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

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 greatest stress which may be produced in a material such that stress is directly proportional to the strain is know as_____________?

   A. The elastic limit
   B. The proportional limit
   C. The yield strength
   D. Modulus of elasticity

3. 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

4. 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

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

   A. Vickers’s hardness number
   B. Knoop hardness number
   C. Brinell hardness number
   D. Rockwell hardness number

6. The material used in its pure form in dentistry is______________?

   A. Composite
   B. Silver
   C. Gold
   D. Amalgam

7. Anterior limit of infratemporal fossa is______________?

   A. Lateral pterygoid plate
   B. Maxillary posterior wall
   C. Pterygomaxillary fissure
   D. Mastiod process

8. During a routine checkup a 70 year old male is found to have Serum Alkaline Phosphatase three time the upper limit of normal. Serum Calcium, Serum Phosphorous and liver function tests are normal. The most likely diagonsis is______________?

   A. Primary hyperparathyroidism
   B. Paget’s disease of the bone
   C. Osteomalacia
   D. Metastatic bone disease

9. A fluid having constant viscosity that does not depend upon the strain rate is said to be_______________?

   A. Viscoelastic
   B. Pseudoplastic
   C. Plastic
   D. Newtonian

10. Strain is defined as_____________?

    A. An applied load or force
    B. A deformation resulting from an applied load
    C. An external force opposing an applied load
    D. An internal force opposing an applied load