Why is air compressed in a diesel engine?

Why is air compressed in a diesel engine?
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1 Answer

Answer :

In a diesel engine, filtered air enters the cylinder and gets compressed to generate

enough heat to ignite the diesel.
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Related questions

In diesel engine the fuel injected would burn instantaneously at about compressed air temperature of A. 1000°C B. 250°C C. 450°C D. 2000°C

Description : In diesel engine the fuel injected would burn instantaneously at about compressed air temperature of A. 1000°C B. 250°C C. 450°C D. 2000°C

Last Answer : ANSWER : A

Which of the following is compressed in a diesel engine cylinder A. air B. fuel C. air and fuel D. air and lub oil

Description : Which of the following is compressed in a diesel engine cylinder A. air B. fuel C. air and fuel D. air and lub oil

Last Answer : ANSWER : A

Which of the following medium is compressed in a diesel engine cylinder? a. air b. air and fuel c. air and lubricating oil d. fuel

Description : Which of the following medium is compressed in a diesel engine cylinder? a. air b. air and fuel c. air and lubricating oil d. fuel

Last Answer : ANSWER a. air

Steps taken by the Government of India to control air pollution include (a) compulsory PUC (Pollution under control) certification of petrol driven vehicles which tests for carbon monoxide and hydrocarbons (b) permission to use only pure diesel with a maximum of 500 ppm sulphur as fuel for vehicles (c) use of non-polluting compressed natural gas (CNG) only as fuel by all buses and trucks (d) compulsory mixing of 20% ethyl alcohol with petrol and 20% biodiesel with diesel.

Description : Steps taken by the Government of India to control air pollution include (a) compulsory PUC (Pollution under control) certification of petrol driven vehicles which tests for carbon monoxide and ... trucks (d) compulsory mixing of 20% ethyl alcohol with petrol and 20% biodiesel with diesel.

Last Answer : (a) compulsory PUC (Pollution under control) certification of petrol driven vehicles which tests for carbon monoxide and hydrocarbons

The compression of air in a diesel engine is

Description : The compression of air in a diesel engine is

Last Answer : 4:1 to 25:1.

In a naturally aspirated diesel engine, the air is supplied by a A. supercharger B. centrifugal pump C. movement of engine piston D. reciprocating pump

Description : In a naturally aspirated diesel engine, the air is supplied by a A. supercharger B. centrifugal pump C. movement of engine piston D. reciprocating pump

Last Answer : ANSWER : C

The output of a diesel engine can be increased without increasing the engine speed or size in the following way A. feeding more fuel B. increasing the flywheel size C. heating intake air D. supercharging

Description : The output of a diesel engine can be increased without increasing the engine speed or size in the following way A. feeding more fuel B. increasing the flywheel size C. heating intake air D. supercharging

Last Answer : ANSWER : D

If the performance of diesel engine of different sizes, cylinder dimensions and power rating are to be compared, which of the following parameters can be used for such comparison? (a) Swept volume (b) Air fuel ratio (c) Specific brake fuel consumption (d) Volumetric efficiency

Description : If the performance of diesel engine of different sizes, cylinder dimensions and power rating are to be compared, which of the following parameters can be used for such comparison? (a) Swept volume (b) Air fuel ratio (c) Specific brake fuel consumption (d) Volumetric efficiency

Last Answer : Ans :c

In a 4 S diesel engine, the term ‘squish’ refers to the (a) Injection of fuel in the precombustion chamber (b) Discharge of gases from the precombustion chamber (c) Entry of air into the combustion chamber (d) Stripping of fuel from the core

Description : In a 4 S diesel engine, the term ‘squish’ refers to the (a) Injection of fuel in the precombustion chamber (b) Discharge of gases from the precombustion chamber (c) Entry of air into the combustion chamber (d) Stripping of fuel from the core

Last Answer : Ans :c

Keeping other parameters constant brake power of diesel engine can be increased by (a) Decreasing the density of intake air (b) Increasing the temperature of intake air (c) Increasing the pressure of intake air (d) Decreasing the pressure of intake air

Description : Keeping other parameters constant brake power of diesel engine can be increased by (a) Decreasing the density of intake air (b) Increasing the temperature of intake air (c) Increasing the pressure of intake air (d) Decreasing the pressure of intake air

Last Answer : Ans : c

Mixing of air and fuel in the diesel engine occurs in a. injection pump b. carburetor c. engine cylinder d. inlet manifold

Description : Mixing of air and fuel in the diesel engine occurs in a. injection pump b. carburetor c. engine cylinder d. inlet manifold

Last Answer : ANSWER c. engine cylinder

A diesel engine is usually more efficient than a spark ignition engine because a. Diesel being a heavier hydrocarbon, release more heat per kg than gasoline b. The air standard efficiency of diesel cycle is higher than the Otto cycle, at a fixed compression ratio c. The compression ratio of a diesel engine is higher than that of an Spark ignition engine d.Self ignition temperature of diesel is higher than that of gasoline.

Description : A diesel engine is usually more efficient than a spark ignition engine because a. Diesel being a heavier hydrocarbon, release more heat per kg than gasoline b. The air standard efficiency of diesel ... an Spark ignition engine d.Self ignition temperature of diesel is higher than that of gasoline.

Last Answer : ANSWER c. The compression ratio of a diesel engine is higher than that of an S.I engine

Scavenging air in diesel engine means a. air used for combustion under pressure b. forced air for cooling the cylinder c. burnt air containing products of combustion d. air used for forcing burnt gases out of the engines cylinder during the exhaust stroke

Description : Scavenging air in diesel engine means a. air used for combustion under pressure b. forced air for cooling the cylinder c. burnt air containing products of combustion d. air used for forcing burnt gases out of the engines cylinder during the exhaust stroke

Last Answer : ANSWER d. air used for forcing burnt gases out of the engines cylinder during the exhaust stroke

In diesel engine, the fuel is ignited by a. spark b. injected fuel c. heat resulting from compressing air that is supplied for combustion d. ignitor

Description : In diesel engine, the fuel is ignited by a. spark b. injected fuel c. heat resulting from compressing air that is supplied for combustion d. ignitor

Last Answer : ANSWER c. heat resulting from compressing air that is supplied for combustion

In a diesel engine the high temperature needed to ignite the fuel is achieved by – (1) using heat from exhaust (2) the battery (3) compressing air in the cylinders (4) an electrical spark

Description : In a diesel engine the high temperature needed to ignite the fuel is achieved by – (1) using heat from exhaust (2) the battery (3) compressing air in the cylinders (4) an electrical spark

Last Answer : (3) compressing air in the cylinders Explanation: Diesel engines use the heat of compressed air to ignite the fuel (intakes air, compresses it, then injects fuel). Diesel engines need high compression ratios to generate the high temperatures required for fuel auto ignition.

What are the uses of air filter and superchargers in diesel engine power plant?

Description : What are the uses of air filter and superchargers in diesel engine power plant?

Last Answer : The purpose of air filter is to filter the air from dust and other suspended particles. The purpose of super charger is to increase the pressure of the engine to increase power of the engine.

What Are The Uses Of Air Filter And Superchargers In Diesel Engine Power Plant?

Description : What Are The Uses Of Air Filter And Superchargers In Diesel Engine Power Plant?

Last Answer : The purpose of air filter is to filter the air from dust and other suspended particles. The purpose of super charger is to increase the pressure of the engine to increase power of the engine.

In a diesel engine the high temperature needed to ignite the fuel is achieved by (1) using heat from exhaust (2) the battery (3) compressing air in the cylinders (4) an electrical spark

Description : In a diesel engine the high temperature needed to ignite the fuel is achieved by (1) using heat from exhaust (2) the battery (3) compressing air in the cylinders (4) an electrical spark

Last Answer : compressing air in the cylinders

State the functions of following elements: i) Diesel engine system ii) Air intake system iii) Engine exhaust system iv) Engine starting system.

Description : State the functions of following elements: i) Diesel engine system ii) Air intake system iii) Engine exhaust system iv) Engine starting system.

Last Answer : i) Diesel engine system:-  Four strokes Two strokes ii) Air intake system:- Air intake system is provided to supply air to engine cylinder for fuel combustion.  iii) Engine exhaust system ... provided to rotate the engine initially until the firing starts and engine run under its own power. 

When an electric bulb breaks, there is a mild bang due to (a) the chemical reaction between the enclosed gases (b) the compressed gases rushing out suddenly (c) the air rushing in to fill the evacuated space (d) some other unknown reason

Description : When an electric bulb breaks, there is a mild bang due to (a) the chemical reaction between the enclosed gases (b) the compressed gases rushing out suddenly (c) the air rushing in to fill the evacuated space (d) some other unknown reason

Last Answer : Ans:(c)

How to calculate the volume of air in a compressed container?

Description : How to calculate the volume of air in a compressed container?

Last Answer : answer:This is one of the handiest rules of thumb to know.: 22.4 liters of gas at STP (Standand Temperature and Pressure weighs it's molecular weight in grams. For example 22.4 liters of Oxygen weighs 32 grams 22.4 ... it 400 grams of (assume) propane C3H8 ( MW 44) is 22.4 x 400/44 = ~200 liters.

When using a spray can of compressed air/gas to clean your PC is it harmful to your computer when it comes out liquid when spraying?

Description : When using a spray can of compressed air/gas to clean your PC is it harmful to your computer when it comes out liquid when spraying?

Last Answer : answer:Not really, Just don't hold the can upside down or sideways if you can help it. There is a chance that it can discolor some plastics but otherwise don't worry about it. Duster is ... that is very unlikely. During gaming spec competitions they use liquid nitrogen as a CPU and GPU heatsink.

Can I use a can of compressed air to rid my Xbox 360 of overheating problems?

Description : Can I use a can of compressed air to rid my Xbox 360 of overheating problems?

Last Answer : answer:First off, have you called Microsoft? I've had friends get their boxes replaced. Its worth a shot. The best way would be to take it apart. That's really the only way you will get all ... out. Trying to blow it out with compressed air would just succeed in burying whatever is in there deeper.

Why does my motorcycle sound different (almost like a loud fan or compressed air)

Description : Why does my motorcycle sound different (almost like a loud fan or compressed air)

Last Answer : answer:A hissing sound would usually point to a vacuum leak. Vacuum leaks often happen when rubber hoses wear out and crack, or even gaskets for the air intake or manifold start to wear out and weaken. ... leak at the mating flange. Do you smell anything off about the bike when it's running?

Why do compressed air cans get cold?

Description : Why do compressed air cans get cold?

Last Answer : answer:This happens due to the physical characteristics of the can and the liquid inside. Compressed air is actually maintained under pressure primarily in the form of a liquid. However, there ... aware of the physical chemistry involved, but figured a simplified explanation would be more suitable.

What term describes a tool that is powered by compressed air?

Description : What term describes a tool that is powered by compressed air?

Last Answer : Feel Free to Answer

What industries use compressed air systems?

Description : What industries use compressed air systems?

Last Answer : There are several industries that used compressed air systems. Dentistry field uses dental air compressors.

Is there something besides compressed air to clean my Xbox Console?

Description : Is there something besides compressed air to clean my Xbox Console?

Last Answer : Aside from compressed air, a damp microfiber cloth with just plain tap water or a very mild cleaning solution of vinegar and water or rubbing alcohol and water is all that is recommended when ... and clean internal parts and moisture must be kept away from all metal connectors and power supplies.

Who sells the cheapest compressed air?

Description : Who sells the cheapest compressed air?

Last Answer : You can buy compressed air in a lot of places. Be it in stores or on the internet. You can buy compressed air quite cheap from many places, so look around and find what deals you like and see which you can get cheapest.

Who sells compressed air tanks?

Description : Who sells compressed air tanks?

Last Answer : There are a lot of good sites for co2 tanks. One that I prefer is DicksSportingGoods.com they have a lot to choose from in many different sizes. They also have many other things besides co2 tanks.

Which of the following procedures should be used to maintain a large electric motor during periods of inactivity? A. A thin layer of air-drying varnish should be applied on the windings. B. Compressed air should be blown over areas where dust is deposited. C. Spraying a solvent periodically to remove carbon dust. D. Space heaters should be used to prevent condensation of moisture.

Description : Which of the following procedures should be used to maintain a large electric motor during periods of inactivity? A. A thin layer of air-drying varnish should be applied on the windings. B. ... periodically to remove carbon dust. D. Space heaters should be used to prevent condensation of moisture.

Last Answer : Answer: D

If a small electric motor has been submerged in saltwater for a short period of time, you should _____________. A. send it ashore for rewinding B. rinse it with warm freshwater and bake it dry in an oven C. soak it in a bucket of commercial solvent and bake with internal heat D. clean it with carbon tetrachloride and blow it out with compressed air

Description : If a small electric motor has been submerged in saltwater for a short period of time, you should _____________. A. send it ashore for rewinding B. rinse it with warm freshwater and bake it dry ... and bake with internal heat D. clean it with carbon tetrachloride and blow it out with compressed air

Last Answer : Answer: B

Compressed air should not be used to clean motor controller equipment because ________________. A. it may force metallic particles into coil insulation B. the surrounding area may need additional cleaning C. the air blast dries out insulation quickly D. a mask and respirator would be required

Description : Compressed air should not be used to clean motor controller equipment because ________________. A. it may force metallic particles into coil insulation B. the surrounding area may need additional cleaning C. the air blast dries out insulation quickly D. a mask and respirator would be required

Last Answer : Answer: A

Controller contacts should be routinely cleaned by ________. A. blowing with compressed air B. filing with a bastard file C. wiping with a clean dry cloth D. dressing with crocus cloth

Description : Controller contacts should be routinely cleaned by ________. A. blowing with compressed air B. filing with a bastard file C. wiping with a clean dry cloth D. dressing with crocus cloth

Last Answer : Answer: C

Grease coatings on electrical contact surfaces increase contact resistance and should be removed with a/an _______________. A. small wire brush B. compressed air jet C. clean dry cloth D. 10% solution carbon solvent and water

Description : Grease coatings on electrical contact surfaces increase contact resistance and should be removed with a/an _______________. A. small wire brush B. compressed air jet C. clean dry cloth D. 10% solution carbon solvent and water

Last Answer : Answer: C

Which of the following statements is true concerning the cleaning of electrical contacts? A. Compressed air should be used to blow out metallic dust. B. Magnetic brushes should be used to remove metallic dust. C. The contact surfaces should be greased to increase contact resistance. D. Delicate parts should be cleaned with a brush and an approved safety solvent.

Description : Which of the following statements is true concerning the cleaning of electrical contacts? A. Compressed air should be used to blow out metallic dust. B. Magnetic brushes should be used to remove ... contact resistance. D. Delicate parts should be cleaned with a brush and an approved safety solvent.

Last Answer : Answer: D

Which of the listed precautions should be taken when cleaning the internals of a motor with compressed air? A. Open the machine on both ends so as to allow the air and dust to escape. B. Be certain that the circuit breaker is opened and tagged on the feeder panel. C. Be certain that the air is clean and as dry as possible. D. All of the above.

Description : Which of the listed precautions should be taken when cleaning the internals of a motor with compressed air? A. Open the machine on both ends so as to allow the air and dust to escape. B. Be certain that the ... panel. C. Be certain that the air is clean and as dry as possible. D. All of the above.

Last Answer : Answer: D

To repair a small electrical motor that has been submerged in saltwater, you should _____________. A. wash it with fresh water and apply an external source of heat B. renew the windings C. send it ashore to an approved service facility D. rinse all electrical parts with a carbon tetrachloride cleaning solvent and then blow dry the motor with compressed air

Description : To repair a small electrical motor that has been submerged in saltwater, you should _____________. A. wash it with fresh water and apply an external source of heat B. renew the windings ... electrical parts with a carbon tetrachloride cleaning solvent and then blow dry the motor with compressed air

Last Answer : Answer: A

Which of the following represents the accepted method of cleaning dust and foreign particles from electrical equipment while limiting damage to electric components? A. Carefully wiping off the components with a soft cotton rag. B. Blowing a high velocity stream of compressed air rapidly across the components. C. Using a vacuum cleaner to remove debris from the components. D. Using carbon tetrachloride as a cleaning solvent to clean the components.

Description : Which of the following represents the accepted method of cleaning dust and foreign particles from electrical equipment while limiting damage to electric components? A. Carefully wiping off the components ... the components. D. Using carbon tetrachloride as a cleaning solvent to clean the components.

Last Answer : Answer: C

In most of the vacuum crystalliser, vacuum is generally produced by means of a (A) Suction pump (B) Compressed air jet (C) Steam jet ejector with a barometric condenser (D) None of these

Description : In most of the vacuum crystalliser, vacuum is generally produced by means of a (A) Suction pump (B) Compressed air jet (C) Steam jet ejector with a barometric condenser (D) None of these

Last Answer : (C) Steam jet ejector with a barometric condenser

What is the purpose of compressed air in SF6 breaker?

Description : What is the purpose of compressed air in SF6 breaker?

Last Answer : This used for drive for opening and closing of the contacts. (Arc quenching is taken care by SF6 gas) 

Purpose of air lift pump is to (A) Compress air (B) Lift compressed air (C) Lift water from a well by using compressed air (D) Lift air under negative pressure

Description : Purpose of air lift pump is to (A) Compress air (B) Lift compressed air (C) Lift water from a well by using compressed air (D) Lift air under negative pressure

Last Answer : (C) Lift water from a well by using compressed air

Air vessel of a reciprocating pump is initially filled with (A) Atmospheric air (B) Compressed air (C) Water (D) None of these

Description : Air vessel of a reciprocating pump is initially filled with (A) Atmospheric air (B) Compressed air (C) Water (D) None of these

Last Answer : (B) Compressed air

Give six application of compressed air.

Description : Give six application of compressed air.

Last Answer : I. Automobile tyres are inflated with compressed air for smooth running of vehicles. II. Spray guns use compressed air for spraying paint. III. Air powered motors use compressed air to work. IV. Pneumatics V. Brake systems VI. Most of dentistry tools use compressed air for their working.

'Utilities' in a chemical process plant includes compressed air, steam, water, electrical power, oxygen, acetylene, fuel gases etc. Utility costs for ordinary chemical process plants ranges roughly from __________ percent of the total product cost. (A) 1 to 5 (B) 10 to 20 (C) 25 to 35 (D) 35 to 45

Description : 'Utilities' in a chemical process plant includes compressed air, steam, water, electrical power, oxygen, acetylene, fuel gases etc. Utility costs for ordinary chemical process plants ranges roughly from __________ percent of the total product ... 1 to 5 (B) 10 to 20 (C) 25 to 35 (D) 35 to 45

Last Answer : (B) 10 to 20

Compressed dry air is used as the cutting fluid, while machining (A) Steel (B) Cast iron (C) Aluminium (D) None of these

Description : Compressed dry air is used as the cutting fluid, while machining (A) Steel (B) Cast iron (C) Aluminium (D) None of these

Last Answer : Option B

The compaction of concrete in the drilled pile hole is done by compressed air in the case of (A) Simplex pile (B) Franki pile (C) Pressure pile (D) Vibro pile

Description : The compaction of concrete in the drilled pile hole is done by compressed air in the case of (A) Simplex pile (B) Franki pile (C) Pressure pile (D) Vibro pile

Last Answer : Answer: Option C

Compressed air coming out from a punctured football  (a) becomes hotter  (b) becomes cooler1  (c) remains at the same temperature  (d) may become hotter or cooler depend-ing upon the humidity of the surround¬ing air  (e) attains atmospheric temperature.

Description : Compressed air coming out from a punctured football  (a) becomes hotter  (b) becomes cooler1  (c) remains at the same temperature  (d) may become hotter or cooler depend-ing upon the humidity of the surround¬ing air  (e) attains atmospheric temperature.

Last Answer : (b) becomes cooler1

The purpose of an accumulator is to: a. Relieve excess pressure b. Store fluid under pressure c. Store compressed gas for tyre inflation d. Remove air from the system

Description : The purpose of an accumulator is to: a. Relieve excess pressure b. Store fluid under pressure c. Store compressed gas for tyre inflation d. Remove air from the system

Last Answer : b. Store fluid under pressure

What industries require filtered compressed air?

Description : What industries require filtered compressed air?

Last Answer : Almost every chemical process, power plant food processing etc. plant has some type of air-operated device… from control valves to air operated pumps… and all have an air compressor delivering filtered air.