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What is page margin?
The area of blank space around the rim of the paper. If the writing/typing on a page goes all the way to the very edge of the page, then it has no margin.
What is a hub and spoke system?
"Hub and spoke" is a term in air transportation to describe a common method for an airline to organize their flights. Airlines will have hubs in a few cities where most of their flights will originate, with spokes out to non-hub cities. Much like the hub and spokes of a bicycle tire. When flying from one city to another, you will typically have a connecting flight through one of the airline's hubs. This system can also be implemented with other forms of mass transit, and cargo transportation.
What is difference between Thermo Mechanically Treated bars and Cold Twisted bars?
COLD TWISTED BARS: The Cold Twisted Deformed Bars (CTD Bars) and the Thermo Mechanically Treated Bars (TMT Bars) are rolled in the same process i.e. hot rolling in a temperature of 1200oC to 1000oC drop. CTD Bar is entered into cooling bed from the final pass (roll) then kept for natural cooling and being twisted in the room temperature. The bar is stretched to some extent during twisting by which, the inside grains are in crystle forms, are crushed and thereby, the bars attains the required strength TATA TISCON rebars are 'hot rolled' from steel billet and subjected to PLC controlled on line thermo - mechanical treatment in three successive stages: (a) Quenching - The hot rolled bar leaving the final mill stand is rapidly quenched by a special water spry system. This hardens the surface of the bar to a depth optimised for each section through formation of martensitic rim while the core remains hot and austenitic. (b) Self Tempering - When the bar leaves the quenching box, the core remains hot compared to the surface allowing heat to flow from to the surface causing tempering the outer martensitic layer into a structure called Tempered Martensite. The core still remains austenitic at the stage. (c) Atomospheric Cooling - This takes place on the cooling bed where austenitic core transformed into ductile ferrite pearlite structure. Thus the final structure consists of an optimum combination of strong outer layer (tempered martensite) with ductile core (ferrite pearlite). This gives TATA TISCON its unique combination of higher strength and ductility.
Can we use 225 60 R17 instead of 225 65 R17?
You can but shouldn't. If you chose to do so, you would decrease the circumference of the wheel and therefore your top speed will be lower, but acceleration a bit higher. Your speedo will also read wrongly, but not by much, and it will overstate the speed. The real answer to this question comes from an understanding of what all the numbers mean. The 225 is the width of the tyre in mm. The 60 and 65 are the profile of the tyre, or the ratio of height / width. So, the height of the 60 tyre is 60% of the width, and the height of the 65 tyre is 65% of the width. The R means that its a steel radial tyre. The 17 means that it fits a 17 inch rim. The overall diameter of the 225/60R17 wheel and tyre combination will be 17 inches (431.8mm) plus 2 times 225 * 0.60 = 431.8 + 270 = 701.8 mm The overall diameter of the 225/65/R17 wheel and tyre combination will be 17 inches (431.8mm) plus 2 times 225 * 0.65 = 431.8 + 292.5 = 724.3 mm So, the answer in the first paragraph is correct. The explanation above is why. Only one more thing to add to the first paragraph. Using the 60 tyres instead of the 65 tyres will give you better braking performance. Or, in other words, your brakes will not have to work as hard to stop the vehicle, but you might be more likely to lock up the brakes, and skid. This is because the 'lever' length is shortened. i.e. The distance from the centre of the wheel to the road surface is reduced, by 22.5mm, so it easier for the brakes to stop the vehicle. This isn't a major problem, because you should get used to it relatively quickly. If you fit the 60 tyres instead of the 65 tyres, you will be travelling slower than your speedo indicates you are.
