Correct Answer:- Option B
‘Question83::What is the range of coating factor for medium coated electrodes 7
‏220نم‎ to 2.50
8:-1.60 to 2.20
೩.40 ಐ 2.50
०.1.25 to 1.30
Correct Answer: Option-C
Question84::What are the substances used to make the welds stronger ?
Ac Deoxidizers
B:-Gas forming substances
೦-5/80 forming substances
D:-Are stabilising substances
Correct Answer:- ೦೧000
Question85::Which size cutting nazzle is used for gas cutting 19 - 100 mm thickness plate ?
‏صم قميم‎
‏ممق‎ mm
CoL.2 mm
‏فليم‎ mm
Correct Answer:- Option-D
Question86::Which statement is/are correct about mild stee! electrode 7
i It contain silicon above 0.5%
i,t contain carbon 0.1 to 0.3%
ili, During welding the electrode will tend to get red got quickly
‘AcOnly i and il
B:-Only 1 and i
C-Only ii and i
D-All of the above i, ॥ 2೧ರ 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 6.79%
DCarbon 94.3% and Hydrogen 5.79%
Correct Answer: Option ®
Question88::Which statement is correct about the rightward welding techniques ?
i. The rightward technique 15 used to welding steel having thickness above 5 mm
ii. 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
കായി
B:-Only ॥ and iv
८001; i and ii
D-Only i
Correct Answer: Option-C
Question89:-In thermit welding, thermit is a mixture of
‏وميم‎ oxide and Aluminium
‏عماج يق‎ oxide and Aluminium
೦೦೧೫೫೦೦1 and Iron oxide
D-Charcoal, ron oxide and Aluminium
Correct Answer:- ೦೧000
Question90:-The straight line which bisecting two toe points is known as
‏7ھ‎ कार

നം of weld