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
D i f fe r enc e between components and resolved parts: 1. When the force is resolved into two parts along the two mutually perpendicular directions, the parts along th

The basic aim of synthesis in design process is to provide information which can tell you how to improve the design. In general the synthesis process gives many alternatives of

Q. Explain about Hydrostatic Test? All paragraph must be met when the hydrostatic test is employed. UG-99(b), including footnote 32, shall be considered to be the standard hyd

Determine the Forces On Bar Two bars and a cable are used to support a block as shown. The two bars have negligible weight and the pulley is free to rotate. The mass of the pu

Determine the stress in the meridional direction: A doubly curved shell of thickness 8 mm is filled through a liquid under an internal pressure of 2.0 N/mm 2 . At a specific p

Use s of Carnot Cycle: 1. It helping us to appreciate what factors is desirable in the design of practical cycle; namely a maximum possible temperature range. 1 maximum p

Example of change of enthalpy: Q 0.5kg/s of a fluid flows in steady state process. The properties of fluid at the entrance are measured as p 1 = 1.4bar, density = 2.5k

laws of belts ?

solve the following differential equation: dy/dx-(1+1/x)y=y^2

Define Essentials of Milling Fixture? Strength of withstand heavy forces. Thrust should be directed towards a strong, solid structure. Cutter setting piece should b