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

Related Mcqs:

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

   A. It has increased tensile and compressive strength
   B. It has poor tarnish and corrosion resistance
   C. It’s edge strength is greater
   D. Mercury content in the final restoration is less

2. Which of the following silver amalgam alloy have the maximum strength________________?

   A. Lathe cut
   B. Spherical
   C. Admixed
   D. Single composition

3. Discolouration of silver alloy is due to_____________?

   A. Tarnish
   B. Tarnish and corrosion
   C. Wet corrosion
   D. Dry corrosion

4. Over-trituration of silver alloy and mercury_______________?

   A. Reduces contraction
   B. Increases the strength of lathe cut alloy but reduces the strength of spherical alloy amalgam
   C. Decreases creep
   D. Gives al dull and crumbly amalgam

5. Which of the following statement is true regarding lathe cut low Copper silver alloy ?

   A. Requires least amount of mercury
   B. Achieves high compressive strength at 1 hr.
   C. Has tensile strength both at 15 minutes and 7 days is comparable to high copper, unicompositional alloys
   D. Has lower cree value

6. Increase in the residual mercury in silver amalgam filling can_____________?

   A. Cause fracture of the filling
   B. Tarnish and corrosion
   C. Increase the strength
   D. Decrease condensation pressure

7. The solid solution of silver and mercury is called_______________?

   A. y1
   B. y2
   C. B1
   D. y

8. Mercury rich condition in a slow setting amalgam alloy system in a resoration in______________?

   A. Accelerated corrosion
   B. Fracture of the restoration
   C. Merginal damage
   D. All of the above

9. According of ADA specification No or number 1, the minimum compressive strength for silver amalgam filling aftr one hour should be________________?

   A. 80 Mpa
   B. 140 Mpa
   C. 260 Mpa
   D. 510 Mpa

10. Stainless steel orthodontic wire can be hardened by________________?

    A. Tempering
    B. Work hardening
    C. Age hardening
    D. Precipitation hardening