1. . For melting of cast iron, which of the following furnace is used?
(A) Rotary furnace
(B) Cupola furnace
(C) Pit furnace
(D) Electric furnace
2. . Why is sand bed prepared for melting of metal in Cupola furnace?
(A) It provides a refractory bottom
(B) It soaks the moisture from the metal
(C) It conducts the heat faster and uniformly
(D) None of the mentioned
3. . What is the function of slag hole in a cupola furnace?
(A) To tap the slag generated
(B) To generate the slag
(C) To allow outflow of gases
(D) All of the mentioned
4. . Incoming air pressure and quantity in cupola furnace are controlled by which of the following element?
(A) Tuyeres
(B) Tapping spout
(C) Wind box
(D) Blast pipe
5. . Which of the following chemical compound is the most common flux added to the charge in a cupola furnace?
(A) Coke
(B) Methane
(C) Carbon dioxide
(D) Limestone
6. . Electric arc furnaces are most suitable for which of the following type of material?
(A) Ferrous
(B) Non-Ferrous
(C) Both ferrous and nonferrous
(D) Neither ferrous nor nonferrous
7. . There is no direct contact of flame and metal in which of the following type of furnace?
(A) Cupola
(B) Crucible
(C) Electric arc
(D) Induction
8. . What is hearth in a furnace?
(A) The electrodes are often called hearth
(B) The walls of the furnace
(C) The bowl shaped bottom of the furnace
(D) The dome shaped roof of the furnace
9. . Why are flux added to the charge (parent metal to be melted) during melting of a metal?
(A) To increase carbon content
(B) To increase refractoriness
(C) To add specific oxides
(D) To remove specific oxides
10. . Gas-Fired burner is used in which of the following furnace?
(A) Induction Furnace
(B) Reverberatory Furnace
(C) Cupola Furnace
(D) Crucible Furnace