(A) zinc powder (B) bronze and steel (C) aluminium (D) nickel. 48. Viscosity is the basic quality of friction (A) water (B) flash (C) torced (D) oil. 49. Repair complexity was well understood that the amount of work and the complexity of (A) maintenance (B) involved in machine (C) requirement (D) repair. 50. This is a box type jig having ... Feb 12, 2018 Barite powder as a weighting agent is the most important additive into drilling mud for the oil and gas extraction. In this study, production of brown barite powder (SG 4.065 g/cm 3) was examined by flotation (direct and reverse) and magnetic separation for upgrading the quality of fine barite particles and receive it to the standard point for drilling applications (SG higher than 4.2 g/cm 3).