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Chapter_5_BME_Assignment_namodi

Chapter: 5                                                                                                             Heat Engine        Classify and explain the thermodynamic system with giving two suitable engineering examples of each. (03) (Summer 2018)        Define heat engine. Explain the essential requirements of heat engine with suitable figure. (04) (Summer 2018)      Draw air standard diesel cycle on p-V and T-s diagrams. Derive equation for air standard efficiency of Diesel cycle. (07) (Summer 2017,2016)         With usual notations derive expression for air standard efficiency of Otto cycle. (03) (Winter 2017)            Calculate the air standard efficiency of the engine working on Otto cycle in which air initially at 1 bar and 20°C is compressed adiabatically to the pressure of 16 bar. Maximum pressure of cycle is 45 bar and adiabatic index    γ =1.4. (04) (Summer 2016)       An engine operating on the ideal diesel cycle has a maximum pressure of 45 bar and a
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Chapter:-08,09,10_BME_Assignment_namodi

  Chapter:8                                                                                                                                  Pumps With neat sketch explain construction and working of gear pump and screw pump. (04) (Summer 2018) (Winter 2017) What is priming? Why it is required in centrifugal pump but not in reciprocating pump. (03) (Summer 2017) With neat sketch explain in brief the working of Vane pump. (03) (Summer 2016) Differentiate between reciprocating pump and centrifugal pump.(04) (Winter 2017) Chapter: 9                                                                                                                       Air Compressors       What are the applications of air compressor? Derive an expression of work done for single stage single acting reciprocating air compressor without clearance. (07) (Summer 2018)     In air compressor, air enters at 1.013 bar and 270C having volume of 5 m3/ kg and it is compressed to 12 bar iso
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Chapter-11,12,13_BME_Assignment_namodi

Chapter:- 11                                                    Differentiate between a Brake and a Clutch. (03)  (Summer 2016) What are bearings? How are they classified? (03) (Summer 2018) Explain flange coupling with neat sketch    (04) (Summer 2017) What is brake?  Describe an internal expanding shoe brake with a neat sketch and state its applications. (07) (Summer 2017) (Winter 2016,2018) With neat sketch explain construction and working of cone clutch.(03)  (Winter 2016) Chapter:- 12 Explain with neat sketch the working of belt drives, Chain drive and gear drives. (Summer 2016) (Winter 2016,2018) Compare Belt drive, Chain drive and Gear drive. Chapter:- 13   Define: Resilience, Creep, Ductility, Hardness, Elasticity, Fatigue.  (Summer 2018) (Winter 2017) Classify plain carbon steel. Compare their properties and application.(03) (Summer 2018) Classify properties of engineering material.(03) (Summer 2017,2016) List properties and application of Titaniu
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Chapter-4_BME_Assignment_namodi

        Chapter: 4                                                                                            Properties of Steam   Define the following terms: (i) Heat of superheat (ii) Degree of superheat (iii) Critical point (iv) Latent Heat. (04) (Summer 2018)   With a neat sketch explain structure and working of combined separating and throttling   calorimeter and derive the suitable equation for finding the dryness fraction of steam. (07) (Summer 2018)   Explain steam formation with figure also draw T-H diagram. (07) (Summer 2017, Winter 2018)   Define the terms 1.Melting point 2.Boiling point 3.Critical point (03) (Summer 2017) What is throttling calorimeter? Explain its limitation.  (03) (Winter 2018)  Dryness fraction of steam cannot have the value more than unity: Justify  (03) (Winter 2018)   Calculate the total amount of heat required to produce 6 kg of steam at a pressure of 6 bar and temperature of 258 °C from the water at 30 °C. Take specific heat of steam =
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Chapter-3_BME_Assignment_namodi

      Chapter:3                                                                                               Properties of Gases Define: Gas Constant, FAD (Summer 2018) Derive characteristics equation of a perfect gas with the help of Boyle’s law and Charle’s law. (03) (Summer 2018) What is adiabatic process? Prove with usual notations the law of governing adiabatic process as PV γ = Constant. (07) (Summer 2018) (Winter 2017)   Prove that Cp – Cv =R. (03) (Summer 2017,2016) Describe Isothermal process and derive expression for Workdone, Change in Internal energy, Heat transfer and Change in Enthalpy. (07) (Winter 2018)   A cylinder contains 0.6 m3 of a gas at a pressure of 1 bar and 90 °C. The gas is compressed to a volume of 0.18 m3 by the law PVn = C. The pressure of gas at the end of compression is 5 bar.   Calculate: (1)Mass of gas (2) value of index n (3) The change in internal energy of the gas. (4) Work done (5) The heat received or rejected by the gas during t
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Lancashire Boiler_BME

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This type of boiler is used in sugar mills and textile industries where, the steam is    required for power generation as well as for the process work. This boiler is also used in chemical industries. Specifications :  The specifications of one such boiler are as under.            Shell diameter            : 2 to 3 m            Length of shell           : 7 to 9 m  Working pressure      : 16 bar  Steam capacity          : 8000-9000 kg / hr        Efficiency                  :  50 to 70 % Characteristics of boiler :  1.It is horizontal.  2.  It is stationary. 3.  It is fire tube type. 4.  It is internally fired. 5.  It is multi tube boiler. 6.  It has natural circulation of hot gases. 7.  It burns solid fuel. 8.  It is a medium pressure boiler. Working :  The water is fed into the boiler shell through the feed check valve.  The level of the water is adjusted with the help of water level indicator.  Coal is added to the grate through the fire hole.  The coa
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Babcock and Wilcox Boiler_BME

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BABCOCK AND WILCOX BOILER  This boiler is exclusively used when pressure is above 25 bar and capacity requirement is in excess of 7000 kg of steam/hr. It is a water tube boiler. It is used to operate at high pressures. Specifications :  The particulars relating to one such boiler is given as under.  Diameter of drum   : 2000 to 4000 mm  Length    : 6000 to 9000 mm  Size of the water tubes  : 76.2 to 101.6 mm  Size of the upper header tubes : 38.4 to 57.1 mm  Maximum working pressure : 42 bar  Maximum steaming capacity : 40,000 kg/hr  Efficiency    : 60 to 80 % Characteristics of boilers  1.It is horizontal. 2. It is stationary. 3. It is water tube. 4. Number of tubes are many. 5. It is externally fired. 6. It is has natural circulation for water. 7. It has a forced circulation for air and hot gases. 8. It uses both solid as well as liquid fuel. 9. It is high pressure boiler. Working:  The water is fed into the boiler shell through the feed check valve.
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