-_are small openings made into the mould through which liquid metal enters the cavity.

Q: 2. 3. State two reasons why moisture is required in moulding sand

A: Q.2 The blow holes is the casting defect due to excessive moisture in the mould . In blow holes the…

Q: Some defects of casting parts are represented in the following photos and metallographic images.…

A: Defects: (a) Rough Surface (b) Gas porosity (Pinhole) (c) Cold shut (d) Hot tears

Q: Which of the following are advantages of die casting over sand casting? O Larger parts can be casted…

A: Die casting is the process in which molten metal is force with high pressure to the die. There are…

Q: Explain the three stages in the casting process and its applications.

A: Explain the three stages in the casting process and its application

Q: Which of the following helps to prevent the impurities and foreign materials from entering into the…

A: While poring the liquid metal into the mould it is very important to prevent the impurities to enter…

Q: The height of the down sprue is 175 mm and its CS are at the base is 200 mm² The CS area of the…

A: Given:Height of the down sprue, h=175 mmCross section area at the base, A=200 mm2CS area of the…

Q: 1. The blank for the spool shown in Fig. below is to be sand cast out of A-319, an aluminum casting…

A:

Q: To permit escape of gases generated in the mold, following are provided. O Chaplets O Vents Runner O…

A: Chaplets- it is used to provide support to cores in casting process. It is kept inside the mold. It…

Q: A sand casting mold is shown. All bottom and side plates have a uniform thickness of 1". The bottom…

A: Given : To find : Design a cylinder

Q: What is the operation of parting?

A: Parting operation

Q: In sand moulding and casting process, which of the following is the purpose of a chill? a. To…

A: In the Sand casting chills and padding are used to create directional solidification. In the casting…

Q: For which of the following reasons is a green mold so- named? * O Moisture is contained in the mold…

A: Correct answer: A) Moisture is contained in the fold

Q: For the casting of the part, whose perspective pictures are given below, take into account the…

A:

Q: Casting is a manufacturing process in which a liquid material is usually poured into a mold, which…

A: The mould, which is made from a mixture of sand, clay, and water, is the most important…

Q: The advantage of using an open mold is which one of the following: O higher production rates are…

A: We have to to best option and explain  The advantage of using an open mold is which one of the…

Q: A sprue in a sand mould has a top diameter of 20mm and height of 200mm. The velocity of the molten…

A:

Q: The flow rate of liquid metal into the downsprue of a mold = 1 liter/sec. The cross-sectional area…

A: GIVEN DATA - Q=1 lit/sec h=175mm A1=800mm2 WE HAVE TO CALCULATE BOTTOM AREA OF SPRUE

Q: A sprue in a sand mould has a top diameter of 20 mm and height of 200 mm. The velocity of the molten…

A: Sprue is a channel through which molten metal passed to the mould. Sprue can be made of plastic,…

Q: Q3) Answer the following questions:- (A) Describe various kinds of patterns in use? And explain the…

A: (A) Kinds of Pattern- 1. Solid/ single piece pattern- Solid piece pattern is used for the production…

Q: A mould having dimensions 100 mm x 90 mm x 20 mm is filled with molten metal through a gate with…

A: Given:Mould dimensions =100 mm x 90 mm x 20 mm

Q: A vertical centrifugal casting process is used to produce bushings that are 0.2 m outside diameter…

A:

Q: A shell of 100 mm diameter and 100 mm height with the corner radius of 0.4 mm is to be produced by…

A: Given:Shell diameter, d=100 mmHeight, h=100 mmcorner radius, r=0.4 mm

Q: The height of the down sprue is 175 mm and its CS are at the base is 200 mm2. The CS area of the…

A: Given:Height of down sprue, H=175 mmarea of the base=200 mm2g=10 m/s2

Q: What is the difference between casting and forging process? Explain the three stages in casting…

A: Diff between casting and forging process

Q: b) A sand casting process is to be performed using a certain alloy to produce a cube shaped casting…

A: Given:Side of cube casting, a=50 mm or 0.05 mFlow rate, Q=1000 cm3/sheight of sprue, h=25 cmdiameter…

Q: A sprue in a sand mould has a top diameter of 20 mm and height of 200 mm. The velocity of the molten…

A: Draw a diagram showing the sprue. Here, 1, 2 and 3 indicate the points as shown in the figure, h2…

Q: q1 What is the difference between casting and forging process? Explain the three stages in casting…

A: In the casting process, metal is heated until molten. Then it is poured into a mold or vessel to…

Q: A vertical gating system has a sprue height of 250 mm, one ingate located 150 mm below the mould top…

A: According to the Bernoulli's equation, the velocity of the fluid at any cross section which is…

Q: 1.  Explain the three stages in casting process and its applications

A: Casting stages and its application

Q: A mould has downsprue whose length is 20 cm and the cross sectional area at the base of the…

A: Length of the sprue, h=20 cm or 0.2 mCross sectional area at the base of the downsprue, A=1 cm² or…

Q: For casting processes in metals, which of the following are true? (This question has more than one…

A: Explaining casting processes in metal.

Q: A column of molten metal placed in the mould to feed the casting as it shrinks and solidifies is…

A: Sprue is used to feed the molten metal to the mold through laddle. Runner is a passage through which…

Q: Highlighting the positive pattern making allowances, explain in detail with a neat sketch and…

A: In positive allowance the pattern is made slightly higher than the actual size. This is done to…

Q: n metals as it cools prior to its solidification. (b) Contraction of the metal during phase change…

A: given: Describe the stages involved in the contraction of metals during casting.(a) Contraction of…

Q: A component is sand casted in pure aluminum. The level of the metal inside a pouring basin is 215 mm…

A:

Q: The quality of the final product is not dependent on : O The metal used in Casting O Allowance…

A: Solution:

Q: For which of the following reasons is a green mold so- named? * O Moisture is contained in the mold…

A: Green mold- it is the main part of sand casting process in which mold is created in sand and they…

Q: Q1. A mold sprue is 20 cm long, and the cross-sectional area at its base is 2.5 cm2 .The sprue…

A: Given, h = 20 cm A = 2.5 cm2 V = 1560 cm3 g = 1000 cm/s2

Q: lten into the mould cavity C)greater dimensional stability of t

A: given: In a green sand moulding process, uniform ramming leads to (a) less chance of gas porosity…

Q: QUESTION 16 Riser is a cavity connected to the gating system feeding the casting when it is…

A: Answer 16: Elements of the gating system: Pouring basin Runner Down sprue Gates Riser Sprue base…

Q: 5) In explosive forming, the tank that is filled with water should be open from the

A: “Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: Optimum pouring time for a casting of cast iron of mass 60 Kg and a section thickness 50 mm is (take…

A: For cast iron casting of less than 450 kg, optimum pouring time is given by, t = K 1.41 + T14.59 W…

Q: 5. A sprue is 200 mm long. The velocity of the molten metal at the top of the sprue is 0.1 mm/sec.…

A: for sprue systems , if we neglect the aspiration effect of the mould we can say derive the velocity…

Q: 2. A mold sprue is 180 mm long, the cross-sectional area at its base is 2.4 cm2. The sprue feeds a…

A:

Q: (1) In sand casting, the volumetric size of the pattern is: (a) bigger than, (b) the same as, or (c)…

A: 1. In sand casting the volumetric size of the pattern is  a) Bigger than  b) The same as  c) Smaller…

Q: QUESTION 14 Pieces thicker than 5.45mm are considered sheet. O True O False QUESTION 15 In sand…

A:

Q: 1: What is the difference between casting and forging process.

A:

Basic Thermodynamic Processes

The word 'thermodynamics' can be divided into two words, 'thermo' and 'dynamics'. The word thermo deals with the heat and thermal phenomenon, whereas dynamics deals with forces or external agent that drives the heat flow or aids in the motion of heat.