Mechanical Engineering Questions And Answers :: Engineering Materials: part1



Mechanical Engineering : Engineering Materials QUESTIONS AND ANSWERS :: part1 : 6 to 10

Following Mechanical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2014 and IES 2014 examinations :

6.Which of the following represents the allotropic forms of iron

alpha iron, beta iron and gamma iron
alpha iron and beta iron
body centered cubic a-iron and face centered cubic a-iron
alpha iron, gamma from and delta iron
none of the above.

7.Ferromagnetic alpha iron exists in temperature range of

below 723�C
770 - 910�C
910-1440�C
1400-1539�C
above 1539�C.

8.Slow plastic defoliation of metals under a constant stress is known as

creep
fatigue
endurance
plastic deformation
non-plastic deformation.

9.The temperature at which ferromagnetic alpha iron transforms to paramagnetic alpha iron is

770�C
910�C
1050�C
below recrystallization temperature
above recrystallization temperature.

10.Mild steel belongs to the following category

low carbon steel
medium carbon steel
high carbon steel
alloy steel
special steel.

More Engineering Materials QUESTIONS AND ANSWERS available in next pages

    Health is the greatest gift, contentment is the greatest wealth -Buddha