Which one of the following is incombustible ?

Related Mcqs:

Tumbling is the process of improving the ________________ of the materials/parts ?

A. Surface finish B. Fatigue limit C. Creep limit D. Surface cleanliness...

The refractory lining of the bottom in a basic electric arc furnace is made of___________________?

A. Silica B. Alumina C. Magnesia D. Fireclay...

________________ is a special constituent of chlorophyll without which photosynthesis is not possible ?

A. Calcium B. Nitrogen C. Phosphorous D. Hydrogen...

Fahrenheit and Centigrade scales have the same readings at _____________________?

A. -55° B. -40° C. -33° D. -58°...

Pick out the wrong statement ?

A. A ferromagnetic material becomes paramagnetic above the ‘Curie temperature’ B. Permanent magnets are made of hard materials, whereas electromagnets require soft magnetic materials C. Soft magnetic materials (e.g., pure iron) have higher permeability and low hysterisis loss and coercive forces D. Tungsten steel and alnico are not hard magnetic materials...