State the general conditions necessary for combustion.

State the general conditions necessary for combustion.
by

1 Answer

Answer :

Three things are required in proper combination before ignition and combustion can take place Heat, Oxygen and Fuel. There must be Fuel to burn. There must be Air to supply oxygen. There must be Heat (ignition temperature) to start and continue the combustion process.
by

Related questions

Describe the procedure to locate leakage in Compressed Natural Gas Fuel supply system of a car. State relevant precaution.

Description : Describe the procedure to locate leakage in Compressed Natural Gas Fuel supply system of a car. State relevant precaution.

Last Answer : Procedure to locate Leakage in Compressed Natural Gas Fuel Supply System of a Car: 1. The first indicator is the foul smelling agent present in CNG.. 2. The second level of test you can do is to take a ... , incense sticks, etc. 2. Close the CNG regulator and 3. Put the safety cap on the cylinder.

State four method to control diesel smoke.

Description : State four method to control diesel smoke.

Last Answer : Methods to Control Diesel Smoke : 1. De-rating:- At lower loads, the air: fuel ratio obtained will be leaner & hence the smoke developed will be less. However this means a loss ... the intake manifold. This shortens the delay period- curbs thermal cracking which is responsible for soot format 

State the function and location of oxygen sensor and mass air flow sensor.

Description : State the function and location of oxygen sensor and mass air flow sensor. 

Last Answer : Name Function Location Oxygen Sensor Measuring quantity of oxygen in exhaust  Located at inlet and outlet side of catalytic convertor Mass Air Flow Sensor It is used to tell ECU the mass of air entering the engine. Mounted between air filter and turbocharger.

State the effect of detonation.

Description : State the effect of detonation.

Last Answer : Effects of Detonation: 1. Noise and roughness: Mild knock is seldom audible and is not harmful. When intensity of knock increases a loud pulsating noise is produced due to development of a ... and combustion chamber wall and this overheating leads to ignite the charge before the passage of spark.

Describe three engine modifications to be done to reduce SI engine Emission.

Description : Describe three engine modifications to be done to reduce SI engine Emission.

Last Answer : Engine Modifications to be Done to reduce SI Engine Emission are: 1. Use of leaner air-fuel ratios: The carburettor may be modified to provide relatively lean air fuel mixtures during ... tolerances and using special type of carburettors. This also includes fuel injection in manifold.

Describe the idle speed control function of an electronic control module with neat sketch.

Description : Describe the idle speed control function of an electronic control module with neat sketch.

Last Answer : Idle Speed Control System as Output Function of ECM: While the engine is being started, or operated, the logic module of Electronic Control Module (ECM) will signal the Stepper motor of Idle Speed ... speed control valve stepper motor allows 125 possible valve opening positions. OR

Describe the working of high pressure pump used in CRDI system.

Description : Describe the working of high pressure pump used in CRDI system.

Last Answer : Working of High Pressure Fuel Pump Used In CRDI System: * The fuel inlet to the pump is controlled by the SCV (suction control valve) through the EDC * The rotation of the inner cam pushes ... maintained in the common rail. Figure: Sectional View of High Pressure Pump used in CRDI System

Describe the working of electronic fuel injector with the help of suitable sketch.

Description : Describe the working of electronic fuel injector with the help of suitable sketch.

Last Answer : Working of Electronic Fuel Injector: In MPFI system, Top feed fuel Injector is used. These injectors are solenoid-operated valves that are opened and closed by means of electric pulses from the ECU. The ... Pintle and discharge opening to form a fine spray pattern that has a cone shape.

Compare the SI and CI engine on the basis of: (i) Compression Ratio (ii) Operating Speed (iii) Power O/P per weight.

Description : Compare the SI and CI engine on the basis of: (i) Compression Ratio (ii) Operating Speed (iii) Power O/P per weight.

Last Answer : Parameter SI Engine CI Engine (i) Compression Ratio Compression ratio is low, about 10:1 limited by detonation Compression ratio is higher, about 18:1 to 22:1 (ii) ... due to lower compression ratio. Power output is more than SI engine due to higher compression ratio.

Describe the working of PCV System.

Description : Describe the working of PCV System.

Last Answer : Working of PCV system:  During normal compression stroke, a small amount of gases in the combustion chamber escapes past the piston. Approximately 70 % of these blow-by' gases ... , crankcase ventilation performance is optimized, while engine performance and drivability remains unaffected. 

Sketch and describe the layout of series hybrid vehicles.

Description : Sketch and describe the layout of series hybrid vehicles. 

Last Answer : Series-Hybrid vehicle  In Series Hybrid vehicles, the Internal Combustion Engine (ICE) drives a generator, which charges the battery and supplies current to the electronically controlled motor. The ... drive have to be rated to the maximum power. It has low overall system efficiency.

Describe the working of pressure regulation in PFI system with the help of schematic diagram.

Description : Describe the working of pressure regulation in PFI system with the help of schematic diagram.

Last Answer : Working of Pressure Regulator in PFI System: The fuel pump provides more fuel than the maximum required by the engine. Fuel not used by the engine is returned to the fuel tank. The fuel rail supplies all injectors. ... between 2.0 and 3.5 bar and allows excess fuel to return to the fuel tank.

Describe any four methods to improve fuel economy.

Description : Describe any four methods to improve fuel economy. 

Last Answer : Methods to Improve Fuel Economy: 1. Use of multi-functional fuel additives will provide 3 to 4% fuel economy. 2. Good driving habits. 3. Properly maintained fuel supply system. 4. ... computer controlled ignition system. 6. Use of higher voltage automotive electrical system (42 volts system).

Describe features of Variable Valve Timing Mechanism (VVT)

Description : Describe features of Variable Valve Timing Mechanism (VVT)

Last Answer : Features of VVT: Variable valve timing (VVT) is a system for varying the valve opening of an internal combustion engine. This allows the engine to deliver high power, but also to work tractably ... actually driven by that fast cam. Therefore, fast timing and high lift are obtained in both valves 

LPG is used as a fuel for petrol engine. Justify your answer.

Description : LPG is used as a fuel for petrol engine. Justify your answer.

Last Answer : LPG is used as a fuel for petrol engine, because of its following advantages  1. It is cheaper than petrol 2. It is highly detonation resistant and does not pre-ignite easily. 3. It gives ... modified. LPG kits are readily available (even for MPFI engines) and the kit cost is mostly affordable. 

Sketch and describe LPG fuel supply system layout.

Description : Sketch and describe LPG fuel supply system layout.

Last Answer : Figure: LPG Fuel Supply System Layout for SI Engine.  The system works by pumping LPG at high pressure from the LPG vehicle tank to the engine inlet manifold via a set of liquid ... intake manifold. The fuel vaporizing in the intake manifold cools and increases the density of the intake air.

Describe operation of CRDI system.

Description : Describe operation of CRDI system.

Last Answer : Operation of CRDI System: High pressure pump provides high pressure fuel to the common rail. The common rail stores the fuel and maintains a constant pressure in the common rail line (approximately 1500 bars ... needle movement.  Figure: Layout of Common Rail Fuel System for Diesel Engine

Illustrate with example of fuel injection as an output control function of ECM.

Description : Illustrate with example of fuel injection as an output control function of ECM.

Last Answer : Fuel Injection as an Output Control Function of ECM: ECM controls fuel injection by calculating A: F ratio needed for engine. Engine requires different air fuel ratios while cranking, warm- up, idle, ... open, allowing enough air into the engine for start and idle (Throttle body valve is closed).

Describe the Air Fuel Ratio in CI Engine.

Description : Describe the Air Fuel Ratio in CI Engine.

Last Answer : Air Fuel Ratio in CI Engine: Thermodynamic analysis of the engine cycles has clearly established that operating an engine with a leaner air-fuel ratio always gives a better thermal efficiency but the ... always designed to operate with an excess air of 15 to 40% depending upon the application.

List two disadvantages and advantages of CNG

Description : List two disadvantages and advantages of CNG

Last Answer : Dis - advantages: 1. Low engine performance. 2. Low engine volumetric efficiency. 3. Need of large pressurized fuel storage tank. 4. Refuelling is a slow process 5. Inconsistent fuel properties ... toxic. 11. CNG is lighter than air and so Dissipates into atmosphere implies less chance of fire

List four drawback of carbureted SI Engine.

Description : List four drawback of carbureted SI Engine.

Last Answer : Drawback of Carbureted SI Engine: 1) Air-Fuel Ratio: As in SI engine Air-fuel ratio varies from 8:1 to 18.5:1 i.e. from 8 kg of air/kg of fuel to 18.5 kg of air/kg of fuel. Richer or leaner air-fuel ... from 8 kg of air/kg of fuel to 18.5 kg of air/kg of fuel. So emission is more in SI engine.

How many conditions exist in wax combustion ?

Description : How many conditions exist in wax combustion ?

Last Answer : Three conditions exist.

For spark ignition engine, the equivalence ratio of mixture entering the combustion chamber has values (A) for idling and for peak power conditions (B) for both idling and peak power conditions (C) for idling and for peak power conditions (D) for both idling and peak power conditions

Description : For spark ignition engine, the equivalence ratio of mixture entering the combustion chamber has values (A) for idling and for peak power conditions (B) for both idling and peak power conditions (C) for idling and for peak power conditions (D) for both idling and peak power conditions

Last Answer : ANSWER (B) for both idling and peak power conditions

Which conditions are fulfilled in case of combustion? (a) Oxygen is reduced (b) Burning compound undergoes oxidation (c) Oxygen is reducing agent (d) Both (a) and (b)

Description : Which conditions are fulfilled in case of combustion? (a) Oxygen is reduced (b) Burning compound undergoes oxidation (c) Oxygen is reducing agent (d) Both (a) and (b)

Last Answer : (d) Both (a) and (b)

In addition to carbon dioxide and water, state two other conditions necessary for the process of photosynthesis to take place. -Science

Description : In addition to carbon dioxide and water, state two other conditions necessary for the process of photosynthesis to take place. -Science

Last Answer : Sunlight and chlorophyll.

(i) What are the geographical conditions necessary for the cultivation of groundnuts ? -Geography

Description : (i) What are the geographical conditions necessary for the cultivation of groundnuts ? -Geography

Last Answer : (i) Geographical conditions necessary for the cultivation of ground nuts : 1. It requires a tropical or sub-tropical climate. 2. Rainfall should be between 50 to 75 cm and temperature should be ... rains, stagnant water and frost. (iii) Two non edible oil seeds grown-castor and linseed.

Mention any three necessary conditions for the development of resources. -SST 10th

Description : Mention any three necessary conditions for the development of resources. -SST 10th

Last Answer : (i) Resources can contribute to development only when they are accompanied by appropriate technological development and institutional changes. (ii) There is need for quality of human resources i.e. skilled ... form. (iii) There is also a need for capital which is required to develop technology.

Mention the necessary conditions required by party to be recognized as a national party. -SST 10th

Description : Mention the necessary conditions required by party to be recognized as a national party. -SST 10th

Last Answer : Necessary conditions for national parties: (i) Secure at least 6% of total votes in Lok Sabha or Assembly elections in four states. (ii) Should win at least four seats in the Lok Sabha. (iii) They should have influence in more than three seats. Example: INC, BJP, CPI (M), CPI, NCP and BSP.

Mention the conditions necessary for the cultivation of sesame. -SST 10th

Description : Mention the conditions necessary for the cultivation of sesame. -SST 10th

Last Answer : Sesame thrives best in light and sandy soils, although some varieties grow well in black soil areas. It grows within 3 or 4 months.

What are the conditions necessary for the cultivation of rice? -SST 10th

Description : What are the conditions necessary for the cultivation of rice? -SST 10th

Last Answer : Rice needs a warm or humid climate. The areas having average temperatures of 22°C to 32°C are suitable for its cultivation. During the growing season, the temperature must be more than 25°C. The areas having heavy rainfall ranging from 150 to 300 cm are more suitable for its growth.

What geographical conditions are necessary for the growth of wheat? -SST 10th

Description : What geographical conditions are necessary for the growth of wheat? -SST 10th

Last Answer : Uttar Pradesh grows wheat well where the normal temperature is between 10°C to 15°C and the average rainfall ranges from 50 to 100 cm. Alluvial soil and level land is suitable for wheat cultivation. Warm and sunny weather are essential at the time of ripening.

What are the conditions necessary for growing millets? -SST 10th

Description : What are the conditions necessary for growing millets? -SST 10th

Last Answer : Millets are dry crops and they can thrive even in areas with an average rainfall of 50 to 120 cm and a normal temperature ranges between 27°C to 32°C. Even inferior alluvial soils prove ... Cultivation of millets is, therefore, more prevalent on the plateau region than on the northern plains.

What are the conditions necessary for growing jowar? -SST 10th

Description : What are the conditions necessary for growing jowar? -SST 10th

Last Answer : Jowar can be grown in different climate and soil conditions. Some varieties of jowar can be grown in three months only whereas others take as much as five months. The sowing is done by the broadcasting ... , the stalks are used as cattle-fodder and the grain is used as food mostly by the poor.

Mention the conditions necessary for growing sugarcane. -SST 10th

Description : Mention the conditions necessary for growing sugarcane. -SST 10th

Last Answer : Sugarcane is essentially a tropical plant. It thrives well where the summer temperatures are between 25°C to 30°C and the annual rainfall is between 100 to 150 cm. Plenty of water is needed during the time of growth. If rainfall is less, irrigation becomes essential.

Mention the conditions necessary for the growth of groundnut. -SST 10th

Description : Mention the conditions necessary for the growth of groundnut. -SST 10th

Last Answer : Groundnut thrives best in areas where the temperature ranges between 22°C to 28°C, and the rainfall is about 50 to 75 cm. Groundnut plants grow best in sandy soils. Warm coastal areas with high humidity are ideal places for its growth.

What are the geographical conditions necessary for the cultivation of groundnuts? -SST 10th

Description : What are the geographical conditions necessary for the cultivation of groundnuts? -SST 10th

Last Answer : Groundnuts require about 20°C to 25°C temp, and light to moderate rainfall of at least 40 cm. For groundnut red, yellow and black soil of the peninsular region is suitable. It is generally grown in dry and sub tropical climate.

Mention the conditions necessary for growing linseed and name the states where it is grown? -SST 10th

Description : Mention the conditions necessary for growing linseed and name the states where it is grown? -SST 10th

Last Answer : Linseed is a tropical plant, and it thrives where the temperature averages around 20°C. The annual rainfall between 45 cm to 75 cm is best suited for its cultivation. Linseed is sown ... -March. Linseed producing states are Madhya Pradesh, Uttar Pradesh, Maharashtra, Bihar, Rajasthan and Karnataka.

Mention the conditions necessary for the growth of cotton. -SST 10th

Description : Mention the conditions necessary for the growth of cotton. -SST 10th

Last Answer : Temperature: 20°C to 35°C. Rainfall: 80 cm to 120 cm. Soil: Black soil. Cotton is a tropical plant. In areas where the precipitation is insufficient, cotton can be grown with the help of irrigation. During the period of growth of the cotton plant, there should be abundant sunshine.

What are the conditions necessary for the growth of jute plant? -SST 10th

Description : What are the conditions necessary for the growth of jute plant? -SST 10th

Last Answer : Jute needs a hot and damp climate. It grows best in areas having a minimum temperature of 27°C during the period of growth. The rainfall should range between 170 cm to 250 cm annually. Plenty of water is also required for processing after harvesting the plant.

Mention the conditions necessary for the cultivation of rubber. -SST 10th

Description : Mention the conditions necessary for the cultivation of rubber. -SST 10th

Last Answer : Rubber needs a hot and wet climate, like that of equatorial areas. The temperature should be over 25°C and never below 21 °C. It needs heavy rainfall, ranging between 200 cm to ... well-distributed throughout the year. Rubber thrives in areas where variations in temperature and humidity are low.

Mention some conditions necessary for the growth of tea plant or India is the largest producer of tea. -SST 10th

Description : Mention some conditions necessary for the growth of tea plant or India is the largest producer of tea. -SST 10th

Last Answer : Tea grows well under light shade it is a shade loving plant. It needs temperature 24°C to 30°C (Under Shade). The tea plants grow well in humid climate and can not stand long spell of dry ... cm, but water should be well drained. Water logging and frost conditions are injurious for the tea plant.

What are the conditions necessary for the growth of coffee plant? -SST 10th

Description : What are the conditions necessary for the growth of coffee plant? -SST 10th

Last Answer : The coffee plant thrives in a hot and humid climate, with temperatures ranging from 18°C to 28°C. The plant also requires 125 to 200 cm of annual rainfall which should be well distributed throughout the year.

What are the necessary conditions for autotrophic nutrition and what are its byproducts? -Biology

Description : What are the necessary conditions for autotrophic nutrition and what are its byproducts? -Biology

Last Answer : Carbon and energy requirements of the autotrophic organism are fulfilled by photosynthesis. It is the process by which autotrophs take in substances from the outside and convert them into stored forms of energy ... serves as the internal energy reserve to be used as and when required by the plant.

What are the necessary conditions (or autotrophic nutrition and what are its by-products ? -Biology

Description : What are the necessary conditions (or autotrophic nutrition and what are its by-products ? -Biology

Last Answer : Necessary conditions for autotrophic nutrition : (i) Presence of chlorophyll in the living cells. (if) Provision of supply of water to green plants or cells of the plant. (iii) Sufficient sunlight. (iv) Sufficient supply of carbon dioxide. By-product of auto tropic nutrition is oxygen.

Write two conditions that are necessary for conduction of heat. -Science-7

Description : Write two conditions that are necessary for conduction of heat. -Science-7

Last Answer : (i) The two objects should be in direct contact with each other. (ii) The temperature of the two objects should be different. Heat will flow only from a hotter object to a cooler object.

What Conditions necessary for a measure of variation to have a positive value?

Description : What Conditions necessary for a measure of variation to have a positive value?

Last Answer : It is that the measure is somehow related to the absolute valueof the observations compared to some fixed value and also thatthere IS some variation.

What two conditions are necessary for clouds to form?

Description : What two conditions are necessary for clouds to form?

Last Answer : Need answer

Under which of the listed conditions can the engine room retake the throttle control from the bridge? A. Any time it is deemed necessary. B. Only with the master's permission. C. After a 10 minute delay to the input command. D. Only after the throttle has been placed in stop.

Description : Under which of the listed conditions can the engine room retake the throttle control from the bridge? A. Any time it is deemed necessary. B. Only with the master's permission. C. After a 10 minute delay to the input command. D. Only after the throttle has been placed in stop.

Last Answer : Answer: A

What are the necessary conditions for any system to be aromatic?

Description : What are the necessary conditions for any system to be aromatic?

Last Answer : Ans. A compound is said to be aromatic if it satisfies the following three conditions: (i) It should have a planar structure. (ii) The π-electrons of the compound are completely delocalized in the ring. (iii)The total number ... to (4n + 2), where n = 0, 1, 2 etc. This is known as Huckel s rule.

What conditions are necessary for germination of seeds?

Description : What conditions are necessary for germination of seeds?

Last Answer : Seeds need sufficient food for germination, which they get from cotyledons. Following environmental conditions are necessary for seed germination: - Moisture or Water: - i) Seed absorb water and swell ... C. ii) This range of temperature of very necessary for the enzymes to function.