18ME15/25
Model Question Paper
First Semester B.E. Degree (CBCS) Examination
Elements of Mechanical Engineering
Time: 3 hrs. Max. Marks: 100
Note: 1.Answer any FIVE full questions, choosing one full question from each module.
2. Use of Thermodynamic data hand book permitted.
MODULE I
1 a Enumerate the method of extracting energy from wind with a neat sketch (08Marks)
b Illustrate the formation of steam with relevant sketches. (08Marks)
c What are the different states of steam? Explain them in brief. (04 Marks)
OR
2 a Explain Zeroth law of thermodynamics. List the similarities and dissimilarities
between work and heat.
(10 Marks)
b A stationary mass of gas is compressed without friction from an initial stage of
0.3 m3and 0.105 MPa to a final state of 0.15 m3, the pressure remaining constant.
There is a transfer of 37.6 kJ of heat from the gas during the process. How much
does the internal energy of the gas change?
(10Marks)
MODULE II
3 a With a neat sketch, explain the working of Lancashire boiler. (10 Marks)
b Explain the different boiler mountings and accessories. (10 Marks)
OR
4 a Classify Hydraulic turbines and with a neat sketch explain the working of a
typical impulse turbine. (10 Marks)
b Describe the working of a reciprocating pump. (10 Marks)
MODULE III
5 a With the help of P-V diagram, explain the operation of 4-Stroke Diesel engine (10 Marks)
b The following observations were recorded during a test on single cylinder diesel
engine: Brake Power= 75 kW, Brake thermal efficiency= Mechanical
efficiency= calorific value =40000 kJ/kg. Determinei) IP ii) FP iii) fuel
consumed per hour.
(10 Marks)
OR
6 a Explain the ideal properties of refrigerant. (06 Marks)
b With the help of a sketch, explain the functioning of Vapor AbsorptionSystem. (10 Marks)
c List the most commonly used refrigerants. (04 Marks)
MODULE IV
7 a Classify and explain various types of smart materials (10 Marks)
b With a neat sketch explain TIG welding. (10 Marks)
OR
8 a Derive an expression for length of belt in cross belt drive. (10 Marks)
b What are the advantages and disadvantages of gear drives over belt drives? (10Marks)
USN
Important Note: 1. On completing your answers, compulsorily draw diagonal cross lines on the remaining blank pages.
2. Any revealing of identification, appeal to evaluator and /or equations written e.g, 38+2 40, will be treated as malpractice.
18ME15/25
18ME15/25
MODULE V
9 a What are the various methods of producing taper turning method? Explain taper
turning by swiveling the compound method. (10Marks)
b Explain the following machining operations on milling machine with suitable
sketches
Plane milling End milling Slot milling Form milling
(10 Marks)
OR
10 a Explain the components of a CNC with a block diagram (10Marks)
b Elaborate the various robot configurations with simple sketches (10 Marks)