Answer / harshareddy

ia a man hole is designed and manufactured in complex shapes like rectangle or triangle or in square shape , thereare some stresses developed at the edges due to uneven cooling of metal crystals during casting . the high pressures developed in the vessels firstly weakened the highly stressed parts and tends to repture and failure ,so mainly round shapes and elliptical shapes are considered to manufacture

hi friends any body please help me i am going to write rrb examination for tecnical trade mech. pls tell me perfect authour name and publicataions for rrb objective type mech engg or any other options to prepare

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