InsemMar 2024 Feb 2023

Most repeated RET questions

Asked in more than one SPPU paper, out of 8 we have.

4×asked
A propeller type wind turbine has the following data: Speed of the free wind at a height of 10 m = 12 m/s Air density = 1.226,  = 0.14 , Height of tower = 100 m, Diameter of rotor = 80 m, Wind velocity at the turbine reduces by 20 %, Generator efficiency = 85% Determine. i) Total Power available in wind Power extracted by the turbine. ii) Electrical power generated Axial thrust on the turbine. iii) Maximum axial thrust on the turbine.
Nov 2025 ·Nov 2024 ·May 2023 ·Feb 2023
4×asked
What are the design considerations of Horizontal and Vertical axis wind turbines?
Nov 2025 ·May 2025 ·May 2024 ·May 2023
3×asked
A biomass gasifier is used to run a compression ignition engine. The engine operates in the dual fuel mode with 75 % diesel replacement. The biomass feeding rate for the gasifier is 170 kg/hr. Calculate the power produced by the engine, if the engine efficiency is 28 % and calorific value of biomass is 15500 k.J/kg. Consider efficiency of the gasifier is 0.70. 
May 2025 ·Nov 2023 ·May 2023
3×asked
Design a standalone PV system for the load specified in the table. Load Number Power Rating (Watt) Usage Hr/day T.V 1 100 2 Refrigerator 2 50 8 Computer 3 18 5 Find: i) Energy supplied (Wh) by the battery to inverter input considering inverter efficiency = 85 %. ii) Considering Depth of Discharge (DOD) of 50 %, calculate the required charge capacity of battery (24V). iii) Considering two days of autonomy, calculate battery charge capacity. iv) Calculate no. of batteries needed for 24 V system voltage if the available battery configuration is 12 V and 100 Ah. v) Calculate the number of panels of 60 W p for the above case considering 6 sunshine hours of 1000 W/m 2 -day. Assume battery efficiency = 80 %, Assume controller circuit efficiency = 100%. 2
May 2025 ·May 2024 ·May 2023
3×asked
List out and explain the components of wind turbine with neat sketch.
May 2025 ·Nov 2024 ·May 2023