Question: Copper content in low copper amalgam is________________?

• 1. 6%
• 2. 12-30%
• 3. 29%
• 4. 19%

Question: Which of the following silver amalgam alloy have the maximum strength________________?

• 1. Lathe cut
• 2. Spherical
• 3. Admixed
• 4. Single composition

Question: What is the most frequently used restorative material ?

• 1. Silicate
• 2. Amalgam
• 3. Composite
• 4. Gold

Question: How soon after a moisture contamination does a zinc containing amalgam alloy start expanding________________?

• 1. 24 hours
• 2. 1-2 days
• 3. 3-5 days
• 4. 7 days

Question: The percentage of copper in high copper alloy is______________?

• 1. 10-12%
• 2. 0-6%
• 3. 13-30%
• 4. 20-30%

Question: What is the working time of amalgam?

• 1. One to two minutes
• 2. Three to four minutes
• 3. Five to six minutes
• 4. Seven to eight minutes

Question: Advantage of zinc containing amalgam is_______________?

• 1. Better handling property
• 2. Dimensional Stability
• 3. Resistance to creep
• 4. Toxicity to pulp and dentin

Question: Discolouration of silver alloy is due to_____________?

• 1. Tarnish
• 2. Tarnish and corrosion
• 3. Wet corrosion
• 4. Dry corrosion

Question: Moisture contamination of amalgam can lead to_____________?

• 1. Marginal breakdown
• 2. Shrinkage
• 3. Delayed expansion
• 4. increased stresses

Question: In a high copper amalgam the phase, which is eliminated is_______________?

• 1. Gamma 1
• 2. Gamma 2
• 3. Gamma 1 and 2
• 4. No phase is eliminated