Friday, December 26, 2008

Dec. 2008 Question Paper with Model Answers

BE (First/Second) Semester Exam
(Common to all Branches)
Time: 3 hrs
Maximum Marks: 100
Minimum Marks: 35
Note:
Attempt FIVE questions, selecting ONE questions from each unit. Suitably assume any missing data. All questions carry equal marks.
Unit-I
1. a) Write classification and properties of cast iron. 10 marks
Ans: Refer Page 2 of BME - Basant Agrawal, Wiley India
1. b) Explain the properties and uses of stainless steel. 10 marks
Ans: Refer Page 6 of BME - Basant Agrawal, Wiley India
Or
2. (a) Draw and explain stress-strain curve for an elastic material. 10 marks
Ans: Refer Page 17 of BME - Basant Agrawal, Wiley India
2. (b) Define fatigue, hardness, toughness and stiffness. 10 marks
Ans: Refer Page 12-13 of BME - Basant Agrawal, Wiley India:
Unit-II

3.(a) Describe Vernier calliper with neat sketch. How small/linear measurements are done with it? 10 marks
Ans: Refer Page 79-81 of BME - Basant Agrawal, Wiley India
3.(b) Describe various methods of temperature measurement. 10 marks
Ans: Refer Page 39-45 of BME - Basant Agrawal, Wiley India
Or
4. (a) Explain Drilling machine with the help of a neat sketch. 10 marks
Ans: Refer Page 98 (only) of BME - Basant Agrawal, Wiley India
4. (b) Explain Sine Bar. 10 marks
Ans: Refer Page 87 of BME - Basant Agrawal, Wiley India
Unit-III
5. (a) Define the following properties of fluids: (i) Density (ii) Specific volume (iii) Specific gravity (iv) Viscosity (v) Kinematic viscosity. 10 marks
Ans: Refer Page 112, 113, 115 of BME - Basant Agrawal, Wiley India
5. (b) State and explain Bernoulli's equation for incompressible fluids. 10 marks
Ans: Refer Page 124-125 of BME - Basant Agrawal, Wiley India
Or
6. (a) The water is flowing through a pipe having diameters 25 cm and 1o cm at section 1 and 2 respectively. The rate of flow of water through the pipe is 30 litres/sec. Section 1 is 10 m above the ground and section 2 is 2 m above the ground. If pressure at section 1 is 40 N/cm2, find the pressure at section 2. 10 marks
Ans: Refer Page 129 of BME - Basant Agrawal, Wiley India
6. (b) Explain fluid coupling. 10 marks
Ans: Refer Page 139-140 of BME - Basant Agrawal, Wiley India
Unit-IV
7. (a) State and explain First law of thermodynamics. 10 marks
Ans: Refer Page 164-165 of BME - Basant Agrawal, Wiley India
7. (b) How boilers are classified? Explain giving examples. 10 marks
Ans: Refer Page 216-217 of BME - Basant Agrawal, Wiley India
Or
8. a) Explain the construction and working of a Chchran boiler with the help of a neat sketch. 15 marks
Ans: Refer Page 219-221 of BME - Basant Agrawal, Wiley India
8. b) List Boilers mountigs and accessories. 5 marks
Ans: Refer Page 226 of BME - Basant Agrawal, Wiley India
Unit -V
9. (a) Explain the working of a four stroke petrol engine. 15 marks
Ans: Refer Page 329-330 of BME - Basant Agrawal, Wiley India
9. (b) Explain Carnot cycle. 5 marks
Ans: Refer Page 300-301 of BME - Basant Agrawal, Wiley India
Or
10. (a) Write down the principal parts of an I.C. Engine with their functions. 10 marks
Ans: Refer Page 328-329 of BME - Basant Agrawal, Wiley India
10. (b) Differentiate between two-stroke and four-stroke cycle. 10 marks
Ans: Refer Page 334 of BME - Basant Agrawal, Wiley India