The ultimate tensile strength of low carbon steel by working at a high strain rate will_________________?

Related Mcqs:

1. The ultimate tensile strength and yield strength of most of the metals, when temperature falls from 0 to l00°C will _________________?

   A. increase
   B. decrease
   C. remain same
   D. first increase and then decrease
   E. show unpredictable behaviour

2. The percentage of carbon in low carbon steel is__________________?

   A. 0.05%
   B. 0.15%
   C. 0.3%
   D. 0.5%
   E. 0.7%.

3. High carbon steel carries carbon %age c_________________?

   A. 0.1 to 0.3%
   B. 0.3 to 0.6%
   C. 0.6 to 0.8%
   D. 0.8 to 1.5%
   E. 1.5 to 2.5%.

4. Tensile strength of steel can be safely in-creased by________________?

   A. adding carbon up to 2.8%
   B. adding carbon up to 6.3%
   C. adding carbon up to 0.83%
   D. adding small quantities of copper
   E. adding copper and carbon

5. The tensile strength of wrought iron is maximum _________________?

   A. along the lines of slag distribution
   B. perpendicular to lines of slag distribution
   C. uniform in all directions
   D. unpredictable
   E. none of the above

6. The loss of strength in compression with simultaneous gain in strength in tension due to overloading is known as________________?

   A. hysteresis
   B. creep
   C. visco elasticity
   D. Boeschinger effect
   E. inelasticity

7. The m.e.p. of a diesel cycle having fixed compression ratio with increase in cut-off will_________________?

   A. increase
   B. decreae
   C. be unaffected
   D. depend on other factors
   E. unpredictable

8. In petrol engine using a fixed octane rating fuel and fixed compression ratio, super charging will_________________?

   A. increase the knocking tendency
   B. decrease the knocking tendency
   C. not affect the knocking tendency
   D. increase or decrease knocking tendency depending on strength and time of spark
   E. unpredictable

9. A bucket of water is hanging from a spring balance. An iron piece is suspended into water without touching sides of bucket from another support. The spring balance reading will_________________?

   A. increase
   B. decrease
   C. remain same
   D. increase/decrease depending on depth of immersion
   E. unpredictable

10. Water at pressure of 4 kg/cm2 and 160°C temperature when exposed to atmosphere will_________________?

    A. boil
    B. flash i.e. get converted into steam
    C. remain as it was
    D. cool down
    E. none of the above