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%

Percentage of tin in low copper alloy is______________? A. 30-35%B. 26-28% C. 13-32% D. 22-30%

Cause of expansion in zinc containing amalgam is_____________? A. Zinc and water B. WaterC. Hydrogen D. Nascent oxygen

What is common in amalgam and ceramics ? A. More compressive strength but less tensile strengthB. More compressive strength and tensile strength C. Less compressive strength but more tensile strength D. Less compressive strength and tensile strength

Which of the following constituents of amalgam alloy decreases expansion____________? A. Copper B. Zinc C. SilverD. Tin

The higher the Hg alloy ratio in dental amalgam________________? A. Higher the strength B. Lower the creep valueC. More matrix matrial formed D. More gamma 1 phase formed

Ag-Cu eutectic alloy has a characteristic Property of that fusion temp of_____________? A. The resultant alloy is greaterB. The resultant alloy is lesser C. The resultant alloy varies according to the content of Ag of Cu D. None of the…

What is the recommended for condensation of dental amalgam ? A. 35 poundsB. 3 pounds C. 15 lb D. 25 lb

Which is not true about high copper amalgam alloys______________? A. Low tensile and compressive strength B. Low Hg: Alloy ratio C. High tensile strength D. Low creep

Amalgam means_____________? A. A metallic powder composed of silver, tin, copper and zincB. An alloy of two or more metals one of which is mercury C. An alloy of two or more metals that have been dissolved in each other…