Mechanical Engineering

  Heat Transfer Important Questions   Unit -I Short answer questions: Q.1 Identify the different modes of heat transfer in the following systems/ operations. (a) Steam raising in a steam boiler. (b) Air / water cooling of an I.C. engine cylinder. (c) Heat loss from a thermos flask. (d) Heating of water in a bucket with an immersion heater. (e) Heat transfer from a room heater. (f) Heat transfer in a refrigerator cabin. Q.2 (a) With relevant examples, explain the mechanisms of conduction, convection and radiation heat transfer. Q.3. Explain clearly the basic laws of Heat transfer.      Long answer questions: Q.1 State and explain Fourier's law of conduction. What is the significance of negative sign in the equation? A temperature difference of 8450C is impressed across a fiberglass layer of 13cm thickness. The thermal conductivity of the fiberglass is 0.035 W/m K.Computethe heat transferred through the material per hour pe...

           Dr K V SUBBA REDDY INSTITUTEOF TECHNOLOGY (Approved by AICTE, New Delhi & Affiliated to JNTUA, Ananthapuramu) ISO9001:2008 Certified Institution College Code FH      LESSON PLAN Subject: Engineering Drawing                                                             Class: I B.Tech-I Sem Name of the Staff: K. Naga Gowri                                        ...