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Which type of flame is used to weld brass ?
(A) Air acetvlene flame (8) னல flame

(€) Oxidizing flame (0) Carburizing flame

What is the maximum thickness of MS sheet that can be weld in leftward technique ?

(A) 12 mm (ए) 8mm (C) 10 mm () 5mm

The angle of blow pipe to the line of weld in leftward welding technique is :
(ക) 405 - 50° (8) 50-60 © 60-70 യു 707 - 8೩0

Copper should not be used in acetylene gas piping because ;

(A) Copper react with acetylene and form explosive compound
(8) Copper is weak metal

(C) Acetvlene cannot compressed

(D) Copper has high expansion

The greatest amount of heat is produced in an oxyacetylene flame at ‏ے‎

ക] 1೧೮೯ ೧೧೧೯ (8) Outer envelope
‏٦‎ ) 0

(C) The out let tip of nozzle (12) Tust ahead of inner cone

Purpose of fitting a hose protectoristo ய
(ಮಿ) Permit the gas to flow from blow pipe to cylinder
(8) Avoid return flow of gas to cylinder

)© Permit the gas flow in both directions

(1) Avoid gas flow to blow pipe

The maximum pressure of acetylene gas that can be compressed in a cylinder :

(வி 1 kg/em? 18) 15 kg/cm? )© 100 kg/em? (0) 150 kg/cm?

The function of gas regulatoris ‏م‎
‎(५) To get different tvpe of flame (8) To mix both gases

{€) To change temperature {D) To set working pressure

7 150/2016
(7.1.0.