Question

________ is used to make the large castings of axi-symmetrical shapes.

(a) Loose piece pattern

(b) Skeleton pattern

(c) Sweep pattern

(d) Match plate pattern

This question was posed to me by my college director while I was bunking the class.

This intriguing question originated from Types of Patterns in section Pattern Materials & Moulding Sand Tests of Foundry and Forging

Answer 1

Right choice is (c) Sweep pattern

The explanation is: The sweep pattern to sweep the complete casting by means of a pattern. These are used for generating large shapes which are axi-symmetrical or prismatic in m=nature such as bell shaped or cylindrical. This greatly reduces the cost of 3 D pattern.