📝 [MDSP] QB ID: 0418 | VIE 04 – MDSP Elements

A casting process in which sand coated with a thermosetting plastic resin is dropped onto a heated metal pattern, which cures the resin. The shell segments are stripped from the pattern and assembled. When the poured metal solidifies, production rate and high dimensional accuracy with smooth surface.

These cores are made independent from the remainder of the mold and are then inserted into core prints to hold them in position.

Sand is packed into the box and scraped level with the top surface (which acts like the parting line in a traditional mold). This box is known as

Two halves are clamped together, and an opening is provided in one or both ends through which sand is introduced and rammed.

Various processes have been developed for the production of synthetic oil as a binder, and water with cereal or clay to develop green strength.

Sand containing a liquid thermosetting binder and catalyst is blown into a core box that has been heated to around 450°F (230°C). When the sand contacts the hot surface, the catalyst is heated, curing occurs within 10 to 30 seconds.

Binder-coated sand is first blown into the core box, which is then sealed and a gas is passed through the core to polymerize the resin. Room-temperature curing is the characteristic feature of this method.

These are used to support the cores and hold them in proper position during mold filling.

Small metal supports which can be positioned between the core and the surfaces of the mold cavity.

The third segment of the flask is called

An expendable-mold process in which a slurry of plaster, water, and various additives is poured over the pattern and allowed to set. The advantages of these are high dimensional accuracy and smooth surface finish and can reproduce thin sections

An expendable-mold process in which a ceramic powders are combined with binders and gelling agents to produce the mold material.

An expendable-mold process in which refractory slurry is formed around a wax or plastic pattern and allowed to harden. The pattern is then melted out and the mold is baked. Molten metal is poured into the mold and solidifies. The mold is then broken away form the casting. This is actually a very old process which is used by dentists and jewelers.

An expendable-mold process in which a pattern containing a sprue, runners, and risers is made from single or multiple pieces of foamed plastic, such as polysterene.

Materials processing are grouped into four basic families, namely the casting processes,_____,_____, and _____.

The manufacture of the desired shape from particulate material and involves aspects of casting, forming, and consolidation.

In casting, the molding material is then packed around the pattern and the pattern is removed to produce a space which is called.

In a two-part mold, the name given to the top half of the pattern, flask, mold or core is

A sand shape that is inserted into the mold to produce the internal features of a casting, such as holes or passages for water cooling.

An extra void created in the mold that will also fill with molten metal. It provides a reservoir of material that can flow into the mold cavity to compensate for any shrinkage that occurs during solidification.

The portion of the gating system that initially receives the molten metal from the pouring vessel and controls its delivery to the rest of the mold.

Part of the gating system in which the molten metal travels along horizontal channel s.is called

Additional channels to provide an escape for the gases that are generated within the mold is

The taper on a pattern or casting that permits it to be withdrawn from the molds

The term used to describe both the process and the product when molten metal is poured and solidified in a mold.

Solidification occurs in two stages, namely: nucleation and _____

The difference between the melting point and the temperature of nucleation is known as the amount of

A solidification stage that occurs as the evolved heat of fusion is continually extracted form the liquid material.

The plateau in the cooling curve that occurs during the solidification of a material with fixed melting point.

The time from the start of solidification to the end of solidification is called

The increase in temperature back to the melting point is known

In many materials, new crystals can nucleate in the interior of the casting and then grow to produce another region of spherical, randomly oriented crystals, known as the

When these metals then solidify, the solid structure cannot accommodate the gas, and the rejected atoms often form bubbles within the casting is known as

Passing small bubbles of inert or reactive gas through the melt is

The ability of a metal to flow and fill a mold is known

A system that serves to deliver the molten metal to all sections of the mold cavity

Ceramic filters are inserted into the gating system to trap the foreign material and is also called

These are added reservoirs designed to feed liquid metal to the solidifying casting as a means of compensating for solidification shrinkage

The most popular shape of a riser is a

Type of riser that is located adjacent to the mold cavity, displaced horizontally along the parting line

The major element/component of a babbitt metal

A given body in static equilibrium means that the same body can not _____

Pipe color of acid

This acts as deoxidizer and promotes fine grain in steel melting

Cold working or similarly in peening condition, steel material tend to be _____

Measuring instrument to check the hardness of rubber, plastic and other soft elastic materials.

_____ is an operation of producing a circular hole by the removal of a solid metal

Commonly used for tubes of water tube boilers made of large pipes from which a number of smaller ones lead to consuming points. This is called

This is a bearing material with a low coefficient of friction, resistance to any chemical, self-lubricated and can be utilized in a wide temperature range

A metal characteristic that absorbs extreme deformation without rupture is called

The ideal limit of teeth that sprockets can have in operation is _____/_____ (minimum/maximum)

A chromium SAE 4340 steel 6 inches diameter x 24 inches long shafting weighing 87.3 kgs. How about the weight (in-lbs) of an AISI 1030 steel shaft of same dimensions.

Cutting lubricants used in drilling, reaming and tapping for aluminum and copper

_____ is a material ability to resist deformation under stress

In the transmission shafting design the allowable maximum twist should not exceed _____ deg/feet length of shaft.

Dimensional variation allowed/prescribed in order to secure difference of fits between mating parts

High temperature surface heating of iron based material or alloyed steel above the transforming temperature range then followed by quenching is called _____

Very long center distances can cause catenary tension in the operation. The ideal design center distance is about eighty pitches.

SAE 1030 Carbon steel contains _____%C

AISI 8620 has an average carbon content is in the range _____%C

SAE 46xx is a steel designation for:

A file is a piece of high-carbon crucible steel having teeth cut upon its body by parallel rows. The parts of the file are: tang, heel and _____

This is a tool with hardened-steel points used for scribing circles or laying off distances. It is adjustable and is classified according to size by the maximum opening between the points and this points must be slender and sharp

In the SAE identification code of steel shafting the 3rd and 4th digits represents the content of:

The process of increasing the carbon content to the surface of steel by exposing it to hot carbonaceous material above the transformation temperature of 1650 to 1750 deg F.

It is a general practice to use the following allowance stresses, 4000 psi for main-power transmitting shaft and 8500 psi for small, short, countershafts. For line shaft, carrying pulley it is _____ psi.

Steel that has been deoxidized with a strong deoxidizing agent such as silicon or aluminum in order to eliminate oxygen and carbon reaction during solidification.

Device that prevents entrance of moisture and other fluids and permits pressure differential between the exterior and the interior:

Device use to guard surfaces against marring:

When the hole is smaller than the shaft, it will take force to put the parts together, the allowance is said to be negative and is called:

An impact test is used to test a metal for:

A partial bearing is one in which

For a completely corrosion resistant stainless steel, what minimum percentage of chromium in the alloy is required?

The amount by which the width of a tooth space exceeds the thickness of an engaging tooth on the pitch circles of a gear:

Steels containing large amounts of mild nickel and chromium

The product of the mass and the linear velocity of a body:

When a steel is described as SAE 1320:

The most important factor in determining highest temperature behavior of an alloy is:

Modulus of rigidity of a steel member is:

Arc of the pitch circle through which a tooth travels from the point of contact with the mating tooth to the pitch point of a gear:

The conical surface at the starting end of the thread is called _____.

It is a good design practice for steel line shafting to consider a limit to the linear deflection of _____ inch/foot length of maximum.

Determine the number 1/2 in diameter setscrews needed to transmit 8 hp at a shaft speed of 1000 rpm. The shaft diameter is 3.81 cm of SAE 1040 material

The soldering material commonly applied to automobile radiator cores and roofing reams.

Axially loaded rectangular groove in a hub and shaft:

Indicates how many times a volume of material is heavier than an equal volume of water.

The flux that should be provided in soldering electrical connection or commutator wires as it tends to corrode the connections.

Bevel gears subjected to corrosion and rightly loaded are usually made of _____.

A major component of cast steel

The factor of safety generally applied in wire of rope design starts at 3-4 standing rope application, 5-12 for operating rope and _____ for hazard to life and property application like foundry operation.

Split values have their maximum speed limited to _____ of solid pulleys

When an external gear is meshed with an internal gear, the gears will rotate in:

Taps are resharpened by grinding

Steel that has been deoxidized with manganese:

Main alloying element in High Speed Steel is:

A type of welding Process where in a mixture of aluminum powder and metal oxide powder is ignited by a special powder in a crucible.

In fly wheel design, the normal factor of safety is

Hardened steel parts have:

The center-to-center distance between sprockets should not be less than times the pitch.

A center distance between sprockets equivalent to times pitch is considered maximum. Very long center distances result in catenary tension in cham.