In gas welding, the inclination of the blow pipe with respect to the plate in Leftward welding is-

Explanation:

Gas Welding methods

• There are two types of Welding methods
  1. Leftward welding  (forehand welding)
  2. Rightward welding (backhand welding)

Leftward welding

• The welding rod is held in the left hand and the blowpipe is held in the right hand.
• Leftward welding is used for the metal plate thickness up to 3 mm.
• Welding proceeds from right to left.
• It is also known as forwarding or forehand welding.
• The inclination of the welding rod with plate is 30° to 40° and the inclination of the blowpipe with plate is 60° to 70°.

Rightward welding

• Rightward welding is used for thicker plates and proceeds from left to right.
• The inclination of the welding rod is the same as in the leftward welding but the inclination of the blowpipe is 10° to 20° less than that in the leftward welding, i.e. at 40° to 50°. 
• It is also known as backward or backhand welding.