Question 1
(a)
State and explain zeroth law of thermodynamics.
3 Marks
(b)
List sources of renewable energy.
4 Marks
(c)
Define prime mover and classify it.
7 Marks
Gujarat Technological UniversityWinter 2024 Examination
GTU 3110006 Basic Mechanical Engineering (BME) Winter 2024 Paper Solution & PDF
B.E. · Common Engineering · Semester 1 · Subject Code: 3110006
Total Marks70 MarksExternal theory exam
Passing Marks23 Marks33% minimum cutoff
Exam Duration2.5 Hours10:30 AM – 1:00 PM
Paper Structure5 QuestionsWith internal OR choices
Question 2
(a)
Derive characteristic equation of a perfect gas.
3 Marks
(b)
Define following terms:
iDryness fraction
iiDegree of superheat
iiiEnthalpy of evaporation
ivEnthalpy of superheated steam
4 Marks
(c)
One kg of gas is compressed polytropically from 150 kPa pressure and 290 K temperature to 750 kPa. The compression is according to law pV1.3 = C. find :
iFinal temperature
iiWork-done
iiiChange in internal energy
ivAmount of heat transferred
vChange in enthalpy, Take R=0.287 kJ/kg K and cp= 1.001 kJ/kg K
7 Marks
OR OPTION
(c)
Determine dryness fraction of steam supplied to a separating and throttling calorimeter. Water separated in separating calorimeter = 0.45 kg Steam discharge from throttling calorimeter = 7 kg Steam pressure in main pipe = 1.2 MPa Barometer reading= 760 mm of Hg Manometer reading = 180 mm of Hg Temperature of steam after throttling = 140° C Take Cps=2.1kJ/kgK
7 Marks
Question 3
(a)
State limitations of Carnot gas power cycle.
3 Marks
(b)
Compare 2- stroke engine with 4- stroke engine.
4 Marks
(c)
Derive an expression of air standard efficiency of Otto cycle. Draw its P-V and T-S diagram.
7 Marks
OR OPTION
(a)
State assumptions considered for analysis of air standard cycle.
3 Marks
(b)
Derive an expression for thermal efficiency of rankine cycle.
4 Marks
(c)
The following data is available for 2-stroke diesel engine: 07 Bore = 10 cm, stroke = 15 cm, engine speed=1000 rpm, torque developed= 58 N-m, ηm= 80%, ηi,th= 40%, calorific value of fuel =44000 kJ/kg. Find: (i) Indicated power (ii) Mean effective pressure (iii) Brake specific fuel consumption.
7 Marks
Question 4
(a)
Define Compressor. State uses of compressed air.
3 Marks
(b)
Discuss briefly location and function of the followings;
iWater level indicator
iiPressure Gauge
4 Marks
(c)
Explain with neat sketch working of Cochran boiler.
7 Marks
OR OPTION
(a)
Define following with reference to air compressor;
iFree air delivery
iiSwept volume
iiiVolumetric efficiency
3 Marks
(b)
Differentiate between boiler mountings and accessories.
4 Marks
(c)
Explain with neat sketch construction and working of split air conditioner.
7 Marks
Question 5
(a)
State the application of following gears
iHelical gear, (ii) worm and worm gear (iii) rack and pinion
3 Marks
(b)
What is coupling? Classify it.
4 Marks
(c)
Explain with neat sketch working of centrifugal pump.
7 Marks
OR OPTION
(a)
Enlist types of belt drive.
3 Marks
(b)
Differentiate between clutch and brake.
4 Marks
(c)
Explain following properties of materials.
iElasticity, (ii) Plasticity, (iii) Ductility, (iv) Brittleness (v) Hardness (vi) Toughness, (vii) Fatigue
7 Marks
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About this Examination Paper & Attribution
Official Gujarat Technological University (GTU) examination paper and step-by-step solutions for Basic Mechanical Engineering (BME) (Winter 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.