The sodium bentonite binder imparts swelling properties to the molding sand.

The sodium bentonite binder imparts swelling properties to the molding sand. Correct Answer True

Sodium Bentonite provides better swelling properties- volume increases some 10 to 20 times, high dry strength which lowers the risk of erosion, better tolerance of variations in water content, low green strength and high resistance to burnout, which reduces clay consumption.
Bissoy MCQ

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Natural Sand is mixed with bentonite gets its properties improved and is called Synthetic Sand.
Green sand molding is replacing the costlier molding processes as the sand control methods are being applied.
Dry sand molding is cheaper as compared to green sand molding.
Why are Kaolinite and Bentonite used as clay in molding sand?
Assertion A: Slow sand filters are more efficient in removal of bacteria than rapid sand filters.
Reason R: The sand used in slow sand filters is finer than that in rapid sand filters
Select your answer based on the coding system given below:
Pressure bag molding is relatively expensive due to tooling costs comparing to vacuum bag molding and autoclave molding.
Which of the following is the most basic binder used in the molding sand?
In sand casting of magnesium alloys, what is the amount of bentonite sand used in a British mix?