Correct Answer:- Option ®
Question83::What is the range of coating factor for medium coated electrodes ?
42.20 to 2.50
Br-1.60 to 2.20
೦೩.40 to 1.50
മാട to 1.30
Correct Answer:- Option-C
Question84::What are the substances used to make the welds stronger ?
‘Ac Deoxidizers
B:-Gas forming substances
C=Slag forming substances
D:-Are stabilising substances
Correct Answer:- Option-é
ಟಟ size cutting nazzle is used for gas cutting 19 - 100 mm thickness plate ಹ
ಸಿ08 ೧೫
8:24 ೬
CoL.2 mm
De1.6 mm
Correct Answer:- Option-D
Question86::Which statement is/are correct about mild stee! electrode ?
ict contain silicon above 0.5%
i,t contain carbon 0.1 to 0.3%
ili, During welding the electrode will end to get red got quickly
‘Ac Only i and il
B:-Only i and i
COnly ii and i
D-All of the above i, fiand ii
Correct Answer:- Option ®
Question87:-The percentage of carbon and hydrogen in acetylene gas is,
‘Carbon 91.3% and Hydrogen 8.79%
B:-Carbon 92.3% and Hydrogen 7.7%
C:Carbon 93.3% and Hydrogen 6.73%
DCarbon 94.3% and Hydrogen 5.79%
Correct Answer:- Option ®
Question88::Which statement is correct about the rightward welding techniques ?
i. The rightward technique is used to welding steel having thickness above 5 mm
i The rightward technique is used to welding steel having thickness up to 5 mm
ili, There is more heat concentration for fusion, and hence useful for welding thick jobs
iv. There is less heat concentration for fusion, and hence useful for welding thin jobs
೦೧/1
B:-Only ii and iv
C-Only i and ii
D-Only i
Correct Answer:- Option-C
Question89:-In thermit welding, thermit is a mixture of
‘Aclron oxide and Aluminium
B:-Zinc oxide and Aluminium
CCharcol and Iron oxide
DCharcoal, ron oxide and Aluminium
Correct Answer:- Option-é
Question90:-The straight line which bisecting two toe points is known as
ATs line

നം of weld