Casting and Die Casting Quiz

<p>Ability to accommodate very thick sections without defects (C)</p> Signup and view all the answers

<p>External surfaces are stronger than internal surfaces. (C)</p> Signup and view all the answers

<p>High melting point alloys like aluminum, copper and brass (A)</p> Signup and view all the answers

<p>To act as the entry point through which molten metal enters the mold. (D)</p> Signup and view all the answers

<p>Very wide dimensional tolerances (A)</p> Signup and view all the answers

<p>Side gate (D)</p> Signup and view all the answers

<p>To maximize the rate of heat transfer at minimum cross-sections to promote uniform and directional solidification (A)</p> Signup and view all the answers

<p>It is directly released to the atmosphere. (A)</p> Signup and view all the answers

<p>To provide uniform cooling and uniform solidification at critical cross-sections (D)</p> Signup and view all the answers

<p>To ensure clean and easy withdrawal of the pattern from the mould. (D)</p> Signup and view all the answers

<p>By correctly positioned risers (C)</p> Signup and view all the answers

<p>All of the listed options (D)</p> Signup and view all the answers

<p>Thermal stability (B)</p> Signup and view all the answers

<p>50% sand and 50% clay (C)</p> Signup and view all the answers

<p>To enhance the casting's surface finish (D)</p> Signup and view all the answers

<p>Electrical conductivity (A)</p> Signup and view all the answers

<p>Hot tear (C)</p> Signup and view all the answers

<p>Used sand (B)</p> Signup and view all the answers

<p>Permeability (A)</p> Signup and view all the answers

<p>The strength of the sand when it contains moisture (A)</p> Signup and view all the answers

<p>To accurately align the cope and drag sections of the mold (C)</p> Signup and view all the answers

<p>The melting pot is separate from the machine. (D)</p> Signup and view all the answers

<p>For high melting point alloys, as the molten metal is transferred to the injection mechanism. (A)</p> Signup and view all the answers

<p>Centrifugal casting (D)</p> Signup and view all the answers

<p>The molten metal is not allowed to completely solidify in the mold. (B)</p> Signup and view all the answers

<p>The melting pot is an integral part of the machine (A)</p> Signup and view all the answers

<p>Metals such as Zinc, Tin, and Lead. (C)</p> Signup and view all the answers

<p>Volume of the mould (D)</p> Signup and view all the answers

<p>Solidification time (C)</p> Signup and view all the answers

<p>Wax or plastic (A)</p> Signup and view all the answers

<p>Capability to produce complex shapes with high accuracy (B)</p> Signup and view all the answers

<p>Runner area (D)</p> Signup and view all the answers

<p>1:4:4 (D)</p> Signup and view all the answers

<p>Inside the casting machine (B)</p> Signup and view all the answers

<p>Aluminum (D)</p> Signup and view all the answers

<p>Follow board pattern (C)</p> Signup and view all the answers

<p>To support structurally weak parts of a pattern during ramming (C)</p> Signup and view all the answers

<p>2 : 2 : 1 (A)</p> Signup and view all the answers

<p>To smooth and clean out depressions in the mould (C)</p> Signup and view all the answers

<p>Misrun (C)</p> Signup and view all the answers

<p>Improper riser design (D)</p> Signup and view all the answers

<p>Tungsten Inclusion (A)</p> Signup and view all the answers

<p>Cold shut (B)</p> Signup and view all the answers

<p>Weak pattern moulding (D)</p> Signup and view all the answers

<p>To produce castings with a very good surface finish and dimensional accuracy (D)</p> Signup and view all the answers

A type of sand used for the mold's inner surface, creating a smoother casting finish.

A casting defect caused by stresses during the cooling process of the molten metal.

A crucial property of molding sand that allows molten metal to flow through it easily.

Describes the ability of molding sand to withstand high temperatures without melting or fusing with the molten metal.

The strength of molding sand when water is added, making it green.

Measures how well the molding sand holds its shape when heated, ensuring smooth casting.

The strength of molding sand after it has been dried.

The sand's ability to withstand the pressure of the molten metal before collapsing.

The slight angle or taper provided on the pattern to allow for easy removal of the pattern from the mold without damaging the mold.

A system used in molding to direct molten metal from the pouring basin into the mold cavity.

A type of gating system where the molten metal enters the mold cavity from the top.

A type of gating system where the molten metal enters the mold cavity from the bottom.

A type of gating system used in molds with parting lines, where the molten metal enters the cavity at the parting line.

A type of gating system where the molten metal enters the mold cavity through multiple steps, with the height of each step gradually decreasing.

The heat lost from an energy source in a steam power plant that is not utilized for any useful purpose.

A component in a steam power plant that uses the waste heat from the exhaust gases to preheat the feed water.

A process where molten metal is poured into a mold to solidify into the desired shape.

A casting process using a permanent mold made of metal or other materials like steel or ceramic. The mold is reusable and offers high production rates, excellent surface finish, dimensional precision, and the ability to cast intricate shapes.

A cooling method used in casting where metal cools faster in thinner areas and slower in thicker areas of the mold. This helps ensure proper and uniform solidification of the metal.

Metallic devices placed in a casting mold to speed up cooling in specific areas, especially at thinner sections. This helps achieve more uniform solidification and avoids defects.

Areas in a casting mold that are designed to be larger than the final shape. These areas act as reservoirs of molten metal, feeding the casting as it solidifies. This prevents defects like shrinkage voids.

A high-melting point alloy is an alloy that requires a high temperature to melt. Examples include aluminum, copper, and brass alloys.

A type of sand used for casting that contains both sand and clay in equal proportions. It provides a good balance of strength and moldability.

A cold chamber process is a casting method where molten metal is poured into a mold from a cold chamber. This method is suitable for high melting point alloys where a hot chamber could damage the mold.

A metal casting process where the molten metal is injected into a die cavity at high pressure. The die is made of hardened steel and can be reused over and over again to create parts with very precise shapes and tolerances.

A type of die casting where the molten metal is poured into a mold that is already partially filled with a solid core. This process allows for the creation of parts with hollow cavities or intricate internal features.

A metal casting process where the molten metal is poured into a reusable mold made of metal or ceramic. This method is ideal for producing high-quality parts with intricate shapes and smooth finishes.

A type of casting where the molten metal is poured into a spinning mold. The centrifugal force created by the spinning motion distributes the molten metal evenly throughout the mold, resulting in a uniform casting with a dense and strong structure.

A metal casting process where the molten metal is poured into a mold made of sand. The sand mold is created by packing a mixture of sand and a binder around a pattern that represents the desired shape of the casting. This process is relatively inexpensive and versatile, but it can produce less accurate and less durable parts.

A metal casting process where a wax pattern is created instead of a sand mold. The wax pattern is then coated with a ceramic material, which is then heated and dried to form a solid mold. The wax is then melted out of the mold using a special process, and the molten metal is then poured into the empty space where the wax once was. The solid mold is then broken off to reveal the finished casting. This process is ideal for producing intricate parts with complex shapes.

A type of casting process where the molten metal is allowed to solidify only partially inside the mold, creating a hollow casting with a thin wall. This process is often used to create lightweight parts that are still strong and durable.

A type of casting where molten metal is forced into a mold cavity under pressure. The metal is heated inside the casting machine.

A type of pattern used for castings with weak sections that need extra support during ramming.

The ratio of areas in a gating system used to control the flow of molten metal. Typically, it's 1:2:4, representing the sprue base area, runner area, and ingate area.

A type of pattern used in casting where weak sections are reinforced with additional material added to the pattern.

A special type of pattern used in casting that can be split into two halves for easy removal from the mold.

A type of casting pattern that has been strengthened with additional material to prevent sagging during ramming.

A metal with a low melting point used in hot-chamber die casting.

A defect in metal casting where the liquid metal fails to reach all parts of the mold cavity, often due to insufficient fluidity or pouring temperature.

A casting defect caused by shrinkage stress during the cooling process, leading to cracks in the casting.

A casting defect where two streams of molten metal fail to fuse together properly, creating a weakness in the casting.

A casting defect where gas trapped inside the casting forms voids or bubbles, impacting its strength.

A casting defect where solid particles (like sand) become embedded in the casting.

A type of casting process where molten metal is forced into a mold under pressure, offering high accuracy and surface quality.

A casting defect where the metal solidifies before filling the entire mold cavity, leaving a portion unfilled.

A method used to clean and smooth depressions in the surface of a casting.