Which of the following physical property can be used to estimate indirectly the proportional limit of gold alloys ?

Related Mcqs:

1. A restorative material which has a high proportional limit, compared with one with a lower proportional limit would have________________?

   A. Greater ductility B. Greater toughness C. A higher modulus of elasticity D. A higher modulus of elasticity E. More resistance to permanent deformation...

2. The castability of chromium-cobait base metal alloys when compared to gold based noble metal alloys is_______________?

   A. More B. Less C. Equal D. Depends on the alloy type...

3. In type II gold alloys _______ Karat gold is used?

   A. 24 K B. 22 K C. 18 K D. 10 K...

4. Which of the following cast gold alloys is used for fabricating partial denture frameworks______________?

   A. Type I – Soft B. Type II – Hard C. Type III – Hard D. Type IV – Extra Hard...

5. Reduction in the fusion temperature of dental gold casting alloys is caused by presence of______________?

   A. Platinum B. Copper C. Silver D. Gold...

6. Nickel is added to wrought gold alloys as______________?

   A. Strengtherner B. Hardener C. Whitens the alloy D. Scavenger...

7. The gold alloys used for casting contain at least…. percent of precious metal according to ADA specification number 5________________?

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

8. A material behaves in certain ways above and below the proportional limit on a stress strin curve, which of the following is correct______________?

   A. Above the proportional limit a material function in a plastic manner, while below the proportional limit it behaves as an elastic B. Above the proportional limit a material functions in an elastic manner, while below the proportional limit it behaves as an plastic C. Either A or B D. Neither A or B...

9. The proportional limit is defined as______________?

   A. The maximum stress in a structure B. The minimum force required to cause a structure to break C. The maximum stress that can be induced without permanent deformation D. The maximum elongation under tension that can be measured before failure...

10. The strain that occurs when a material is stressed to its proportional limit is______________?

    A. Resilience B. Maximum flexibility C. Toughness D. Elastic limit...