In a tensile test on mild steel specimen, the breaking stress as compared to ultimate tensile stress is_________________?

Related Mcqs:

1. The ultimate tensile stress of mild steel compared to ultimate compressive stress is__________________?

   A. same
   B. more
   C. less
   D. more or less depending on other factors
   E. unpredictable

2. During a tensile test on a specimen of 1 cm cross-section, maximum load observed was 8 tonnes and area of cross-section at neck was 0.5 cm2. Ultimate tensile strength of specimen is___________________?

   A. 4 tonnes/cm2
   B. 8 tonnes/cm2
   C. 16 tonnes/cm2
   D. 22 tonnes/cm2
   E. none of the above

3. The percentage reduction in area of a cast iron specimen during tensile test would be of the order of_________________?

   A. more than 50%
   B. 25—50%
   C. 10—25%
   D. 5—10%
   E. negligible

4. For steel, the ultimate strength in shear as compared to in tension is nearly _________________?

   A. same
   B. half
   C. one-third
   D. two-third
   E. one-fourth

5. In the tensile test, the phenomenon of slow extension of the material, i. e. stress increasing with the time at a constant load is called_____________?

   A. creeping
   B. yielding
   C. breaking
   D. plasticity
   E. none of the above

6. The stress developed in a material at breaking point in extension is called_________________?

   A. breaking stress
   B. fracture stress
   C. yield point stress
   D. ultimate tensile stress
   E. proof stress

7. The stress developed in a material at breaking point in extension is called__________?

   A. Breaking stress
   B. Fracture stress
   C. Yield point stress
   D. Proof stress

   Submitted by: Faheem Zaman Dhaunroo

8. The value of modulus of elasticity for mild steel is of the order of________________?

   A. 2.1xl05 kg/cm2
   B. 2.1 X 106 kg/cm2
   C. 2.1 x 107 kg/cm2
   D. 0.1 xlO6 kg/cm2 (<?) 3.8 x 106 kg/cm2

9. A thin mild steel wire is loaded by adding loads in equal increments till it breaks. The extensions noted with increasing loads will behave as under_________________?

   A. uniform throughout
   B. increase uniformly
   C. first increase and then decrease
   D. increase uniformly first and then increase rapidly
   E. increase rapidly first and then uniformly

10. Tensile strength of a material is obtained by dividing the maximum load during the test by the_________________?

    A. area at the time of fracture
    B. original cross-sectional area
    C. average of A. and B.
    D. minimum area after fracture
    E. none of the above.