1.Skin effect is observed during a. Flame hardening b. Induction hardening c. Laser hardening d. Nitriding
Ans a
2.Which of the following is diffusion controlled? a. Dislocation climb b. Cross slip c. Twinning d. Recrystallization
Ans : D
3.Which of the following is not a ferrite stabilizer? a. V b. Mn c. Mo d. Cr
Ans b
4.Which one of the following sets of constituents is expected in equilibrium cooling of a hyper-eutectoid steel from austenitic state? a. Cementite and pearlite b. Ferrite and pearlie c. Ferrite and bainite d. Martensite and cementite.
Ans a

5.Heat treatment that requires heating a part below A1 temperature, i.e. between 550°C and 650° is called as a. Homogenizing annealing b. Normalizing c. Process annealing d. Full annealing ans c
6.Which of the following statement is wrong? a. The spheroidising process is usually applied to high carbon tool steels which are difficult to machine b. none of the above c. In spheroidising process, the cementite in the granular form is produced in the structure of steel d. The annealing process causes complete recrystallisation in steels which have been severely cold worked and a new grain structure is formed .
Ans b

7.A steel is heated at about 875° C where the structure consists of entirely austenite. It is then cooled suddenly at a temperature of about 250° C to 525° C. This process of heat treatment is known as a. Normalizing b. Austempering c. Annealing d. Martempering
Ans b
8.A small percentage of Boron is generally added to steel a. To increase wear resistance b. To increase hardenability c. To reduce machinability d. To increase endurance strength
Ans b
9.which of the following shifts the TTT curve to the right? a. B b. Co c. Cu d. N
Ans a