Illustrate moisture content test, Mechanical Engineering

Q. Illustrate Moisture content test ?

Moisture content test: Moisture is an important constituent of moulding sand. Its content in the moulding sand can be estimated as given below:-

By  the  loss  of  weight  after  evaporation:  Test  sample  is  carefully weighed 50 gm of moulding sand. It is heated for 2 hours at 1050c to 1100c. It is then allowed to cool to room temperature on a desicator, after which it is reweighed. The difference in weight divided by the weight of the sample and multiplied by 100 give the percentage of moisture content.

By moisture teller: A in this method, the sample is placed on the teller pan which has 500 mesh screens in the bottom. Hot air is blown through the sand. Moisture gets removed in only about 5 minutes and so the method is quite fast. The sand sample is weighed directly in the teller pan, and the loss in weight is accordingly determined.

By moisture teller based on chemical reaction: In this method, a measured weight of sand (10 gm) in a cap is placed in the moisture teller along with a container containing a measured amount of CaC2. The reaction of CaC2 with moisture in the sand will produce C2H2,

CaC  + 2H2O    → C2H2   + Ca(OH)2

The amount of C2H2 produced is proportional to the content of moisture in the sand. The moisture content is directly measured from a calibrated scale on the instrument.

Posted Date: 5/30/2013 6:43:26 AM | Location : United States







Related Discussions:- Illustrate moisture content test, Assignment Help, Ask Question on Illustrate moisture content test, Get Answer, Expert's Help, Illustrate moisture content test Discussions

Write discussion on Illustrate moisture content test
Your posts are moderated
Related Questions
A new process plant for ore processing is currently being planned. The design is only in the first stage. However, three requirements have already been clearly stated: - The bins s

Engineering Plastics In this time this has become clear to know, the plastics are utilized as engineering materials for machine parts, casting and bodies and for structure mai

Power Metallurgy- The more appropriate name should be "Particulate Processing Methods". Here the particles of various sizes of metals, ceramics, polymers and glass etc, are presse

The Contractor shall perform all work with the highest quality workmanship throughout to provide a neat, uniform appearance with no sharp edges exposed. Insulation shall not be

Q Describe about Push-pull welds? - A push-pull system employs transformers with an electrically reversed polarity arrangement wherein two transformers complement each o

Illustrates about the need for reinforcement? NEED FOR REINFORCEMENT Concrete is economical and durable and is currently universally utilized for footings. Plain concrete is

Determine footing moment analysis for given demonstration. Ans: Assuming effective depth as d, Bending moment M at the face of column M = ((273.60 x 2.80 x (1.40 - 0

a) By Gauss elimination method, solve x+2y+z =3 ; 2x+3y+3z =10 ; 3x-y+2z =13 b) Write a ‘C' program to find the solution of the above system of equations by Gauss Jordan meth

Tensile strength: What will be its ultimate tensile strength? Solution The condition for necking is = n = 0.3077 Hence using this value of , the true stress at ne

Basic Concep: Proper care and maintenance are essential for trouble free operation and optimum performance of the motorcycle. A quality service at regular intervals ensures that e