Question

Wooden patterns have a high maintenance cost.

(a) True

(b) False

This question was addressed to me during an interview.

The query is from Pattern Materials topic in portion Pattern Materials & Moulding Sand Tests of Foundry and Forging

Answer 1

Correct choice is (a) True

Explanation: The wooden patterns can be shaped easily and are relatively cheap. But the main disadvantage of wood is its absorption of moisture as a result of which distortions and dimensional changes occur. A good construction may be able to reduce the war page to some extent. Hence, proper seasoning and upkeep of wood is a pre-requisite for large scale use of wood as a pattern material.