What is the diff erence between extrusion and drawing?
What will be an ideal response?
Extrusion is a process whereby a continuous stream of a product is made by squeezing softened material (just below its melting point) through a small opening called a die. The material can be metal or plastic,
and the shape of the product takes the shape of the inner portion of the die. Drawing involves pulling a material through a die. The material is ductile so its structure allows plastic deformation. Metal wire and rod are produced by drawing metals through dies.
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If a weld is shown without a dimension, the size or depth of the weld is assumed to be equal to the thickness of the pieces.
Answer the following statement true (T) or false (F)
A safe hoisting and rigging operation requires the rigger to understand:
A. The weight of the load and rigging hardware. B. The lift capacity of the hoisting device. C. The working load limit (WLL) of the hoisting rope, slings, and hardware. D. All of the above
A push-button switch is used to input data to a register. The output of the register is erratic. Which of the following could be the cause of the problem?
A) The power supply is probably noisy. B) The register IC is intermittent and failure is imminent. C) The socket contacts on the register IC are corroded. D) The switch contacts are bouncing.
Using the results of Problem 2.35
Problem 2.35
Using a change of variable and the definition of the unit impulse, prove that
