Q.1
14 Marks(a)
Define these terms: (1) Absolute Pressure (2) Thermal Equilibrium
3Prime Mover
(b)
Explain with suitable examples the following thermodynamic systems:
1Isolated (2) Open
(c)
Write a short note on “Renewable Energy Sources”.
Gujarat Technological UniversitySummer 2024 examination
GTU 3110006 Basic Mechanical Engineering (BME) Summer 2024 Question Paper & PDF
B.E. · Common Engineering · Semesters 1 and 2 · Subject code 3110006
- Total
- 70 marks
- To pass
- 23 marks (33%)
- Duration
- 2.5 Hours 2:30 PM – 5:00 PM
- Questions
- 5 with internal choice
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Q.2
14 Marks(a)
Define: (1) Isothermal process (2) Adiabatic process (3) Degree of superheat.
(b)
Determine the condition of steam at a pressure of 10 bar and temperature of 200 ℃.
(c)
A gas initially at 510 kPa and volume of 142 liters undergoes a certain process after which the pressure and volume reach to 170 kPa and 275 liters respectively. And there is enthalpy drop of 65 kJ. The specific heat at constant volume for this gas is 718 J/kg-K. Calculate:1. Change in internal energy 2. Specific heat at constant pressure 3. Gas Constant.
OR
(c)
1Draw neat diagram of the Separating Calorimeter.
2Determine the dryness fraction of steam after throttling from pressure 14 bar to 1.1 bar. The initial dryness fraction of steam is equal to 0.70
Q.3
14 Marks(a)
Define the terms: (1) T.D.C. (2) B.D.C. (3) Compression Ratio
(b)
Classify the I. C. Engines.
(c)
Calculate the air standard efficiency of the diesel cycle where the pressure and temperature at the beginning of compression process are 1 bar and 27 ℃ respectively. The compression ratio is 14 and the constant pressure heat addition continues up to 7% of the stroke volume. Draw this Diesel cycle on p-v diagram.
OR
(a)
Write the function of following I.C. Engine components:
1Spark Plug (2) Injector (3) Piston Rings
(b)
Calculate the air standard efficiency of an Otto Cycle engine having a bore of 100 mm and stroke length equal to 150 mm. The clearance volume of cylinder is equal to 250 cm³. Take ᵞ = 1.4.
(c)
A Diesel engine develops 5 kW brake power at a speed of 1000 rpm. The mechanical efficiency of the engine is 75% and indicated thermal efficiency is equal to 30 %. The diesel fuel having specific gravity = 0.87 and calorific value = 42700 kJ/kg is used. Calculate: 1. Fuel consumption in kg/h. 2. Brake thermal efficiency 3. Brake specific fuel consumption.
Q.4
14 Marks(a)
Define these terms: (1) Refrigerant (2) C.O.P. (3) Air conditioning.
(b)
Classify the Boilers.
(c)
Explain with neat diagrams the working of centrifugal compressor and centrifugal pump.
OR
(a)
What is an economizer? Why is it used in boiler plant?
(b)
Classify the Pumps.
(c)
Explain the characteristics of a Lancashire boiler with neat diagrams.
Q.5
14 Marks(a)
List the important properties of engineering materials.
(b)
Explain with neat diagram the working of domestic refrigerator.
(c)
Classify: (1) Clutches (2) Brakes
OR
(a)
Define these terms: (1) Coupling (2) Shaft (3) Spindle
(b)
Explain with neat diagram the construction and working of Roots Blower.
(c)
Compare: Belt, Chain and Gear drives.
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About this paper
Official Gujarat Technological University (GTU) examination paper for Basic Mechanical Engineering (BME) (Summer 2024, 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.