A GOOD LESSON BY ER. MOSES

       Looking at a student who was writing '1000' on the blackboard and constantly stumbling into his classroom, his math teacher said, "How much is this?" He asked. Though confident, feeling a little embarrassed at the simplicity of the question, he replied, "thousand" Now the teacher wrote an additional zero to the right of the number, '10000' and asked him again how much it was. "Ten thousand," was the immediate answer. Now write another zero to the left of the number '010000' and ask how much it is. "The same ten thousand," he replied.

As the teacher smiles at him, "When an unimportant number follows an important me, its value increases. When the former tries to reach that important number, it has no value. It is the relationship between teacher and student. A student follows his teacher." If you go, he'll get his value.

List of Top Free Online Courses in 2020 with Free Certificates

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Group 4 result check it now

Tamil Nadu Public Services Commission (TNPSC) conducts the combined civil services examination - 4 (Group-IV )was conducted dated on 1-9-2019  and the result was published to evening  below link is direct link you can check your link without any traffic all the best fnds







http://www.tnpsc.gov.in/Resultget-CCSE_IV_2K19.


htmlhttp://www.tnpsc.gov.in/Resultget-CCSE_IV_2K19.html

Technical world 

Mother is the super power

"Mother" is not just a word.

Everything we have learned in this world is from our mother
When I speak to her, she teaches to speak, only in poverty and in the way of integrity.

Anger of the evil demon, the absence of God's noble creative mother only such quality anywhere else in the annals view available priceless life lesson Mother only in the form that we learn, we are able, atomic than the excess energy is Mother's loving policy of the tower's beauty enjoys world, Enoch foundation of the sacrifice do not know Yes we have a tower height to reach the Nama My mother not only withstand the foundation.
Even though you are like a ghost, we can use our body, material and spirit

The only reason anyone in this world who has struggled with the sixth sense is the seventh sense is that he will take medication even before we feel pain in our body.

There is no obedience to slavery from an early age, it is only Mother who sows within us the human dignity.
Edison's declaration of foolishness in the eyes of the world made the world wonder

Mariappan was the only asset of the Paralympics to win gold in the excluded community

She is a mother
She is the only one who can carry the burden of life on her head to carry the crown load on our heads

Only the world-renowned editor, who knew the author,
There are students who have lost their education but there is no one who is affectionate
Mother only has the power to turn grievances into subjectivities. Therefore, I conclude my speech by saying that the head of our life is the best teacher and mother.
Thank you and good bye

Spark Plug in IC Engines

Spark Plug in IC Engines

A spark plug in IC engines is a device used to produce spark for igniting the charge of petrol engines. It is always screwed into the cylinder head. It is, usually, designed to withstand a pressure upto 35 bar and operate under a current of 10 000 to 30 000 volts. The spark plug gap is kept from 0.3 mm to 0.7 mm.

Super chargers by prof moses dhilipkumar

    Super chargers

Super charger acts as an air compressor. It is used to increase the density and pressure of the air that is supplied to the internal combustion engine. In the engine, during the intake of the cycle it takes more oxygen and burn more fuel to accomplish the work. This is due the power increase.

By using the belts, gears, shafts, chains all of these are connected to the engines crank shaft to produce super charge.

We can see two types of the super chargers. To that matter after super charging, the air enters into the engine. After compression the pressure in the air is compressed and it super charges the system by 1.5 to 2 times to increase the entry of the pressure.

In one type of the super charger the engine shaft is mechanically linked to the shaft. The shaft energy must turn into useful work input for the super charger.

In another type of the super charger the compressor is attached to the turbine. Exhaust gas must be allowed to enter into the turbine. The turbine drives the super charger; this type of super charger is known as the turbo 

Super charger drive types:

They are divided into mechanical, exhaust gas turbine and other types:

Mechanical drives are divided into four types they are belt drive, chain drive, direct drive and gear drive.

Exhaust gas turbines are divided into two types they are radial turbine and axial turbine.

And the other type of the drives is electrical motor and auxiliary power unit.

Advantages of supercharger:

• The work output and the overall efficiency of the engine must be increased by 50% of the supercharger.
• At the higher heights, the low density air is converted into the normal density air.
• In the supercharge engine the specific fuel consumption is saved
• In the volumetric efficiency of the super charger engine will be higher
• To run the super charger, exhaust gas must be re-circulated in the engine. In this case the work input will be increases.
• In the super charged engine the scavenging is improved.

Disadvantages of supercharger:

• On the engine, different moving parts are observed like the thermal stress, mainly on the bearing of the engine shafts.
• So it results in the wear and tear in the moving parts
• We need to replace the parts frequently in the engine
• During the time of compression stroked by the piston there is a leakage of the air in the super charge engine
• Due to the super charging, the temperature of the air entering the engine cylinder will be higher.
• The detonation tendency of the engine increases.
• In the petrol engine, the detonation reduces so inter coolers are used to increases the size of the engine.

Hydraulic Turbines by proff moses dhilipkumar

Hydraulic Turbines

hydraulic turbine is a machine which converts the hydraulic energy into mechanical energy. The hydraulic turbines are also known as water turbines. Following two types of hydraulic turbines are important.

1.     Impulse turbine

2.     Reaction turbine

In an impulse turbine, the total energy at the inlet of a turbine is only kinetic energy. The pressure of water both at entering and leaving the vanes is atmospheric. It is used for high head of water. A Pelton wheel is a tangential flow impulse turbine.

In a reaction turbine, the total energy at the inlet of a turbine is kinetic energy as well as pressure energy. It is used for low head of water. The Francis and Kaplan turbines are inward flow and axial flow reaction turbines respectively.