571. 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

572. Creep value of which of the following is the highest ?

A. Low copper amalgam alloy
B. Admix alloy
C. Single composition alloys
D. Creep value of all the above mentioned alloys is same

573. Amalgam achieves 70% of the strength by____________?

A. hours
B. 4 hours
C. 8 hours
D. 16 hours

574. Amalgam achieves 70% of the strength by____________?

A. hours
B. 4 hours
C. 8 hours
D. 16 hours

575. Ag-Cu eutectic alloy has a characteristic Property of that fusion temp of_____________?

A. The resultant alloy is greater
B. The resultant alloy is lesser
C. The resultant alloy varies according to the content of Ag of Cu
D. None of the above

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

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

577. 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

578. Amalgam means_____________?

A. A metallic powder composed of silver, tin, copper and zinc
B. 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 in the molten state
D. A metallic substances in powder or tablet from that is mixed with mercury

579. In amalgam alloy which acts as oxygen scavenger_____________?

A. Cu
B. Zn
C. Pd
D. Ag

580. By increasing the percentage of which metal, the strength and hardness of amalgam increases_____________?

A. Ag
B. Zn
C. Cu
D. Hg

NOTE
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