Question: High strength amalgam is achieved by_____________?

• 1. Maximum matrix and minimum alloy phase
• 2. Minimum matrix and maximum alloy phase
• 3. Maximum matrix phase
• 4. Minimum alloy phase

Question: Once triturated, the Dental amalgam should be condensed with in_____________?

• 1. 5 minutes
• 2. 6 minutes
• 3. 3 minutes
• 4. 15 minutes

Question: The solid solution of silver and mercury is called_______________?

• 1. y1
• 2. y2
• 3. B1
• 4. y

Question: Advantage of minimum mercury technique or Eames technique is all Except________________?

• 1. High strength
• 2. Sets quickly
• 3. Needs no squeezing of excess mercury
• 4. Greater plasticity and adapts well to cavity walls

Question: Mercury rich condition in a slow setting amalgam alloy system in a resoration in______________?

• 1. Accelerated corrosion
• 2. Fracture of the restoration
• 3. Merginal damage
• 4. All of the above

Question: Over-trituration of silver alloy and mercury_______________?

• 1. Reduces contraction
• 2. Increases the strength of lathe cut alloy but reduces the strength of spherical alloy amalgam
• 3. Decreases creep
• 4. Gives al dull and crumbly amalgam

Question: Mercury intoxication in dental office mainly results from____________?

• 1. Direct contact with the mercury
• 2. Inhalation of mercury vapours
• 3. Ingestion of mercury
• 4. None of the above

Question: The threshold limit value of mercury exposures is_______________?

• 1. mg / m3
• 2. 0.05 mg / m3
• 3. mg / m3
• 4. mg / m3

Question: The tarnished layer of silver amalgam consists of________________?

• 1. Sulphides of silver
• 2. Oxides of tin
• 3. Chlorides of tin
• 4. All of the above

Question: Which phase provides maximum strength in hardened mercury/silver alloy ?

• 1. Silver / Mercury phase
• 2. Silver / Tin phase
• 3. Tin / Mercury phase
• 4. Zinc / Mercury phase