A form of stress corrosion failure termed as ‘season cracking’ is generally observed in __________________?

Related Mcqs:

1. Brass parts with high residual tensile stress at the surface are susceptible to season cracking (i.e. spontaneous cracking occuring on exposure to atmospheric corrosion), if its zinc percentage is more than ?

   A. 5
   B. 10
   C. 20
   D. 35

2. According to maximum shear stress failure criterion, yielding in material occurs, when the maximum shear stress is equal to _______________ times the yield stress ?

   A. 0.5
   B. 2
   C. √2
   D. √3/2

3. The maximum stress below which a material can withstand an infinite number of cycle of stress, is termed as the________________?

   A. Fatigue strength
   B. Creep strength
   C. Resilience
   D. Endurance limit

4. The ratio of the shear stress to the principal stress on a principal plane is______________________?

   A. 0
   B. 1
   C. 1/2
   D. 1/3

5. Factor of safety in machine design is defined as the ratio of ultimate stress to _____________ stress ?

   A. Working
   B. Bearing
   C. Yield
   D. None of these

6. A fluid is termed as the Newtonian fluid, when the shear stress is _________________ the velocity gradient ?

   A. Independent of
   B. Inversely proportional to
   C. Directly proportional to
   D. None of these

7. The behaviour of a metal specimen, which when plastically strained in tension reduces its yield stress in compression and vice versa; is termed as the_______________?

   A. Work hardening
   B. Bauschinger effect
   C. Creeping effect
   D. Stress recovery effect

8. The stress at which extension of the material takes place more rapidly as compared to the increase in load is termed as the _____________ point of the material?

   A. Elastic
   B. Ultimate
   C. Yielding
   D. Breaking

9. Cold cracking in the heat affected zone of a high strength steel weld can take place because of the___________________?

   A. Retained austenite
   B. Martensite formation
   C. Relatively high sulphur content in the base metal
   D. Sufficient hydrogen present in the welding arc

10. Corrosion is____________________?

    A. A physical phenomenon
    B. A chemical phenomenon
    C. Same as erosion
    D. An uncontrollable phenomenon