Which of the following oxides is not present in hematite iron ore ?

Related Mcqs:

Higher is the mesh number, smaller will be the aperture size of the screen. It means that the aperture size of a 200 mesh screen will be smaller than that of 20 mesh screen. This is valid for__________________?

A. British standard screens B. German standard screens (DIN 1171) etc C. American standard screens (ASTM and Tyler standard screens) D. All A., B. and C....

The important dimensional group involved in the power requirement calculation in mixing operation is the _____________ number?

A. Reynold’s B. Froude C. Both A. & B. D. Neither A. nor B....

Which of the following is the most suitable filter for separation of abrasive solids suspended in a corrosive liquid ?

A. Sand bed filter B. Plate and frame filter press C. Vacuum filter D. Batch basket centrifuge...

Gummy & sticky materials like molasses, sugar etc. are best transported/handled by using a ______________ conveyor?

A. Drag B. Ribbon C. Screw D. Slat...

During washing of filter at the end of constant pressure filtration, the rate of washing equals the rate of filtration___________________?

A. At time zero B. At the end of filtration C. When half the filtrate has been obtained D. At the end of filtration, but decreases with time subsequently...