Discussion
To show the cross-section of a crane hook in machine drawing, the type of section used is :
Answer: A
The section used is a revolved section.
A revolved section shows the shape of a part's cross-section by cutting it at a point, turning the section through 90° and drawing it on the view itself. It suits long members whose section changes along their length, such as crane hooks, spokes, arms and ribs.
A full section and a half section show the interior of a whole object rather than the section of a slender member. A removed section is the same idea drawn away from the view, usually where there is no room on the view itself, so the standard choice for a crane hook is the revolved section.
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