1. . Copper is mostly used in
(A) Roofing
(B) Construction
(C) Electrical equipment
(D) Plumbing
2. . Gold, silver, copper and carbon are examples of
(A) Element
(B) Electron
(C) Neutron
(D) Carbon
3. . Brass is an alloy made up of copper and
(A) Zinc
(B) Carbon
(C) Sulphur
(D) Water
4. . Which gas is not used for fluxing and flushing in aluminium alloys?
(A) Argon
(B) Chlorine
(C) Nitrogen
(D) Oxygen
5. . Which furnace is not used for heating aluminium alloys?
(A) Electric arc furnace
(B) Pot furnace
(C) Induction heating furnace
(D) Crucible furnace
6. . Tin-based or lead-based alloys are types of ______
(A) White metals
(B) Copper base alloys
(C) Aluminum base alloys
(D) Ceramics
7. . Babbit metals are also known as _______
(A) Tin-base alloys
(B) Lead-base alloys
(C) Copper-base alloys
(D) Aluminum-base alloys
8. . How much antimony does a lead-base alloy contain?
(A) 13%
(B) 12%
(C) 74%
(D) 0.75%
9. . Tin-base alloys are replaced by aluminum-base alloys due to _______
(A) High cost
(B) Low strength
(C) Corrosion
(D) Low availability