ITI Heat Treatment Objective Questions and Answers - ObjectiveBooks

ITI Heat Treatment Objective Questions and Answers

Practice Test: Question Set - 03


1. Which one of the following processes by which steel is heated to the required temperature and then cooled slowly in the furnace itself?
    (A) Tempering
    (B) Hardening
    (C) Nitriding
    (D) Annealing

2. Which one of the following quenching media is used for hardening H.S.S. tool?
    (A) Water
    (B) Brine solution
    (C) Oil
    (D) Soda water

3. What is the hardening temperature for H.S.S. tool?
    (A) 1250°C
    (B) 950°C
    (C) 850°C
    (D) 750°C

4. Which one of the following is the purpose of tempering a hardened steel component?
    (A) To increase toughness
    (B) To increase ductility
    (C) To increase hardness
    (D) To reduce hardness

5. While normalizing the steel should be cooled
    (A) In still air to room temperature
    (B) In oil
    (C) By forced air
    (D) In water

6. During heat treatment when carbon is dissolved to form solid solution, it is known as
    (A) Ferrite
    (B) Pearlite
    (C) Austenite
    (D) Cementite

7. The process of producing a component with tough and ductile core and a hard outer surface is known as
    (A) Hardening
    (B) Case Hardening
    (C) Tempering
    (D) Annealing

8. The process of heating steel to about 40°C above the upper critical temperature and cooling it in still air to room temperature is known as
    (A) Hardening
    (B) Annealing
    (C) Normalizing
    (D) Tempering

9. Which one of the following heat treatment processes produces a scale-free surface on the component?
    (A) Flame hardening
    (B) Case hardening
    (C) Nitriding
    (D) Induction hardening

10. In heat treatment process annealing is done to
    (A) Increase the toughness
    (B) Increase the softness
    (C) Increase the hardness
    (D) Increase the brittleness

11. Which one of the following processes is adopted to improve the internal structure of steel, which has been subjected to severe hammering?
    (A) Hardening
    (B) Annealing
    (C) Normalizing
    (D) Tempering

12. The process of increasing carbon percentage on the surface of Low-carbon steel is known as
    (A) Hardening
    (B) Nitriding
    (C) Carburizing
    (D) Tempering

13. For annealing hypoeutectoid steel according to the carbon content, it should be heated to
    (A) 30°C to 50°C above the lower critical point
    (B) 30°C to 50°C above the upper critical point
    (C) 600°C to 630°C
    (D) 1000°C to 1030°C

14. Liquid carburizing is done in a heated salt bath. Which one of the following is not a carburizing salt?
    (A) Sodium carbonate
    (B) Sodium sulphate
    (C) Sodium cyanide
    (D) Barium chloride

15. To reduce internal stresses of a hardened tool, the method of heat treatment generally applied is
    (A) Stabilizing
    (B) Annealing
    (C) Normalizing
    (D) Tempering

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