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A steel tube of 30 mm external diameter and 20mm internal diameter encloses a copper rod of 15mm diameter to which it is rigidly joined at each end. If at a temperature of 10o C, there is no longitudinal stress, evaluate the stresses in the rod and the tube when the temperature is raised to 200o C. Take E for steel and copper are 2.1 x 105 N/mm2 and 1x 105 N/mm2 respectively. The value of coefficient of linear expansion for steel and copper is given as 11 x 10-6 per degree C and 18 x 10-6 per degree C respectively.
Explain Rake angle - Angles of a drill It is also known as helix angle .It is the angle formed between a plane containing the drill axis and the leading edge of the land. It c
PRE HEAT INTERPASS TEMP. REQUIREMENTS FOR FILLER METALS The preheat and inter pass temperature must be sufficient to prevent the cracking.Previous Experience has shown that t
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Mechanical failure is one of the most important factors causing component/structure/product no longer fit for its intended purpose. Use examples to explain at least three modes o
Determine the maximum torque - shaft: Determine the maximum torque that can be safely transmitted by a shaft of 400 mm diameter, if (a) the maximum allowable shear stress i
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Q. Show the Sources of Ignition? Sources of Ignition - Possible sources of ignition include the following: • Electrical: Sparks or arcs may occur when current carrying cont
Petrol: Work in a well-ventilated area. Keep flames or sparks away from the work area or where petrol is stored.
Charpy impact tests, when required shall comply. Impact tests shall be conducted at the minimum design metal temperature or at a lower temperature and shall meet or exceed energ
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