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WEDGE FRICTION:
Explain how wedge is used for raising heavy loads. Also give principle of it.
Sol.: Principle of wedge: A wedge is small piece of material having two of their opposite faces not parallel. To lift block of weight W, it is pushed by horizontal force P which lifts the block by imparting reaction on the block in direction 1r to meeting surface that is always greater than total downward force applied by block W This will cause resultant force acting in upward direction on block and moves up.
A tensile test on a specimen having an initial diameter of 13.11 mm and an initial gauge length of 200.0 mm, gave the following data:
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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Single Cylinder Vertical Engine has a bore of 30cm and a stroke of 40cm. The connecting rod is 100cm long. The mass of the reciprocating parts is 140Kg on the expansion stroke with
what is crippling load in column and strut
what is static indentation and dynamic indentation?
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