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Description : State the functions and materials of following engine components: (i) Piston (ii) Connecting rod (iii)Crank shaft (iv)Exhaust manifold
Last Answer : Engine components Material Functions Piston Cat aluminum alloy To transmit the force of explosion to the crankshaft. To form seal so that the high pressure gases in ... atmosphere through the exhaust pipe after combustion stroke is completed. To keep back pressure minimum.
Description : State the functions following ignition system components (i) Ignition coil (ii) Distributor (iii)Condenser (iv)Spark plug
Last Answer : Functions following ignition system components: (i) Ignition coil: Ignition coil receives voltage from primary circuit and convert it to very high voltage up to 28000 volts required for spark by means of ... Charge of air and petrol is ignited by means of the spark produced by spark plug.
Description : Draw neat sketch of valve timing diagram for 4-stroke petrol engine & label it.
Last Answer : Figure: Valve timing diagram of 4 stroke SI engine
Description : (i) state any two applications of I. C. Engine (ii) Draw a neat sketch of Two stroke petrol engine.
Last Answer : Applications of I.C engine 1) In Automotive - i) Two stroke engine - Mopeds, Scooters. ii) Four stroke engine - Light vehicles, Heavy vehicles. 2) Marine Application - Ships, Boat 3) Locomotive s - ... handling system (ii) Draw a neat sketch of Two stroke petrol engine. OR
Description : Describe the working of four stroke C. I. engine with neat sketch.
Last Answer : Working principle of CI engine: 1. Suction stroke: During this stroke, inlet valve is open and exhaust valve is closed. Only air is sucked into cylinder during this stroke. The ... burnt gases outside the combustion chamber. Crankshaft rotates by two complete revolutions through 720˚.
Description : Draw the neat sketch of overhead valve operating mechanism and explain its working.
Last Answer : Overhead valve mechanism: Figure shows the valve mechanism to operate the valve when it is in the cylinder head (in I and F head design). This type of mechanism requires two additional moving parts the push ... close. A spring (attached to the valve) returns the valve to its seated position.
Description : Explain working of over head valve mechanism with neat sketch.
Last Answer : Overhead valve mechanism: Figure shows the valve mechanism to operate the valve when it is in the cylinder head (in I and F head design). This type of mechanism requires two additional moving parts the ... to close. A spring (attached to the valve) returns the valve to its seated position.
Description : (i) Illustrate with neat sketch the working of absorber type of muffler (ii) sketch bellow type of thermostat
Last Answer : (i) Working of absorber type of muffler: It consists of a perforated tube, around which a sound absorbing material, like fiber glass or steel wool is placed. The exhaust gases pass through the perforated tube. ... thus reducing the noise intensity. (ii) Bellow type of thermostat:
Description : Illustrate with neat sketch the working of battery ignition system.
Last Answer : Battery ignition system': Figure shows line diagram of battery ignition system for a 4-cylinder petrol engine. It mainly consists of a 6 or 12 volt battery, ammeter, ignition switch, auto- ... charge is ignited-combustion startsproducts of combustion expand and produce power. OR
Description : Illustrate with neat sketch the construction of fuel injector
Last Answer : Diesel Fuel Injector: The injector assembly consists of - i) a needle valve ii) a compression spring iii) a nozzle iv) an injector body. When the fuel is supplied to lift the injection pump it ... and hence the valve opening pressure is controlled by adjusting the screw provided at the top.
Description : Describe the working of water/liquid cooling system with neat sketch.
Last Answer : A water-cooled engine block and cylinder head have interconnected coolant channels running through them. At the top of the cylinder head all the channels converge to a single outlet. A pump, driven by a ... speed increases. There is no necessity of maintaining the water up to a correct level.
Description : Statement: Valve Cooling is necessary in some I. C. Engine. Justify the statement by giving reasons and explain its working with sketch.
Last Answer : Reasons: Exhaust valve temperature in modern engine is as high as 750˚C. Thus cooling of exhaust gas becomes very important. Cooling water jackets are arranged near the valves for valve cooling. In many ... given to cooler stem as it falls back to stem again. This keeps the valve head cool.
Description : Describe working principle of 4 – Stroke Petrol (Engine) with sketch
Last Answer : Working of four stroke petrol engine: 1. Suction stroke: During this stroke, inlet valve is open and exhaust valve is closed. The piston moves from TDC to BDC and crank shaft rotates ... gases outside the combustion chamber. Crankshaft rotates by two complete revolutions through 7200 .
Description : Draw a labeled sketch of pump feed fuel supply system for petrol engine and state location and function of each component.
Last Answer : The pump feed system is shown in the figure above. Fuel tank is for storage of fuel located above the engine of two wheeler and in case of car located at backside of the car ... the tendency of forming vapor lock. The system provides the fuel requirement at various engine speeds efficiently.
Description : State the materials used for piston with justification.
Last Answer : Material used for Piston: Cast Iron, Cast Steel, Forged Steel, Cast Aluminum Alloys and Forged Aluminum Alloy. Cast Aluminum Alloys is the most commonly used material for piston because; 1. Cast ... . 4. It allows to utilize more of the force produced by combustion to power the application.
Description : List any four components of C.I. engine.
Last Answer : Components of C.I. engine. 1. Engine Head 2. Crankshaft 3. Camshaft 4. Engine block 5. Fuel injector 6.Fuel Pump 7.Fuel Distributor 8. Cylinder liner 9. Piston
Description : Explain the working of S. U. Electrical Fuel Pump with sketch.
Last Answer : S. U. Electrical Fuel Pump: Working of Electric Fuel Pump: It consists of a diaphragm which is operated electrically. By turning on the ignition switch, the solenoid winding generates ... the same process is repeated, the pump continues to operate until the ignition switch is turned off.
Description : Describe the construction of gear drive of camshaft drive arrangement with sketch.
Last Answer : Gear Drive of Camshaft Drive: Camshaft is driven by the crankshaft either by a pair of meshing gears (timing gears) or by means of a pair of timing sprocket connected by a chain ... and crankshaft to ensure opening the valves exactly at the correct time in relation to piston position.
Description : Elaborate the working of dry sump lubrication system with sketch.
Last Answer : Dry Sump Lubrication: Working of dry sump lubrication system: In this system, the lubricating oil is not stored in oil sump .The oil from the sump is carried to a ... engines. The pressure relief valves are used to maintain the predefined pressure value inside the lubricating system
Description : Explain the working of overhead valve arrangement with sketch.
Last Answer : Overhead Valve Arrangement: Figure shows the valve mechanism to operate the valve when it is in the cylinder head (in I and F head design). This type of mechanism requires two additional ... on the valve stem to open the valve, thus connecting the valve port with the combustion chamber.
Description : Sketch and label simple carburettor
Last Answer : Fig. Simple Carburettor
Description : State the function of the following components. (i) Cam Shaft (ii) Crank Shaft
Last Answer : Camshaft: The camshaft is a mechanical component of an internal combustion Engine. It opens and closes the inlet and exhaust valves of the engine at the right time, with the exact ... translate the linear reciprocating motion of a pistons into the rotational motion required by the automobile.
Description : List all the components of petrol fuel supply system.
Last Answer : Components of Petrol fuel supply system: 1) Fuel Tank 2) Flexible fuel line 3) Fuel tank to fuel pump line 4) Fuel pump 5) Fuel filter 6) Carburetor or Injector
Description : The energy of expanding gas is transferred by piston to connecting rod through a. Crank pin b. Gudgeon pin c. Bearing d. Crankcase (Ans:b)
Last Answer : Which of the following is not used in four stroke compression-ignition (CI) engines? a. Fuel pump b. Spark plug c. Fuel injector d. Inlet and outlet Valves (Ans:b)
Description : Explain the working of electrically driven fan in cooling engine.
Last Answer : Working of Electrically Driven Fan in Cooling Engine: The fan is driven by a separate electric motor which is supplied with power directly from the electric circuit of the engine. A thermostat switch is ... the time the fan motor remains in ON position, while 95% of the time it is off.
Description : Select firing order for 4 – Cylinder engine with justification.
Last Answer : Firing orders for 4 cylinder engine: 1-3-4-2 The firing order must be considered on the basis of engine vibrations and engine cooling. Also the firing order affects the balancing of engine ... sufficient travel time to exhaust gases. So that development of high back pressure would be avoided.
Description : Compare 2-stroke and 4 – stroke engine
Last Answer : S. N. Four Stroke Engine Two Stroke Engine 1 One working stroke for every two revolutions of the crankshaft. One working stroke for each revolutions of the crankshaft 2 Turning ... Engine is air cooled 10 Engine requires more space. Engine requires less space.
Description : State any two limitations of engine cooling system.
Last Answer : Limitations of Engine Cooling System: 1. This is a dependent system in which water circulation in the jackets is to be ensured. 2. Power absorbed by the water pump is more and it affects ... requires considerable maintenance. 5. The failure of the system results in serious damage to the engine.
Description : Explain the procedure of Morse Test” to be conducted for four cylinder petrol engine.
Last Answer : Morse Test: Used for multi cylinder engines Procedure: 1. The engine is run at the required speed and the torque is measured. 2. One cylinder is cut out by shorting the plug if an S.I. engine is under test. 3. ... -B4 Total IP of Engine = I1+I2+I3+I4 Friction Power F.P. = I.P - B.P
Description : List any two major requirements of fuel injection system. Draw a layout of fuel injection system used in diesel engine.
Last Answer : Requirements of fuel injection system 1) Metering - The fuel injection system must measure the fuel supplied to the engine very accurately as fuel requirements vary from low to high engine speeds. 2) Time- ... and stop injection- The injection fuel must start and end quickly. OR
Description : Select type of a muffler for a motorcycle engine with justification.
Last Answer : Type of a muffler for a motorcycle engine 1. Baffle type 2. Resonance type 3. Absorber type Multiple Baffle Silencers In a multiple baffle silencer, the exhaust gas escapes ... absorbing material reduces the high pressure fluctuation of the exhaust gases thus reducing the noise intensity.
Description : Describe working principle of four stroke diesel engine with the help of sketches.
Last Answer : Suction stroke: During this stroke, inlet valve is open and exhaust valve is closed. The piston moves from TDC to BDC and crank shaft rotates through 180˚. The downward movement of ... the burnt gases outside the combustion chamber. Crankshaft rotates by two complete revolutions through 720.
Description : State the functions of nozzles. Classify nozzles used in diesel engine.
Last Answer : Functions of nozzle: 1) To atomize fuel by converting it in to fine droplets. 2) To convert pressure energy in to kinetic energy. 3) To inject the fuel at right quantity at right time with ... Single hole nozzle 2) Multi-hole nozzle 3) Long stem nozzle 4) Pintle nozzles 5) Pintuax nozzles
Description : Write the specifications of I.C. engine used in a two wheeler four stroke vehicle.
Last Answer : Engine specifications for two wheeler 1. Engine of Bajaj Discover 125 ST - Air-cooled, 4-stroke 124.6 cc engine - Maximum power of 12.8 Bhp at 9000 rpm - Maximum torque of 11 Nm at 7000 rpm OR 2. Honda Livo a) BS- ... rpm. d) Bore x Stroke - 50 x 55.6 mm e) C R - 9.9 : 1, Max Speed - 86KMPH
Description : State the need of cooling system of I.C.engine.
Last Answer : Need of cooling system : The cooling system is needed to keep the engine from not getting so hot as to cause problems and yet to permit it to run hot enough to ensure maximum efficiency of ... provided to prevent the damage of mechanical parts as well as to obtain maximum performance of the engine.
Description : Classify I.C. engine on the basis of cycle of operation and cylinder arrangement.
Last Answer : 1) Cycle of operation:- a) Otto cycle engine b) Diesel cycle engine c) Duel combustion cycle engine or semi- diesel cycle engine. 2) Arrangement of cylinder:- a) Vertical engine b) horizontal engine c) Radial engine d) V-engine e) Opposed cylinder engine
Description : State the common firing orders used in 4 cylinder engine.
Last Answer : Firing order: The sequence in which the power impulses occur in an engine is called the firing order. Firing order for 4 cylinder engine.(Any one) 1-3-4-2 OR 1-2-4-3 OR 1-4-3-2
Description : Classify I. C. Engine on the basis of -Cycle of operation -Method of cooling
Last Answer : Classification of I. C. Engine on the basis of -Cycle of operation: a) Otto cycle engine b) Diesel cycle engine c) Duel combustion engine or semi-diesel cycle engine -Method of cooling: a) air cooled engine b) water cooled engine
Description : Define internal combustion engine
Last Answer : Definition of I. C. engine: The I. C. engine means Internal combustion engine in which combustion i.e. burning of fuel in presence of air takes place inside the combustion chamber (closed volume).
Description : Addition of 2% nickel in steel makes it suitable for making (A) Electronic valves (B) Boiler plates, rivets etc. (C) Turbine blades (D) Connecting rod
Last Answer : (B) Boiler plates, rivets etc.
Description : Within the external combination engine, a piston rod is usually connected to the cross head by means of....... A. Cotter joints B. Universal joints C. Knuckle joint D. Bearing
Last Answer : A. Cotter joints
Description : In steam engine, the piston rod is usually connected to the cross head by means of a....... A. Cotter joints B. Universal joints C. Knuckle joint D. Bearing
Description : When a vehicle passes, TV reception gets distorted. This is because – (1) metal reflects radiowaves (2) spark plug creates electromagnetic disturbances (3) vehicle pollution affects the performance of the TV components (4) modern vehicles use electro ignition system
Last Answer : (2) spark plug creates electromagnetic disturbances Explanation: This is caused due to the interference caused by the electromagnetic waves generated by a passing vehicle. These waves were within the same ... in which two waves superimpose to form a resultant wave of greater or lower amplitude.
Description : When a vehicle passes, TV reception gets distorted. This is because (1) metal reflects radiowaves (2) spark plug creates electromagnetic disturbances (3) vehicle pollution affects the performance of the TV components (4) modern vehicles use electroignition system
Last Answer : spark plug creates electromagnetic disturbances
Description : Why Joel's engine is unable to power his car the way it used to. The spark plug is working and the engine is compressing properly so what could be the problem?
Last Answer : Could be a fuel delivery problem such as a dirty fuelfilter.
Description : Which of the following is not related to spark ignition engine? a. fuel injector b. spark plug c. flywheel d. distributor
Last Answer : ANSWER a. fuel injector
Description : A spark plug is used in a. petrol engine b. diesel engine c. gas engine d. steam engine
Last Answer : ANSWER a. petrol engine
Description : ernal combustion engine that does not use spark plug is
Last Answer : Diesel engine.
Description : State the function of the following parts in a heat engine: a) Crank shaft b) spark plug c) carburettord) kick starter e) inlet valve f) outlet valve
Last Answer : a) Crankshaft converts the linear movement of piston into circular motion. b) Spark plug is used in petrol engine to ignite the mixture of petrol and air in the cylinder. c) Carburettorhelps to mix ... -air or air into the cylinder. f) Outlet Valve allows the exhaust gases out of the cylinder.