The Mission (purpose) of battleships was to fight a decisive fleet action. Only ONCE did they ever complete that purpose; at the Battle of tsushima on May 27, 1905. They failed to fight a decisive sea action in WW1; and they were replaced by the aircraft carrier in WW2. The carriers fought decisive duels in WW2, not the battleships. The ONE time they were used, as designed by the architects & engineers, did result in the construction of HMS Dreadnaught, which was launched in 1906; thus starting the naval arms race which resulted in WW1.
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The ASME U stamp designates an unfired pressure vessel of more than 35 gallons (4.68 cu. ft.) has been built to ASME Code specifications, under ASME Code section 8. A U-1 form must be filed and signed by the authorized inspector for each and every pressure vessel built. The ASME U2 stamp is for unfired pressure vessels not built to ASME section 8 div. 1 standards, but under the alternative rules, has been inspected and found to comply with acceptable construction methods. A U-1 form signed by an authorized inspector must be filed for each such vessel, along with a description of the methods of construction used. The ASME U3 stamp is for high pressure (over 600 psi?) unfired pressure vessels. The ASME UM stamp is for pressure vessels less than 35 gallons capacity.
You cannot have a general answer for this. The comparison in strength depends on the chemical composition or grade of each, as well as the heat treatment and quenching method each received.
The last top answer just did not answer the question being asked, I understand that you want specifics when it comes to each class and the last guy just didn't understand that, but from my readings it seems that a class 3 has a mechanical disadvantage meaning it takes a stronger force to lift a smaller amount of resistance. What third class levers lack in lifting power it makes up with high velocity situations such as throwing something. meaning it is good with speed. Sorry but I have yet to figure out the other 2 classes
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the cc stands for cubic centimeters, so 1200 cc is the total displacement of the engine. It is the total volume, that the cylinders would displace for each stroke. For example. Suppose you have 4 cylinders in an engine. If each cylinder displaces 300cc for each stroke ( from Top dead centre to bottom dead centre), then it equals 1200cc for 4 cylinders.