Residual magnetism in steel for magnets is increased by the addition of__________________?

A. Cermet
B. Glass
C. Thermosetting plastic
D. Metallic alloy

A. Silicon
B. Phosphorus
C. Sulphur
D. None of these

A. Ferromagnetic
B. Diamagnetic
C. Paramagnetic
D. None of these

A. Lead lined stainless steel
B. Cast iron
C. Steel or cement-brick lined
D. Hard wood