The Mohe Scale measure the specific gravity of a mineral The

The Mohe Scale measure the specific gravity of a mineral The order of these minerals is correct in the Mohs Scale: fluorite, quartz, corundum When strengthening a material by cold work its ductility also increases

Solution

Solution 1

The Mohs Scale measure the specific gravity of a mineral –FALSE

Mohs scale measure the hardness of minerals.

Solution 2

The order of these minerals is correct in the Mohs scale :Fluorite,quartz,Corundum –True

By Hardness value this order is correct Fluorite -4 Mohs scale hardness

                                                                Quartz       7 Mohs scale hardness

                                                              Corundum 9 Mohs scale hardness

Solution 3

          When strengthening the material by cold work its ductility also increase –False

When strengthening the material by cold work its ductility will significantly reduce.

Solution 4

The hall petch equation relates the yield strength of a material with dislocation density of material. False

The hall petch equation relates the yield strength of a material with grain size