WEEK 30

Ques 1. Choose which is not method of heat treatment.

(a) Direct Preheating

(b)Indirect preheating

(c) Perfect Preheating

(d) Local Preheating

Ques 2. For Preheating of Copper & Copper Alloys maximum temperature should be-

(a)   500°C

(b)  300°C

(c)   200°C

(d)  100°C

 Ques 3. The preheating temperature can be checked by-

    (a) temperature indicating crayons.

  (b) Pressure indicating crayons.

  (c) Altitude indicating crayons.

  (d) Volume indicating crayons.

   Ques 4. Post heating means that the part is heated

(a) immediately before welding

(b) immediately after welding

(c) During welding

(d) 3 hours after welding

Ques 5. Annealing involves heating metal to a temperature above the critical point of and allowing it to

(a) Instant heating

(b)Instant cooling

(c)cool slowly

(d) cool fastly

Ques 6. Explain different methods of Heat treatment.

Ques 7.What is Post Heating?

Ques 8.Explain Pre Heat treatment and Post Weld Heat Treatment.

Ques 9. Define Soaking time, cooling and Tempering.

Ques 10.What are the use of temperature indicating Crayons.