1. . The chemical formula of silica sand is
(A) SiO
(B) CaCO3
(C) CaO
(D) SiO2
2. . Olivine sand is popular in
(A) India
(B) Russia
(C) Europe
(D) America
3. . The sand which has the highest fusion point of all the base sands
(A) Chromite
(B) Silica
(C) Zircon
(D) Olivine
4. . Sand which is used to keep the green sand not to stick to the pattern is
(A) Molding
(B) Loam
(C) Natural
(D) Parting
5. . The sand next to the surface of the pattern and forms the face of the mould cavity is
(A) Baking
(B) Parting
(C) Facing
(D) System
6. . The used sand is cleaned and re-activated by the addition of water and special additives are called
(A) Baking sand
(B) Facing sand
(C) System sand
(D) Parting sand
7. . Sand grains give poor bonding strength as compared
(A) Round
(B) Compound
(C) Angular
(D) Sub-angular
8. . Sand grains gives good surface finish but possesses low permeability
(A) Fine
(B) Course
(C) Medium
(D) Round
9. . Earthy material that is plastic when moist but hard when fired
(A) Sand
(B) Additives
(C) Moisture
(D) Clay
10. . The amount of moisture content in the molding sand varies from
(A) 2-8
(B) 7-10
(C) 50-60
(D) 1-4