Question

The strength of the sand ____________ on drying.

(a) Remains same

(b) Increases

(c) Decreases

(d) Depends on the sand

I have been asked this question at a job interview.

I want to ask this question from Moulding Sand Preparation and Conditioning topic in section Pattern Materials & Moulding Sand Tests of Foundry and Forging

Answer 1

The correct option is (b) Increases

Best explanation: The tests are carried out with the standard specimen dried between 105 and 110 C for 2 Hours. Since the strength increases greatly with drying, it may be necessary to apply larger stresses than the other similar tests.