Smart Mechanicals

KNOW WHY AUTOMATIC TRANSMISSION VEHICLE GIVES LESS MILAGE THEN MANUAL TRANSMISSION VEHICLE !! You might have wondered why 100cc scooter gives less mileage than 100cc manual transmission bike. Think about it where a 100cc scooter returns mileage near 40-50 Kmpl, an average 100cc motorcycle provides mileage over 60 Kmpl. The answer to this question lies in the transmission used where the scooters use automatic CVT transmission, while motorcycles use a proper 4 or 5 speed manual transmission.We will discuss about the reason behind this in this article. Lets start with the purpose of a gearbox. The engine of a vehicle runs at a certain rotary speed or revolutions per minute ( RPM ). The required speed of revolution of the wheels is usually much less than that. For example, a typical 100cc bike engine can rev upto 6000rpm, but if the wheels ( 18 inch dia ) of a typical 100cc bike move at that speed, it would reach a velocity of 518 kmph! So basically the gearbox is the intermed

RELATION BETWEEN TORQUE & HORSEPOWER EXPLAINED !! Horsepower and torque are very useful when you buy a vehicle of a rotary machine. Before discussing on this topic, first you should learn about the meaning of torque, horsepower and RPM.  What are Torque, RPM and Horsepower? Torque: Torque is measure of rotary force. It is works as force works in linear motion. When a torque is applied on a shaft it rotates or tends to rotate if the torque is not sufficient. In simple words, the rotary force applied on a shaft to rotate it is known as torque.  In mathematically torque is the product of tangential force applied on a shaft and the radius of shaft. The SI unit of torque is N-m (Newton meter).  RPM: RPM is the unit or measure of speed in rotary motion. The rpm is stand for rotation per minute. If a shaft rotate 50 cycle per minute mean it has 50 rpm speed. Larger rpm means larger speed.  Horsepower: Horsepower is the unit or measure of power. Powe

Tractor rear wheels are wide because of multiples reasons Tractors is basically an off-road vehicle which don't have to carry passenger on road. Tractor run in farms in soft soil and mud also so it must have better traction between tyre and road surface. Tractor rear tyres are used to pull heavy load not only to push tractor farward. While doing agriculture work tractor require lot of traction force which is provided by wide surface of wheel and grips on wheel surface. Wide tyres also maintain the Center Of Gravity of the tractor. Tractors are not designed to run fastly instead of it is design to run slowly but to provide high torque. And now, it's not true that all tractors are provided with big rear tyres. Only 2WD tractors are provided with big rear wheels (in 4WD all wheels are of same size ) because of following reasons. As in 2WD tractor only rear wheels are available for traction purpose and we know  F = AC + W tan($) where W = weight on wheel       

Reasons for using Stones in Switchboard Yard / Substation : Power Transformers installed in the substations will have oil as cooling and insulating medium.Oil leakage takes place during operation or when changing the oil in the transformer. ... So Stones is provided to protect from fire when oil spillage takes place. View of Technical :  1.To avoid rain water to stand on ground, to prevent the growth of grasses & plants,growth of plants & grass near the yard cause will create the short circuit . 2.The most important point to avoid step potential and touch potential to rise.where step potential is potential between human body & touch is potential between human body & equipments.  3. keep the moisture always bottom  of the stone to reduce the earth  resistance

Two-stroke engines produce a lot of pollution because the fuel air mixture in them gets contaminated with the engine’s lubricating oils. Simultaneously the combustion chamber draws in the contaminated mixture as exhaust gases are expelled through an exhaust port. Some of the fuel and oil gets mixed with the exhaust resulting in a single engine is contributing towards pollution greater than a four stroke engines. two-stroke engines, unlike four strokes, don’ t have a system of valves that open and close in the exact moment, they have a set of intake and exhaust ports that are far less efficient. This leads to fresh mixture escaping (to an extent) thru the exhaust ports, which leads to more contamination. On top of that, you have oil in the mix, which makes things even worse.

The greater the resistance to change, the greater is the elasticity of the material and the faster it comes back to its original shape or configuration when the deforming force is removed. If this definition is followed then definitely steel will win the race of elasticity. A rubber band is not really very ‘elastic’. It is merely more stretchable. It cannot retain this property of regaining its original shape over the same range of force that a steel wire can. It merely stretches more than the steel wire. It is therefore not more elastic. It is merely more deformable. Let’s consider an example: The same pull exerted on a rubber band will stretch it more than it stretches a steel wire, where the stretching will be practically imperceptible. But the steel wire will remain stretchable for a much higher force. A rubber band will stretch easily for a small force that you apply with your fingers. But if you pull more and more, it simply snaps. But the steel wire will be s

What is an I-beam? An I-beam, also known as H-beam, W-beam (for "wide flange"), Universal Beam (UB), Rolled Steel Joist (RSJ), or double-T (especially in Polish, Bulgarian, Spanish, Italian and German), is a beam with an I or H-shaped cross-section. The horizontal elements of the "I" are known as flanges, while the vertical element is termed the web. I-beams are usually made of structural steel and are used in construction and civil engineering. Why do we use I Beam, instead of rectangular beam? On the left side we have a simple rectangular beam, whereas on the left hand side on the above image, we have an I section beam. The question that is most commonly asked as to why do I section beam most frequently used in construction as compared to simple rectangular beam. And also why only I beam is used and not a beam of any other shape. When a beam is subjected to stresses, the outer layer is compressed, with the inner one undergo tension. The m

Buffing : An Ideal Car Finishing Process Buffing is a polishing operation in which the work piece is brought in contact with a revolving cloth buffing wheel, which is charged with fine abrasive particles like aluminum oxide or silicon carbide. The cloth work as transporting medium for fine abrasive particle and the metal removed during rubbing action between work piece and buffing wheel. This metal removal process removes scratch or other suspended marks from the metal body and provides a mirror like surface finish. Buffing : An Ideal Process for Car Finishing Mostly buffing wheel is made by linen, cotton, broad cloth and canvass. This wheel made by multiple layers of these cloths overlapped on each other. The wheel rotates during buffing operation at a speed of 32.5 -40 m/s and a small pressure applied on the wheel which promote abrasive action and removes metal in form of microchips. Buffing is mostly used to remove only fine scratches or to remove oxide or similar

Heat is transferred between a system and its environment when their temperature differs. Energy is transferred by thermal conduction. Metal is good conductor of heat. When you touch the metal ice tray, heat will transfer from your finger to the bit of ice and the ice melts results a thin film of water between the finger and the metal tray. Again the water film will freeze because the metal tray is so cold. Thus an icy bond will create in between the metal tray and your finger. That is why your finger sticks to a metal ice tray just taken from your refrigerator.