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Printed pages: 2
Paper Id: 4050
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Sub Code: NME-505
Roll No.
B.TECH.
(SEM-FIFTH) THEORY EXAMINATION 2017-18
I C ENGINES & COMPRESSORS
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Time: 3 Hours
Total Marks: 100
Note: 1. Attempt all Sections. If require any missing data; then choose suitably.
SECTION A
- Attempt all questions in brief. 2 x10 = 20
- What is degree of reaction?
- What is Motor Octane No And Research Octane No. ?
- Write On Swirl & Squish.
- Draw Actual P-V Diagram For Four Stroke Engine.
- What Is Equivalence Ratio?
- Compute Bmep Of Four Cylinder 2 Stroke Engine, 100 Mm Bore, 125 Mm Stroke When It Develops A Torque Of 490 Nm.
- By What Process Crude Oil Is Separated Into Gasoline, Kerosene And Fuel Oil?
- Why Additives Are Added In Lubricants?
- What Is Catalytic Convertor?
- What Is Mean Effective Pressure?
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SECTION B
- Attempt any three of the following: 10 x 3 = 30
- Show That For Max Work/Kg Of Air Air In Otto Cycle For A Given Upper And Lower Temperature Of T3&T1 The Temperature At The End Of Compression T2 And The End Of Expansion T4 Are Equal & Are Given By T2 =T4 =(T1T3)1/2
- What Are The Type Of Combustion Chamber Used In C.I Engines?
- Explain Ignition Lag In S.I Engine? Discuss The Effect Of Engine Variables On Ignition Lag.
- Compare The Otto And Diesel Cycle For Same Maximum Pressure And Heat Input & Same Compression Ratio And Heat Rejection.
- Prove That Mean Effective Pressure =(nth× AP)/(r-1)(y-1)
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SECTION C
- Attempt any one part of the following: 10 x 1 = 10
- What Do You Understand By Surging And Stalling In An Axial Flow Compressor?
- Explain The Working Of Thermos Syphon Coling System With Neat Sketch.
- Attempt any one part of the following: 10 x 1 = 10
- Discuss The Effect Of Gasoline Volatility On Cold Starting, Hot Starting, Warm Up And Vapour Lock. What Is The Performance Number And Diesel Index?
- Write Short Notes On –Root Blowers With Diagram, Exhaust Blow Down.
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- Attempt any one part of the following: 10 x 1 = 10
- What Is Crankcase Ventilation & Its Type?
- Explain Biogas Plant With Proper Diagram
- Attempt any one part of the following: 10 x 1 = 10
- Describe The Operation Of Any Two Types Of Modern Fuel Injection System With Sketch And Also Explain Working Of Pintle Nozzle And Pintaux Nozzle With Sketch.
- Prove That In Case Of Reciprocating Compressor The Condition For Minimum Work Per Kg Of Air Delivered By Its Two Stage With Inter-cooling Is Achieved When Intermediate Pressure Is Geometric Mean Of Suction Pressure And Final Delivery Pressure.
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- Attempt any one part of the following: 10 x 1 = 10
- Explain Willan's Line And Morse Test.
- Derive An Expression For Mean Effective Pressure For Diesel Cycle
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