Co2 moulding is a kind of sand moulding, but it is not economical than – McqOptions

MCQOPTIONS

1.	Co₂ moulding is a kind of sand moulding, but it is not economical than the green sand moulding.
A.	True
B.	False
Answer» B. False

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WHICH_OF_THE_FOLLOWING_ADDITIVES_ARE_ADDED_TO_THE_SAND_IN_CO<SUB>2</SUB>_MOULDING_FOR_THE_IMPROVEMENT_IN_COLLAPSIBILITY_OF_THE_SAND??$
Moisture from the mould can be removed by using of dryer or heater in Co<sub>2</sub> moulding.$
Co<sub>2</sub>_moulding_process_is_an_ideal_process,_where_speed_and_flexibility_is_the_prime_requirement.$
Co<sub>2</sub> moulding is a kind of sand moulding, but it is not economical than the green sand moulding.
It is very safe to use Co<sub>2</sub> in Co<sub>2</sub> moulding, so it eliminates the use of any shielding apparatus?
Sometimes over-gassing can cause the sticking of pattern to the mould in Co<sub>2</sub> moulding.
Additives can be used for the non-ferrous application to avoid the poor collapsibility of the mould.
How much time (in a minute) is usually required for the passing of Co<sub>2</sub> through the mould?
Continuous passing of Co<sub>2</sub> through the mould can decrease the strength of mould and results in a weak mould.
How much percentage of sodium silicate (Na<sub>2</sub>SiO<sub>3</sub>) is added to the sand mixture in Co<sub>2</sub> moulding?