Name of the College : P.E.S College of Engineering
University : Visvesvaraya Technological University
Department : Mechanical Engineering
Subject Code/Name : P08ME43/MECHANICAL MEASUREMENTS AND METROLOGY
Degree : B.E
Sem : IV
Website : pescemandya.org
Document Type : Model Question Paper
Download Model/Sample Question Paper : https://www.pdfquestion.in/uploads/pescemandya.org/4692-mech_question_paper.pdf
Mechanical Measurements & Metrology Question Paper :
Fourth semester B. E Degree Examination
Time: 3 hrs
Max. Marks: 100
Related : P.E.S College of Engineering P08ME35 Basic Thermodynamics B.E Model Question Paper : www.pdfquestion.in/4691.html
Note: Answer any FIVE full questions, selecting at least TWO questions from each Part – A and Part – B.
Part – A :
1. a Define Metrology and state its objectives. (06 Marks)
b Define line and end standards, Give the sub division of standard. (08 Marks) c Give details of M112 set, and build the following dimensions; 49.3115 68.208 (06 Marks)
2. a With a sketch brief the ‘Hole basis’ and ‘shaft basis’ system of fits. (06 Marks)
b Differentiate between interchangeability and selective assembly. (08 Marks)
c State and explain Taylor’s principle of gauge design. (08 Marks)
3. a What is comparator? Explain any one type of mechanical comparator (10 Marks)
b Explain with sketch, how sine bar can be used to measure a taper angle. (10 Marks)
4. a Write a note on interferometry. (04 Marks)
b Define ‘effective diameter’ and ‘best size wire’, Derive an expression to determine the best size wire diameter (08 Marks)
c Explain with sketch the principle and working of an auto collimator (08 Marks)
Part – B :
5. a Explain the terms with sketches: i) Linearity ii) Hysteresis. (10 Marks)
b Classify errors, what are the sources of errors in measurement. (10 Marks)
6. a With the help of neat sketch, explain the working of cathode ray oscilloscope. (10 Marks)
b Write a note on: i) Input circuitry ii) Ballast circuit. (10 Marks)
7. a With a neat sketch explain the working of Hydraulic dynamometer. (10 Marks)
b Explain with a neat sketch explain the Bridgman gauge for pressure measurement. (10 Marks)
8. a State and explain the laws of thermocouple. (04 Marks)
b With a neat sketch, explain the principle and working of optical pyrometer. (08 Marks)
c Explain the principle and working of unbonded and bonded electrical strai gauges. (08 Marks)
Mechanics of Materials Model Question Paper :
Part-A :
1 a. Define i) Poisson’s Ratio ii) Bulk modulus iii) Factor of safety. (03)
b. Derive an expression for deformation of a tapering rectangular bar of widths ‘b’1 and ‘b’2 and thickness‘t’ when it is subject to an axial force ‘P’. (07)
c. For the component shown in fig. 1(c), determine the magnitude of force P, such that net deformation in the bar does not exceed 1 mm. E for steel is 200 GPa and that for Aluminum is 70 GPa. Big end diameter and small end diameter of the tapering bar are 40mm and 12.5mm respectively. (10)
2 a. Derive an expression for relationship between Young’s modulus, modulus of Rigidity and Poisson’s ratio. (10)
b. Two bars of the same length, one of steel, the other of brass, have their ends firmly united. The areas of cross-sections of the steel and brass bars are respectively 850 mm2 and 1000 mm2. Find the stresses in steel and brass when the temperature falls by 100°C. Take Es = 200GPa, Eb = 80GPa, as = 0.000012/0C and ab = 0.000021/0C. (10)
3 a. Define Principal Stresses and Principal Planes. (03)
b. Prove that the sum of normal stresses on any two mutually perpendicular planes is a constant in a general two dimensional stress system. (07)
c A plane element is subjected to stresses as shown in fig.3(c). Determine principal stresses maximum shear stress and their planes. Sketch the planes determined. (10)
4 a. Derive an expression for circumferential and longitudinal stress for thin cylinder. (10)
b. A pipe of 400mm internal diameter and 100 thickness contains a fluid at a pressure of 80N/mm2. Find the maximum and minimum hoop stresses across the section. Also sketch radial and hoop stress distribution across the section. (10)