Engg. Workshop_Moulding

Properties of moulding sand are

• Porosity

• Plasticity

• Adhesiveness

• All

This is the property of moulding sand to withstand high temperature of molten metal

• Collapsibility

• Cohesiveness

• Refractoriness

• permeability

Bentonite is commonly used as bonding material for dry sand cores.

• True

• False

In sand moulding the bottom most part of the flask is called.......

• Cope

• Cheek

• Drag

• Flask bottom

Mold is a _____.

• Vertical passage

• horizontal passage

• connecting passage

• cavity

Riser is a _____.

• vertical passage

• horizontal passage

• connecting passage

• cavity

Strike off bar is used to_______.

• mix the sand

• compact the sand

• remove the excess sand from the work zone

• none of these

Sprue pins are tapered so that _______.

• pattern can be removed easily

• surface can be smoothen easily

• the pins can be removed easily

• none of these.

The sand used here is known as green sand because_____.

• it is green in color

• it contains zircon

• it contains moisture

• none of these

Sieve is used for _______.

• plaining the surface

• for making holes on the surface

• for removing the foreign particles

• none of these