GATE-Level Heat Treatment MCQs

Which heat treatment process is used to soften hardened steel?

• Hardening

• Normalizing

• Tempering

• Quenching

Which process removes internal stresses developed during cold working?

• Spheroidising

• Full Annealing

• Stress Relief Annealing

• Carburizing

Which heat treatment produces a fine-grained pearlitic structure by heating above critical temperature and cooling in still air?

• Annealing

• Tempering

• Hardening

• Normalizing

The process of converting coarse cementite into rounded globules is called:

• Normalizing

• Spheroidising

• Austempering

• Martempering

What does the Jominy end quench test measure?

• Toughness

• Hardness

• Hardenability

• Ductility

Which of these is NOT a surface hardening method?

• Carburizing

• Nitriding

• Normalizing

• Cyaniding

Which heat treatment uses a salt bath for isothermal transformation?

• Austempering

• Carburizing

• Normalizing

• Quenching

Which treatment uses high-frequency current to harden the surface?

• Carburizing

• Induction Hardening

• Austempering

• Annealing

In CCT diagrams, which cooling rate will result in martensite formation?

• Very slow cooling

• Furnace cooling

• Rapid quenching

• Air cooling

Which diagram represents phase changes during continuous cooling?

• TTT diagram

• Isothermal diagram

• CCT diagram

• Lever rule diagram