1.

In abrasion test, what material is placed in addition to the specimen in the testing apparatus?(a) Metal piece(b) Stone piece smaller than specimen(c) Cast iron ball(d) Stainless steel ball

Answer» Correct choice is (c) Cast iron ball

To elaborate: Abrasion test is used to check compatibility of stone with other material by allowing them to rub against each other, noting the wear resistance. Cast iron balls of  48 mm diameter are placed in the apparatus along with the specimen.


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