- (A) Passivity
- (B) High Fusion Temperature
- (C) High Molecular Weight
- (D) Co-efficient of Thermal Expansion
Medical Mcqs
- (A) More
- (B) Less
- (C) Equal
- (D) Depends on the alloy type
- (A) Prolonged heating:
- (B) Rapid heating me
- (C) Water film contamination
- (D) Too high pressure during casting
- (A) Rapid solidification of metal
- (B) No place for reservoirs
- (C) Incomplete evacuation of gases
- (D) Difficulty in removing casting from investment
- (A) William H Taggart
- (B) Buonocore
- (C) G.V. Black
- (D) Bowen
- (A) Candellila wax
- (B) Paraffin wax
- (C) Carnauba wax
- (D) Gum dammar
- (A) Prevent the oxidation of the metal during melting
- (B) increase the melting point of the flux
- (C) Flaring the point of the sprue attachment
- (D) None of the above
- (A) Suckback porosity
- (B) Gas inclusion porosity
- (C) Localized shrinkage porosity
- (D) Microporosity
- (A) N 25%
- (B) 25%
- (C) >40%
- (D) 0%
- (A) It prevents the formation of copper oxide
- (B) It prevents the formation of chromium oxide or dissolves chromic oxide layer
- (C) It prevents the flow of material in undesirable area
- (D) Increase the strength of solder
