Description : Carborundum is prepared heating a mixture of
Last Answer : silicon and coke in an electric furnace
Description : Carborundum is another name of – (1) Silicon carbide (2) Silicon oxide (3) Calcium carbide (4) Calcium oxide
Last Answer : (1) Silicon carbide Explanation: Silicon carbide, also known as carborundum, is a compound of silicon and carbon with chemical formula SiC. It occurs in nature as the extremely rare mineral moissanite. Silicon carbide powder has been massproduced since 1893 for use as an abrasive.
Description : Which of the following additives are added to plastics to make it impervious to X-rays? (A) Asbestos (B) Barium salt (C) Carborundum (D) Phthalic acid
Last Answer : (B) Barium salt
Description : Hardest material so far found is (A) Diamond (B) Graphite (C) Carborundum (D) Pumice stone
Last Answer : (A) Diamond
Description : The hardest material just prior to diamond in Mho's scale is (A) Topaz (B) Carborundum (C) Corundum (D) Calcite
Last Answer : (C) Corundum
Description : Hardest materials so far found is (A) Diamond (B) Graphite (C) Carborundum (D) Pumice stone
Description : The hardest material just prior to diamond in Mhos scale is (A) Topaz (B) Carborundum (C) Corundum (D) Calcite
Description : The main constituent of carborundum is __________ carbide. (A) Calcium (B) Silicon (C) Boron (D) Aluminium
Last Answer : (B) Silicon
Description : Spark plugs are made of (A) High alumina ceramic (B) Metallic carbides (C) Corundum (D) Carborundum
Last Answer : (A) High alumina ceramic
Description : Out of (a) Graphite and (b) Carborundum which one is harder ?
Last Answer : Carborundum.
Description : Which of the following is not an abrasive material? (A) Bakelite (B) Pumice (C) Corundum (D) Carborundum
Last Answer : (A) Bakelite
Description : Carborundum consists mainly of (A) Bauxite (B) Silicon carbide (C) Boron carbide (D) Calcium carbide
Last Answer : (B) Silicon carbide
Description : Which rotary instrument gives the smoothest enamel cut? a. carborundum stone (green stone) b. aluminum oxide stone (white stone) c. plain fissure bur d. cross-cut fissure bur e. medium diamond bur (great efficiency but roughest cut)
Last Answer : c. plain fissure bur
Description : Carborundum is another name of (1) Silicon carbide (2) Silicon oxide (3) Calcium carbide (4) Calcium oxide
Last Answer : Silicon carbide