1
GATE PI 2003
MCQ (Single Correct Answer)
+1
-0.3
High speed electron beam welding is focused on the weld spot using
A
vacuum lens
B
inert gas lens
C
optical lens
D
magnetic lens
2
GATE PI 2003
MCQ (Single Correct Answer)
+1
-0.3
In resistance welding, heat is generated due to the resistance between
A
electrode and work piece
B
asperities between touching plates
C
two dissimilar metals being in contact
D
inter-atomic force s
3
GATE PI 2003
MCQ (Single Correct Answer)
+2
-0.6
A $$900$$ $$mm$$ long steel plate is welded by manual metal arc welding process using welding current of $$150$$ $$A,$$ arc voltage of $$20$$ $$V$$ and welding speed of $$300$$ $$mm/min.$$ If the process efficiency of is $$0.8$$ and surface resistance is $$36$$ micro-ohm, the heat input will be
A
$$600$$ $$J/mm$$
B
$$480$$ $$J/min$$
C
$$146$$ $$kJ$$
D
$$116$$ $$kJ$$
4
GATE PI 2003
MCQ (Single Correct Answer)
+2
-0.6
The cold cracking susceptibility of the heat affected zone in an arc weld is influenced by
$$P.$$ Entraped hydrogen,
$$Q.$$ Residual stresses
$$R.$$ Marternsitic transformation
$$S.$$ Slag inclusion
A
$$P,S$$
B
$$P,Q,S$$
C
$$P, Q, R$$
D
$$R,S$$
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
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CBSE
Class 12