Previous year question paper for TD2 (Diploma Mechanical Engineering 4th)

1. Principles of I.C. Engines:- (10 hrs)

1.1 Introduction and classification of I.C. Engines.

1.2 Working principle of four stroke and two stroke cycles valve timing

diagram.

1.3 Petrol and diesel engines, their comparison and applications

1.4 Location and functions of various parts of I.C. engines and

materials used for them

1.5 Concept of IC engine terms: Bore, stroke, dead centres, crankthrow,

compression ratio, clearance volume, piston displacement

and piston speed. Familiarity with ISI specification for I.C. engine

parts.

2. Carburation and Ignition Systems of Petrol Engine:- (06 hrs)

2.1 Concept of carburetion

2.2 Airfuel ratio

2.3 Simple carburettor and its limitations

2.4 Description of a battery coil and magneto ignitions system.

3. Fuel System in Diesel Engines (07 hrs)

3.1 Components of Fuel system

3.2 Description and working of fuel feed pump

3.3 Fuel injection pump

3.4 Injector

3.5 Multi Point Fuel Injection System

4. Cooling and Lubrication (04 hrs)

4.1 Necessity of Engine Cooling

4.2 Cooling systems: their main features

4.3 Thermostat

4.4 Defects in cooling system and their rectification

4.5 Function of lubrication

4.6 Types and properties of Engine lubricants

4.7 Lubrication systems of I.C. engine

4.8 ISI specification and brand names of Engine lubricants.

4.9 Fault in cooling and lubrication system and their remedial actions. 

5. I.C. Engine Testing (08 hrs)

5.1 Engine power - indicated and Bra

5.2 Efficiency - Mechanical, Thermal, Relative and volumetric.

5.3 Methods of finding indicated and brake power.

5.4 Morse Test

5.5 Heat balance sheet

6. Air Compressors (06 hrs)

6.1 Industrial uses of compressed air

6.2 Classification - description of reciprocating and Rotary air

compressors

6.3 Fans, Blowers and supercharger

6.4 Working principle of reciprocating single and two stage

compressors,

6.5 Intercooling, volumetric efficiency.

6.6 Operation and Maintenance of reciprocating compressors.

7. Nozzles and Steam Turbines (07 hrs)

7.1 Energy equation as applied to a nozzle

7.2 Description of various types of turbines

7.3 Methods of reducing rotor speed in impulse turbines

7.4 Governing of steam turbine