Bissoy.com
Doctors Medicines MCQs Q&A

Preheating is essential in welding

Preheating is essential in welding Correct Answer Cast iron

Preheating minimizes the temperature difference between the welding arc and the base material. .
Slowing the cooling rate also allows hydrogen to escape the weld puddle as it hardens to help minimize cracking.
preheating introduces the necessary heat into the weld area to ensure proper penetration.

Related Questions

Which of the following statement(s) is/are true regarding butt welding? 1. Flash butt welding is a combination of resistance, arc and pressure welding 2. Upset butt welding is used for welding rods 3. Percussion Welding is a self timing spot welding method 4. Aluminium alloys are flash welded
Which two of the following joining processes are autogenous? i. Diffusion welding ii. Electroslag welding iii. Tungsten inert gas welding iv. Friction welding
Preheating of work piece is essential in welding
Preheating prior to welding is done for the purpose of
Preheating before welding is done to
Which of the following materials necessitates preheating in welding?
In electric arc wire spray process, preheating of metal before welding is mainly done to prevent surface cracking.
Preheating of steel plate during welding is required to
In backhand welding, the angle between the welding rod and the work is ________ as compared to forehand welding.
In forehand welding, the angle between the welding torch and the work is ________ as compared to backhand welding.