Heat Treatments 18

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Subject: Heat Treatments

ITI Trades MCQ: Fitter, Turner, Machinist

Part 18: List for questions and answers of Heat Treatments                                                             


Q1.During heat treatment when carbon is dissolved to form solid solution, it is known as 

a) Ferrite 

b) Pearlite 

c) Austenite 

d) Cementite 


Q2.What is the main purpose of annealing ? 

a) To improve machinability 

b) To improve magnetism 

c) To increase hardness 

d) To increase toughness 


Q3.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 


Q4.Which one of the following structures of steel is obtained due to the drastic cooling from the austenite structure? 

a) Pearlite 

b) Cementite 

c) Matensite 

d) Troostite 


Q5.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 


Q6.The toughness in a steel is increased and brittleness is decreased by a heat treatment operation called as 

a) Annealing 

b) Normalizing 

c) Tempering 

d) Case hardening 


Q7.To reduce internal stresses of a hardened tool, the method of heat treatment generally applied is 

a) Stabilising 

b) Annealing 

c) Normalizing 

d) Tempering 


Q8.Case Hardening is a method of producing hard skin on the surface of 

a) High-carbon steel parts 

b) Cast iron (heavy parts) 

c) Low-carbon steel parts 

d) Alloy steel parts 


Q9.A given component cracked after heat treatment. What can be the possible reason? 

a) It was heated for long time 

b) It was not properly cleaned before heating 

c) It was suddenly cooled in brine 

d) It was slowly cooled in air 


Q10.A carbon steel piece is heated just above 730° C, maintained at that temperature for a few hours and then slowly cooled. What heat treatment process is carried out ? 

a) Normalizing 

b) Casehardening 

c) Hardening 

d) Annealing 


Q11.The purpose of normalizing steel is to 

a) Remove induced stresses 

b) Improve machinability 

c) Soften the steel 

d) Increase the toughness and reduce brittleness


Q12. for the best result of annealing, the heated steel pice is cooled   

a) Slowely in the furnace itself by switching the heat supply off

b) By removing the piece from the furnace and allowing it to cool in opean air

c) By removing the piece from the furnace and placing it under a blast of air

d) By removing the piece from the furnace and dipping it in a tank containing water


Q13. A high speed steel has to be forged. Which colour indicates the most suitable forging temperature?

a) Light yellow

b) Dark cherry red 

c) white

d) yellow


Q14. Which term of the A.P.24, 21, 18 …… Is the first negative term? 

a) 8th 

b) 9th 

c) 10th 

d) 12th 


Q15. What is the largest two digit prime number? 

a) 96

b) 97

c) 98

d)  99


Part 18: List for questions and answers of Heat Treatments                                                             


Q1. Answer: c


Q2. Answer: a


Q3. Answer: d


Q4. Answer: c


Q5. Answer: c


Q6. Answer: c


Q7. Answer: d


Q8. Answer: c


Q9. Answer: c


Q10. Answer: d


Q11. Answer: a


Q12. Answer: a


Q13. Answer: d


Q14. Answer: c


Q15. Answer: b