STUPIDSID
1(a)
State the material used for making of the following parts, stating reason Twist drill, milling cutter.
2 M
1(b)
Compare properties of ferrous and non- ferrous metals.
2 M
1(c)
Define the following properties of material.
Ductility, Toughness, Hardness, Creep.
Ductility, Toughness, Hardness, Creep.
3 M
Solve any one question from Q.1(d) &Q.1(e)
1(d)
Sketch the iron-carbon equilibrium diagram and point out its salient features.
7 M
1(e)
What is the purpose of testing engineering materials? Explain the following reactions in relation to iron carbon equilibrium diagram.
7 M
2(a)
Distinguish between
i) Range and span
ii) Error and accuracy
iii) Accuracy and precision
i) Range and span
ii) Error and accuracy
iii) Accuracy and precision
2 M
2(b)
Explain how sine bar used for setting an angle and for finding an unknown angle.
2 M
2(c)
Describe the construction and use of dial gauge.
3 M
Solve any one question from Q.2(d) &Q.2(e)
2(d)
Explain the principal of operation of rotameter for discharge measurement.
7 M
2(e)
Describe with a neat sketch, the working of a bimetallic thermometer.
7 M
3(a)
Distinguish between inward and outward flow reaction turbine.
2 M
3(b)
Distinguish between positive displacement and non-positive displacement compressor.
2 M
3(c)
Sketch the general arrangement of a hydropower plant and state the function of its different components.
3 M
Solve any one question from Q.3(d) &Q.3(e)
3(d)
Water is flowing though an inclined conical pipe, 100m long. It has 600mm diameter at the upper end and 300mm at the lower end the discharge rate is 50 lit/sec. The pipe has a slope of 1/2:15. Find the pressure at the lower end if the pressure at the upper end is 2.5 bar.
7 M
3(e)
Water flows through 200mm diameter pipe. The point A and B are at elevation of 6m and 8m, respectively along the inclined pipe. The pressure at A and B are 50 kPa and 20 kPa, respectively if the flow rate is 60 lit/s determine
i) Direction of low.
ii) Head loss between these points.
i) Direction of low.
ii) Head loss between these points.
7 M
4(a)
What are the properties of good refrigerant?
2 M
4(b)
Prove that (COP)R+1=(COP)H.P
2 M
4(c)
''Equivalent evaporation from and at 100°C''. Explain the meaning of the term and give the reason for its use in the context of boiler performance.
3 M
Solve any one question from Q.4(d) &Q.4(e)
4(d)
Obtain an expression for draught produced in mm of water column when the discharge is maximum.
7 M
4(e)
The pressure volume correlation for a non-flow reversible (quasi-static) process is given by p=(8-4V) bar, where V is in m3. If 150 KJ of work is supplied to the system determine the final pressure and volume of the system. Take initial volume 0.6m3.
7 M
5(a)
What is cutoff ratio? How does it affect the air standard efficiency of an Otto cycle?
2 M
5(b)
How is the mean effective pressure for reciprocating engine defined?
2 M
5(c)
Compare diesel engine with petrol engine with reference to maximum pressure, efficiency power to weight ratio, cost and load control. Give explanation.
3 M
Solve any one question from Q.5(d) &Q.5(e)
5(d)
A gas engine working on Otto cycle operates with the following parameter's inlet condition 1 bar pressure 320 k temperature compression ratio 4:1 and pressure ratio 4:1. If the working fluid is air with R=287 J/Kg k and Y=1.4. Make calculation for useful workdone, thermal efficiency and mean effective pressure.
7 M
5(e)
With the help of P-V and T-S diagrams. Show that for the same maximum pressure and heat input.
ηdiesel>ηdual>ηotto
ηdiesel>ηdual>ηotto
7 M
More question papers from Basic Mechanical Engg.