This set of Casting, Forming and Welding Multiple Choice Questions & Answers (MCQs) focuses on “Setting The Cores”.
Explanation: The following figure represents a radiator chaplet. This particular chaplet holds a very important duty, wherein it helps the cores by supporting them.
Explanation: The material in place of the question mark is a mold cavity. Inside this mold cavity, there some place into which, while operating, the mold is kept.
Explanation: The apparatus in place of the question mark is a core seat. The core seat plays a vital role in this operation. It helps in holding the core firmly.
Explanation: In the place of the question mark, it is a chaplet, which are positioned in between mold and core surfaces.
Explanation: The material which is in the place of the question mark is molding sand. The molding sand is an important component as, on this the entire apparatus is kept.
6. Which force is experienced by cores in the mold?
a) Shear force
b) Magnetic force
c) Buoyant force
d) Electric field force
Explanation: The force experienced by the cores inside the molds is a buoyant force, which is the upward force exerted by a fluid. This force is available due to poured molten metal.
7. How many core prints are required to locate a core?
Explanation: Core prints or core seats are used for the location of a core. For this, an amount of three core prints or core seats are enough to properly locate a core.
8. What is positioned between mold and core surface?
b) Molding surface
c) Core seat
d) Mold cavity
Explanation: Chaplets are a type of metal shape which are positioned between mold and core surface. These chaplets first melt and then they become a part of the castings.
9. When does chaplet become a part of casting?
a) After molding sand is poured
b) After molding cavity is introduced
c) After molten metal is poured
d) After core prints provide the pattern
Explanation: Chaplet becomes a part of casting by melting. Chaplet melts and becomes a part of it. Chaplets are a type of metal shape which are positioned between mold and core surface.
10. Big cores are set in molds by hand.
Explanation: Big cores are set up quite easily with the help of cranes, whereas when small cores are to be set up, they are set in molds using a hand.
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