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The tool used to draw lines on a chalk coated metal surface is called

(A) Wing compass (8) Trv square
(C) Steel rule (D) Scriber

It is a resistance welding process in which raller type electrodes are used ‏لاد‎
‎(A) Spot welding (8) Seam welding
(ल) Projection welding (D) Flash butt welding

Which of the following metal plates can not एर joined by projection welding ?
(ക) Thin plates (8) Copper plates
(C) Mild steel plates (D) Stainless steel plates

What is the purpose of copper coating on the mild steel filler wire ?
(5) To heat faster (8) To increase strength
)© To avoid rusting, (D) For good appearance

Which mechanical properties of metal give resistance to pulling force ?
(A) Toughness (8) Ductility (C) Hardness (D) Tensile strength

A key hole is to be maintained through out in the first run of butt joint to ensure :
(A) Crack free joint (8) Proper root penetration
(9) Proper bead width (D) Good reinforcement

Which of the following metal has highest thermal conductivity ?
(A) 20+ (8) Copper {C) Mild steel (D) Aluminum

Over heating of blow pipe nozzle to be avoided because it will cause
(ക) Flash back (8) Consume more gases
{C) Create undercut (D) Cause burn through

Oxvgen gas will change into liquid condition at _ _ ⋅
⊏⋀≖−↥⇂∄⋮⋅≋∘⊂ ∎⋮⊡−↿≊⊒⋅∘∘⊂ ⋢∊⋟−∐∥⋅⋅↗⊓⊂ ∎⋅∙∣⊃⊃−∏⊒⋅⊠⊔∁

150/2016 4 A