CBJ Metal Properties and Alloys 2 — Questions and Answers
Question 1: What metal is added in higher quantities to create rose gold?
- Copper (Correct answer)
- Zinc
- Nickel
- Palladium
Correct answer: Copper
Rose gold achieves its pinkish-red color from an elevated copper content in the gold alloy.
Question 2: What percentage of pure gold is found in 18-karat gold?
- 58.3%
- 75% (Correct answer)
- 83.3%
- 91.7%
Correct answer: 75%
18-karat gold contains 75% pure gold, calculated by dividing 18 by 24.
Question 3: Which metals are typically used to achieve the white color in white gold alloys?
- Platinum or silver
- Nickel or palladium (Correct answer)
- Zinc or tin
- Rhodium or iridium
Correct answer: Nickel or palladium
White gold is alloyed with nickel or palladium to produce a white appearance, then often rhodium-plated for brightness.
Question 4: What makes Argentium silver different from standard sterling silver?
- Higher silver content
- Addition of germanium for tarnish resistance (Correct answer)
- Lower silver content
- Addition of platinum
Correct answer: Addition of germanium for tarnish resistance
Argentium silver contains germanium, which significantly improves tarnish resistance compared to traditional sterling silver.
Question 5: Which physical property makes gold ideal for fabricating pieces requiring fine engraved or chased detail?
- High hardness
- Magnetic response
- Exceptional malleability (Correct answer)
- High melting point
Correct answer: Exceptional malleability
Gold's exceptional malleability allows it to be worked into extremely fine detail without cracking or tearing.
Question 6: Palladium belongs to which group of metals?
- Base metals
- Platinum group metals (Correct answer)
- Ferrous metals
- Alkali metals
Correct answer: Platinum group metals
Palladium is a platinum group metal (PGM), sharing similar chemical properties with platinum, rhodium, and others.
CBJ Metal Properties and Alloys 2
What metal is added in higher quantities to create rose gold?