More than 95% of _______________ is present in corundum ?

Related Mcqs:

Which of the following is not used as a bearing material ?

A. Copper-lead alloys B. Babbitts C. Bronzes D. Cermets...

In “Imperial Smelting Process” for extraction of zinc, zinc vapour thus produced is quenched in the external condenser by the use of the following _______________________?

A. Jet of water at high pressure B. Blast of air C. Mixture of water and air D. Rain of molten lead...

______________ joint is usually used for joining cast iron pipes mostly used for temporary pipelines, where it may be necessary to dismantle & reassemble the pipeline very frequently ?

A. Collar B. Flanged C. Bell and Spigot D. Expansion...

Unit of surface tension in S.I. unit is_________________?

A. Watt/m B. Joule/m2 C. Newton/m2 D. Joule/m...

The mechanism which changes the value of manipulated variable in response to the output signal from the control unit is called the___________________?

A. Final control element B. On-off control C. Floating control action D. None of these...