1
GATE ME 2015 Set 1
MCQ (Single Correct Answer)
+1
-0.3
In a linear arc welding process, the heat input per unit length is inversely proportional to
A
welding current
B
welding voltage
C
welding speed
D
duty cycle of the power source
2
GATE ME 2015 Set 1
Numerical
+2
-0
A $$DC$$ welding power source has a linear voltage-current $$(V$$-$$I)$$ characteristic with open circuit voltage of $$80V$$ and a short circuit current of $$300A.$$ For maximum arc power, the current (in Amperes) should be set as _______________
Your input ____
3
GATE ME 2015 Set 1
Numerical
+1
-0
Under certain cutting conditions, doubling the cutting speed reduces the tool life to $${\left( {{1 \over {16}}} \right)^{th}}$$ of the original. Taylor’s tool life index $$(n)$$ for this tool workpiece combination will be ______________
Your input ____
4
GATE ME 2015 Set 1
Numerical
+2
-0
An orthogonal turning operation is carried out under the following conditions; rake angle $$ = {5^ \circ },$$ spindle rotational speed $$=400$$ $$rpm,$$ axial feed $$=0.4$$ $$m/min$$ and radial depth of $$cut = 5mm$$. The chip thickness, $${t_c},$$ is found to be $$3mm.$$ The shear angle (in degrees) in this turning process is ________________
Your input ____
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