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What is the difference between elasticity and plasticity? What do you understand by resilience?
Air enters a compressor at 1.013 bar and 27°C having a volume of 5 m³/kg and it is compressed to 12 bar isothermally. Determine:
Five kg of air is heated from an initial volume of 0.5 m³ to final volume of 1.3 m³ at constant pressure 4 bar. Determine:
Show the vapour compression refrigeration cycle on T-s and p-h diagram. Name each process in the cycle.
Steam at 5 bar and dryness fraction of 0.85 expands reversibly at constant pressure until the temperature is 220°C. Determine the work and heat transfer per kg of steam during the process. Take specific heat for superheated steam as 2.1 kJ/kg K.
A classroom has a window air conditioner of 2 TR capacity. Its COP is 3. How much electrical energy (in kWhr) will be consumed in one month if the unit runs for 6 hours per day?
During a test of steam with throttling calorimeter, sample is taken from main pipe at 15 bar, pressure and temperature after throttling are 1.2 bar and 150°C respectively. Determine dryness fraction of steam. Take specific heat of superheated steam as 2.1 kJ/kg K.
A steam plant works on ideal Rankine cycle. Steam is supplied at 25 bar and 290°C. The steam exhausts into a condenser at 15 kN/m² with 0.9 dry. Determine the cycle efficiency.
Give similarities and differences between a friction clutch and a positive-contact clutch.
An oil engine working on diesel cycle has cylinder bore of 190 mm and piston stroke of 230 mm. The clearance volume is 290 cm³. The fuel injection takes place at a constant pressure for 6% of the stroke. Determine the air-standard efficiency.
What do you understand by positive displacement compressor? How it differs from rotodynamic compressor?
Define with regard to compressors: double-acting compressor, multistage compressor, displacement (swept) volume, pressure ratio.
A 6-cylinder 4-stroke I.C. engine is used to produce 95 kW brake power at 800 rpm. The stroke to bore ratio is 1.25. Mean effective pressure is 7 bar. Determine the bore and stroke of the engine. Assume mechanical efficiency as 80%.
Questions repeat across sessions. Working through two or three papers shows you which topics GTU asks most.
BE Common
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Official Gujarat Technological University (GTU) examination paper for Basic Mechanical Engineering (Winter 2025, B.E. · Common Engineering, Sem 1). Features complete 70-mark regular & remedial examination pattern, official marking distribution across all 5 questions, and direct 1-click official PDF download.
Transcribed for student exam preparation from Gujarat Technological University official examination archives. Questions, syllabus guidelines, and curriculum marking schemes remain the intellectual property of Gujarat Technological University.
BE01000081 Basic Mechanical Engineering
Official GTU PDF · Winter 2025
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