- (A) nichrome
- (B) invar
- (C) magnin
- (D) elinvar
- (E) peiminvar
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- (A) 70% copper and 30% zinc
- (B) 90% copper and 10% tin
- (C) 85-92% copper and rest tin with little lead and nickel
- (D) 70-78% copper and rest tin
- (E) 85-92% copper and rest zinc
- (A) 70% copper and 30% zinc
- (B) 90% copper and 10% tin
- (C) 85-92% copper and rest tin with little lead and nickel
- (D) 70-75% copper and rest tin
- (E) 90% copper and 10% zinc
- (A) nickel, chromium and manganese
- (B) tungsten, molybdenum and phosphorous
- (C) lead, tin, aluminium
- (D) zinc, sulphur, and chromium
- (E) none of the above
- (A) gun metal
- (B) bronze
- (C) bell metal
- (D) babbit metal
- (E) brass
- (A) purification of metal
- (B) grain refinement
- (C) working at lower temperature
- (D) all of the above
- (E) none of the above
- (A) greater than 7
- (B) equal to 7
- (C) less than 7
- (D) pH value has nothing to do with basic solution
- (E) none of the above
- (A) greater than 7
- (B) less than 7
- (C) equal to 7
- (D) pH value has nothing to do with neutral solution
- (E) none of the above
- (A) 87.75% Sn, 4% Cu, 8% Sb, 0.25% Bi
- (B) 90% Sn, 2% Cu, 4% Sb, 2% Bi, 2% Mg
- (C) 87% Sn, 4% Cu, 8% Sb, 1% Al
- (D) 82% Sn, 4% Cu, 8% Sb, 3% Al, 3% Mg
- (E) none of the above
- (A) 94% aluminium, 4% copper and 0.5% Mn, Mg, Si and Fe
- (B) 92.5% aluminium, 4% copper, 2% nickel, and 1.5% Mg
- (C) 10% aluminium and 90% copper
- (D) 90% magnesium and 9% aluminium with some copper
- (E) 10% aluminium and 90% tin
