Types of Engineering Materials - Engineering Science - Old Exam Paper, Exams of Engineering Science and Technology

Download Types of Engineering Materials - Engineering Science - Old Exam Paper and more Exams Engineering Science and Technology in PDF only on Docsity! Cork Institute of Technology Higher Certificate in Engineering in Civil Engineering – Stage1 (National Certificate in Engineering in Civil Engineering – Stage 1) (NFQ – Level 6) Autumn 2005 Engineering Science (Time: 3 hours) Instructions Section A is compulsory and carries 25%. Attempt 5 questions from section B. Each question in section B carries 15%. Examiner: Ms. M. Quirke Mr. J. Murphy Mr. P. Anthony Useful Constants/ Formulae: 0 1 10log10)( I IdB =β Io = 1 x10-12 W/m2 uvf 111 += TmcQ ∆=∆ l TTkA t Q )( 12 −= ∆ ∆ Power = U A ∆T ivt HHHH ++= ρ ν E= Sabin’s formula: Transformer: Coulomb’s Law 2 21 r qkq F = ∑ = αS Vt 16.0 mfffc EVVEE )1( −+= s p s p N N V V = mfffc EVVEE )1( −+= 21 111 RRR += 21 RRR += VIP RIP = = 2 Cork Institute of Technology Section A Q1. COMPULSORY. Give brief answers to any 10 of the following 12 questions. (a) Identify two types of artificial light and compare their properties. (b) Name the four main types of engineering materials. Classify the following structural materials into these classes of engineering materials. (i) Glass; (ii) PVC; (c) Cement; (d) Steel; (e) Reinforced concrete. (c) Describe clearly what is meant by (i) temperature and (ii) heat. What are their units? (d) Sketch a rough stress/strain curve for a brittle ceramic, a ductile metal and a ductile polymer. (e) List five ways of preventing/minimising corrosion of metals. (f) Discussing sound insulation explain the terms (i) floating floor, (ii) mass law (g) State Coulomb’s Law. Give one example of static electricity. (h) Calculate how much energy is required to completely change one gram of ice at 0 oC to water at 10 oC. [The specific heat capacity of water is 4,200 J kg-1 oC-1. The specific latent heat of fusion of ice is 3.3x105 J kg-1]. (i) Define sound intensity and decibel. (j) A polymer bar’s dimensions are 25mm x 50 mm x 380 mm. The polymer has a modulus of elasticity of 4 GPa. What force is required to stretch the bar elastically to 387 mm? (k) An object 3 cm tall is placed 24 cm from a converging (convex) lens. A real image is formed 8 cm from the lens. Determine the focal length of the lens and the size of the image. (l) What is the reading on the micrometer shown here in figure 1? Figure 1. (10 x 5 marks or 10 x 2.5 %) Micrometer reading with main scale in mm