What is the correct answer?


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

A. Silica

B. Alumina

C. Magnesia

D. Fireclay

Correct Answer :

C. Magnesia

Related Questions

Gas turbine normally employs a constant __________ cycle. The temperature at which ferromagnetic material can no longer be magnetised… Oxyacetylene reducing flame is used while carrying out welding on Heating the Hypo-eutectoid steels to 30°C above the upper critical… Pick out the wrong statement. Which of the following is not the commercial name of poly-methyl-methacrylate… __________ iron is produced by the annealing of white cast iron. Cold heading or upsetting is categorised as the __________ process. CANDU type nuclear reactor using natural uranium as fuel is the extensively… Sand used to stop the green sand from sticking to the pattern is termed… Laser welding is widely employed in the __________ industries. Exposure to __________ accelerates the degradation of plastics. Strain hardening effect in a metal subjected to cold working is due to… Pick out the wrong statement. In inventory control theory, the economic order quantity (EOQ) is the The mechanism involved in the removal of metal in drilling operation is… Nusselt number is related to the Reynolds number (Re) in turbulent & laminar… Drills are usually made of Nickel is a __________ material. A high pressure boiler generates steam at a pressure greater than __________… Superheating of steam is done at constant Notched bar test is used for testing the __________ of a material. Chlorine acts as a bleaching agent only in the presence of The refrigerant freon-12 is chemically Limestone addition in the blast furnace is done to flux __________ present… The laminar boundary layer thickness in zero pressure gradient flow over… Babbitt lining is used on brass/bronze bearings to increase the Hydrogen can be Maximum permissible air velocity in pipelines is about __________ metre/second. Brinell Hardness Number (BHN) for talc is approximately in the range of