Co-efficient of Thermal exansion of amalgam is______________?

Related Mcqs:

1. For dental amalgam, the elastic modulus and tensile strength is______________?

   A. 40 Gpa and 60 – 100 Mpa
   B. 21 Gpa and 27 – 55 Mpa
   C. 350 Gpa and 10 – 120 Mpa
   D. 360 Gpa and 125 – 130 Mpa

2. In non zinc containing dental amalgam alloy the percentage of zinc present is______________?

   A. Less than 0.02%
   B. Less than 0.1%
   C. Less than 0.01%
   D. None of the above

3. Co-efficient of thermal expansion is highest for_____________?

   A. Amalgam
   B. Silicate cement
   C. Gold alloy
   D. Acrylic resin

4. Which of the following phases of dental amalgam has minimum strength____________?

   A. Gamma 1
   B. Gamma 2
   C. Epsilon 1
   D. Gamma 3

5. Well premeasured capsules of amalgam can release mercury vapour during_______________?

   A. Mulling
   B. Carving
   C. Condensation
   D. Trituration

6. How soon after a moisture contamination does a zinc containing amalgam alloy start expanding________________?

   A. 24 hours
   B. 1-2 days
   C. 3-5 days
   D. 7 days

7. Once triturated, the Dental amalgam should be condensed with in_____________?

   A. 5 minutes
   B. 6 minutes
   C. 3 minutes
   D. 15 minutes

8. Cavo surface angle for amalgam resoration is butt joint as____________?

   A. It increases compresssive and tensile strengths
   B. Decreased compressive, increased strength
   C. Decreased compressive, decrease tensile strength
   D. Increased compressive, increased tensile strength

9. What is the recommended for condensation of dental amalgam ?

   A. 35 pounds
   B. 3 pounds
   C. 15 lb
   D. 25 lb

10. Finishing and polishing of Amalgam make the restoration______________?

    A. Increase in tarnish and corrosion resistance
    B. Increase the marginal strength
    C. Decrease the tarnish and corrosion resistance
    D. Increased compressive strength