A. Diamond
B. Graphite
C. Carborundum
D. Pumice stone
Related Mcqs:
- Hardest material so far found is__________________?
A. Diamond
B. Graphite
C. Carborundum
D. Pumice stone - The hardest material just prior to diamond in Mhos scale is_________________?
A. Topaz
B. Carborundum
C. Corundum
D. Calcite - Which of the following is the hardest material ?
A. Topaz
B. Quartz
C. Corundum
D. Fluorite - Which of the following is the hardest _______________?
A. Cementite
B. Pearlite
C. Austenite
D. Ferrite - The hardest material just prior to diamond in Mho’s scale is___________________?
A. Topaz
B. Carborundum
C. Corundum
D. Calcite - Diamagnetic materials are magnetised________________?
A. Strongly
B. Only slightly
C. With eddy currents only
D. In a direction opposite to that of the applied field - Cermets are ______________ materials?
A. Refractory
B. Reinforced
C. Abrasive
D. Fully metallic - All materials obey Hooke’s law within elastic limit. When elastic limit is reached, the tensile strain__________________?
A. Increases very quickly
B. Decreases very quickly
C. Increases in proportion to stress
D. Decreases in proportion to stress - An elastic behaviour of materials is expressed in terms of_______________?
A. Hysteresis loop area
B. Stress-strain curve
C. Relaxation time
D. None of these - Which of the following materials may prove unsuitable for handling acetic acid (glacial & anhydrous) at 40°C ?
A. Silicone rubber, teflon, porcelain and wood
B. Nickel, monel, stainless steel and graphite
C. Aluminium, copper, high silicon iron
D. Brass, cast iron, mild steel and tin
