BME semester examination winter 2019 (vgec)
BE 1st-semester examination winter 2019 subject code 311006 Date:18/11/2019 subject name: Basic Mechanical Engineering Time: 1 hour Total marks: 15 Q.1(A) State all three laws of thermodynamics. Explain Zeroth law of thermodynamics in detail.[3] Q.2(A) Calculate the mass of 0.2 m 3 of steam at 10 bar pressure having dryness fraction of 0.7. Also calculate enthalpy, internal energy of 2 m 3 of steam.[5] OR Q.2(A)In an air compressor, air enters at 1.013 bar and 27C having a volume of 5 m 3 and it is compressed to 12 bar isothermally. Determine (i) work done (ii) heat transfer, and (iii) change in internal energy.[5] Q.3(A)Explain with neat sketch the construction working of Babcock and Wilcox boiler.[4] (B) Compare: S.I.engine and C.I. engines.[3] OR Q.3(A) Show the function and location of the following in the boiler plant:(i) Steam stop valve (ii)Water level indicator (iii) Fusible plug (iv) Economizer.[4] (B) Define the following terms: swept volume, clearance v...