1. . Which of the labeled part of the following diagram is a core?
(A) a
(B) b
(C) c
(D) d
2. . Which of the following is not a function of a core?
(A) It is used to form internal cavities
(B) It is used to form a part of green sand mold
(C) It is used as a part of gating system
(D) It is used as a part of furnace
3. . Which of the following is a function of a core in casting?
(A) Interior cavitational passages in a casting
(B) To shape an external part of a more intricate casting
(C) To strengthen and improve inner and outer surface of the mold
(D) All of the mentioned
4. . What does the following figure represent?
(A) Half core box
(B) Split core box
(C) Gang core box
(D) Loose piece core box
5. . Cores are baked up to what temperature?
(A) 600°F
(B) 650°F
(C) 700°F
(D) 750°F
6. . What does an unbaked core generate?
(A) Greenhouse gases
(B) Mold gases
(C) Mold liquids
(D) Ultraviolet rays
7. . Which of the following core cannot be classified by the nature of core material employed?
(A) Dry sand core
(B) Shell core
(C) Sodium silicate core
(D) Oil bonded core
8. . Which of the following cores are produced by mixing silica?
(A) Green sand cores
(B) Dry sand cores
(C) Oil bonded cores
(D) Resin bonded cores
9. . What are the core boxes?
(A) Used to support cores
(B) Used to create cores
(C) Used to store cores
(D) Used to eject cores while ejection of casting after solidification
10. . Why should the finishing of the core be made good enough?
(A) The intricate shapes made are difficult for machine finishing
(B) The size of the cavities and contours must be accurate to enable perfect assemblies
(C) It reduces machining cost and time invested for that
(D) All of the mentioned