Which of the following is the most elastic material ?

Related Mcqs:

1. All materials obey Hooke’s law within elastic limit. When elastic limit is reached, the tensile strain__________________?

   A. Increases very quickly
   B. Decreases very quickly
   C. Increases in proportion to stress
   D. Decreases in proportion to stress

2. The ability of a material to absorb energy in the elastic range is a measure of its __________________?

   A. Toughness
   B. Resilience
   C. Malleability
   D. Brittleness

3. The behaviour of visco-elastic material is time dependent. This behaviour is common in _____________ materials?

   A. Non-crystalline solid
   B. Crystalline
   C. Rubbery
   D. Non-crystalline organic polymeric

4. Non-ferrous metals and hard steels do not exhibit a definite yield point, when pulled in the testing machine and hence for these cases, a better measure of their elastic properties is defined by the ______________ stress?

   A. Ultimate
   B. Yield point
   C. Proof
   D. None of these

5. Visco-elastic behaviour of materials which is time dependent is common in______________?

   A. Plastics
   B. Crystalline solid
   C. Non-crystalline solids
   D. Non-crystalline organic polymer

6. An elastic behaviour of materials is expressed in terms of_______________?

   A. Hysteresis loop area
   B. Stress-strain curve
   C. Relaxation time
   D. None of these

7. Failure of a material is termed as fatigue failure, if it fails below the yield point. The resistance to fatigue failure of a material is measured by the__________________?

   A. Ultimate tensile strength (U.T.S.)
   B. Endurance limit
   C. Elastic limit
   D. None of these

8. Which of the following is the most suitable material of construction for evaporator & its tubes for concentrating NaOH solution to 70% ?

   A. Cast iron
   B. Steel
   C. Nickel
   D. Karbate

9. Which of the following is the softest material ?

   A. Quartz
   B. Calcite
   C. Corundum
   D. Fluorite

10. The malleability of a material is the property by virtue of which it can be rolled or hammered into thin sheets. Which of the following materials has the maximum malleability ?

    A. Lead
    B. Copper
    C. Aluminium
    D. Wrought iron