Adequate mixing of mercury is indicated by_______________?

Related Mcqs:

1. The temperature (in °F) of the mixing slab for silicate cements should be_____________?

   A. 55 – 65
   B. 65 – 75
   C. 75 – 85
   D. 85 – 95

2. Frozen slab technique of mixing zinc phosphate is used for_______________?

   A. Cementing crowns
   B. Temporary dressing
   C. base
   D. cementing orthodontic bands

3. Model plaster (white) used to cast study models before mixing with water, is largely composed of____________?

   A. CaO
   B. CaCO3
   C. (CaSO4)2-½H2O
   D. CaSO4-2H2O

4. Silicate cement is indicated in________________?

   A. Mouth breathers
   B. Patients with high caries index
   C. In the restoration of posterior tooth
   D. None of the above

5. Crucible indicated for casting base metal alloys is______________?

   A. Carbon crucible
   B. Clay crucible
   C. Quartz crucible
   D. High melting plastic crucible

6. Use of dimethyl-P-toluidine is indicated for_______________?

   A. Thermal polymerization of acrylic
   B. Chemical polymerization
   C. Retarding the polymerization reaction
   D. To inhibit the action of benzoyl peroxide

7. Which of the following procedure is indicated to produce cross-linking in the polymerization of linear chains of acrylic_______________?

   A. Addition of grain refining agents
   B. Addition of difunctional monomers
   C. Increasing the amount of heat required for linear polymerization
   D. Incorporation of terminating agents

8. Mercury intoxication in dental office mainly results from____________?

   A. Direct contact with the mercury
   B. Inhalation of mercury vapours
   C. Ingestion of mercury
   D. None of the above

9. Absorption of mercury in the human body occurs least from_____________?

   A. Lungs
   B. Gastro-intestinal Track
   C. Skin
   D. Kidneys

10. Amalgam restorations give the best clinical service when the residual mercury content is_______________?

    A. 38-42%
    B. 48-52%
    C. 58-62%
    D. 68-72%