Diploma thermal and automobile engineering important questions
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Thermal & Automobile Engineering
Department : Mechanical Engineering Scheme : M
2/3 Marks questions asked in Board Examinations
Note : 1. Highlighted Questions are asked two or more than two times
- Questions collected from October 2017 – October 2019 from board exam question paper
Unit – 1: Thermal power plant, steam Turbines and condenser, Refrigeration & Air Conditioning
- State two merits & demerits of thermal power plant
- Define condenser
- State the necessity for compounding and types of compounding of steam turbines.
- State the advantages of fluidized bed combustion.
- Draw the P-V diagram and T.S. diagram of a modified rankine cycle and indicate the various process involved in the cycle.
- State the function of electrostatic precipitator
- Define vacuum efficiency of a condenser.
- State the difference between impulse turbine & reaction turbine.
- State the sources of air present in condenser.
- What are the elements of a condensing plant.
- Define C.O.P
- What is the function of a cyclone separator.
- State the difference between vapour compression and vapour absorption system of refrigeration.
- Write the uses of cyclone separator
- Define COP of a refrigerator.
- Classify the types of condenser
Unit – 2 I.C. Engines and its components
- State the functions of piston rings
- What is the function of cam shaft?
- State the function of a flywheel.
- Compare wet liners with dry liners
- Define specific fuel consumption.
- Sketch the valve of an I.C. Engine and name its features.
- In a diesel engine, the s.f.c was obtained as 260 gm/kwhr. The calorific value of the fuel is 42,000 kj/kg. determine brake thermal efficiency.
- What is the purpose of using cylinder liners?
- How are the engines classified based on valves?
- Difference between petrol engine and diesel engine.
- Mention the material used for cylinder block and connecting rod.
Unit – 3, Automobile Cooling Systems, Lubrication Systems & Fuel
Feed System
- State the purpose of lubrication system.
- Sketch the thermo syphon system & name the parts.
- Define carburetion.
- What are the drawbacks of petrol injection system?
- Explain the service rating of lubricating oils.
- Give a detailed classification of carburetors.
- What are the types of oil pumps
- List the type of lubrication systems.
- What are the elements of the fuel feed system in a petrol engine?
- State the two troubles that occur in lubrication system.
- What is petrol lubrication system?
- State the main parts of a simple carburetor.
- Define cooling systems (in engines)
- What is the function of fuel filter & air cleaner.
Unit – 4 , Automobile transmission, Power trains & Chassis
- Name the components of clutch.
- Write down the types of gear boxes.
- What are the factors of wheel alignment?
- Explain the working of air suspension system.
- Make a list of the common clutch troubles.
- What is the use of collapsible steering system?
- State the merits of front independent suspension system.
- State any two purposes of gear box.
- State three troubles in clutches and their remedies.
- What are the types of stub axle
- What is the purpose of slip joint?
Unit-5, AUTOMOBILE BRAKE SYSTEM, ELECTRICAL EQUIPMENT AND POLLUTION CONTROL
- State any two troubles in ignition system and remedies for them
- List the important components of lighting system.
- Mention the causes of spongy brake.
- Enumerate the different tests ascertaining the condition of a battery.
- Explain the self energizing action of brake shoes.
- Explain the PCV system with a neat sketch
- Mention the types of starting motor devices
- List the major parts of a battery coil ignition system
- State the factors of wheel alignment
- Name the tests carried out in a battery
- State two troubles in ignition system and their causes.
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