Visvesvaraya Technological University (VTU) 2007 B.E Electrical and Electronics Engineering Model EME1 - Question Paper

ELEMENTS OF MECHANICAL ENGINEERING
Model ques. paper No.1
I / II Semester B.E. Degree exam (Common to all Branches)
Prepared at the VTU Workshop on CAED, EME & Workshop Laboratory
held on 14th September 2006 at the Department of Mechanical Engineering, M.C.E, Hassan
Sub Code : 06 EME 14 / 06 EME 24 Marks: 100


Note:
1. ans any 5 full ques. choosing at lowest 2 ques. from part A & 2 ques. from part B
2. Use of steam tables is permitted

PART-A
1. (a) explain briefly the various sources of energy. [05 Marks]
(b) Steam at 10 bar and dryness 0.98 receives 140 kJ/kg at the identical pressure. What is the final state of the steam? [05 Marks]
(c) Sketch and discuss Lancashire Boiler. [10 Marks ]

. (a) What is a Steam turbine? discuss the principle of

2 operation of Impulse turbine? [10 Marks]
(b) discuss the working principle of closed cycle gas turbine. [05 Marks ]
(c) Sketch and briefly discuss Francis turbine. [05 Marks]
. 3 (a)
Exexplain with neat sketches and p-v diagram, the working principle of 4-Stroke petrol engine. [10 Marks]
(b) A 4-Stroke petrol engine of 100mm bore and 150mm stroke consumes 1kg of fuel per hour. The mean effective pressure is seven bar and it’s indicated thermal efficiency is 30%. The calorific value of the fuel is 40000 kJ/kg. obtain the crankshaft speed. [10 Marks]

4.
(a) What is Refrigeration? List the properties of an ideal Refrigerant. [05 Marks]
(b) discuss the principle and working of Vapour Compression Refrigeration with a neat sketch. [10 Marks]
(c) describe Air conditioning and discuss the principle of Air conditioning. [05 Marks ]

Earning:   Approval pending.