Chapter-7_BME_Assignment_namodi



Government Engineering College, Palanpur
Mechanical Engineering Department 
Basic Mechanical Engineering (3110006)


Chapter: 7                                                                                 Internal Combustion Engine

  1. Define the following terms: (i) Scavenging, (ii) Compression ratio, (iii) Indicated thermal efficiency. (03) (Summer 2018)  
  2. With neat sketch describe the working of two stroke diesel engine.(07) (Summer 2018)
  3. Give comparison between Petrol and Diesel Engine. (03) (Summer 2017)
  4. List advantages and disadvantages of two stroke engines over four stroke engines. (03) (Winter 2017)
  5. Compare: S.I. engines and C.I. engines. (04) (Summer 2016) 
  6. Define following terms: swept volume, clearance volume, stroke length, compression ratio. (04) (Winter 2016)
  7. A six cylinder 4 stroke I.C. engine is to produce 95 kW brake power at 800 rpm. The stroke to bore ratio is 1.25, mean effective pressure is 7 bar. Determine the bore and stroke of the engine. Assume mechanical efficiency as 80%.  (07) (Summer 2017)
  8.       The following readings were recorded during the test on single cylinder four stroke diesel engine. (1)Cylinder diameter = 250 mm (2) Stroke length  = 350 mm (3) Mean effective pressure = 6.7 bar (4) Speed of engine   = 250 r.p.m. (5) Net brake load  = 1070 N (6) Effective brake drum diameter  = 1.5 m (7) Fuel consumption rate   = 10 kg per hour. (8) C.V. of   the fuel =   44300 kJ/kg. Calculate: (1) Indicated Power (2) Brake Power (3) Mechanical efficiency. (4) Brake thermal efficiency. (07) (Summer 2016)
  9. During a test on a single cylinder four stroke engine having compression ratio of 6, the following data is recorded, Bore=10 cm, stroke =12.5 cm, IMEP =2.6 bar, dead load on dynamometer =60 N spring balance reading =19N, Effective radius of fly wheel =40 cm, fuel consumption =1 kg/hr calorific value of fuel is 42000 K J/ Kg speed=2000rpm. Determine indicated power, brake power, mechanical efficiency, overall efficiency, air standard efficiency and relative efficiency. (07) (Winter 2017)


Comments

  1. N.A.Modi28 March 2019 at 05:12

    Find the solution of above three problems and comments answers here.

    ReplyDelete

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