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

Question: Well premeasured capsules of amalgam can release mercury vapour during_______________?

• 1. Mulling
• 2. Carving
• 3. Condensation
• 4. Trituration

Question: In spherical alloys as compared to lathe cut____________?

• 1. Less condensing force is required
• 2. More condensing force is required
• 3. Both require same condensing force
• 4. Manipulation is easy

Question: Chronic mercury toxicity results from_____________?

• 1. Ingestion while removing old amalgam
• 2. Skin contact
• 3. Mercury vapour
• 4. All of the above

Question: Increase in the residual mercury in silver amalgam filling can_____________?

• 1. Cause fracture of the filling
• 2. Tarnish and corrosion
• 3. Increase the strength
• 4. Decrease condensation pressure

Question: Which of the following statements about high copper silver alloy compared to conventional alloy is not true ?

• 1. It has increased tensile and compressive strength
• 2. It has poor tarnish and corrosion resistance
• 3. It’s edge strength is greater
• 4. Mercury content in the final restoration is less