1
GATE PI 1993
MCQ (Single Correct Answer)
+2
-0.6
During gas welding of copper sheets a neutral flame was used consuming $$8$$ liters of acetylene. But the weld was found to be defective. So it was re-welded using an oxidizing flame. The likely consumption of oxygen in liters will be
A
$$6$$
B
$$8$$
C
$$10$$
D
$$16$$
2
GATE PI 1993
Subjective
+5
-0
The voltage-arc length characteristics of a power source is $$V=20+40L,$$ where $$V=$$ operating voltage in volts and $$L=$$ arc length in $$cm.$$ The open circuit voltage and short circuit current for arc lengths ranging from $$3$$ to $$5mm$$ and current from $$400$$ to $$500$$ amps during welding operation are
3
GATE PI 1993
MCQ (Single Correct Answer)
+2
-0.6
In a cutting test with $$0.3mm$$ flank wear as tool failure criterion, a tool life of $$10min$$ was obtained at a cutting velocity of $$20m/min.$$ Taking tool life exponrent as $$0.25,$$ the tool life in minutes at $$40m/min$$ of cutting velocity will be
A
$$0.506$$
B
$$0.625$$
C
$$3.140$$
D
$$5.002$$
4
GATE PI 1993
MCQ (Single Correct Answer)
+2
-0.6
A work-piece of $$2000$$ $$mm$$ length and $$300$$ $$mm$$ width was machined by a planning operation with the feed set at $$0.3$$ $$mm/stroke.$$ If the machine tool executes $$10$$ double strokes/min, the planning time for a single pass will be
A
$$50$$ $$min$$
B
$$100$$ $$min$$
C
$$200$$ $$min$$
D
$$220min$$
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Medical
NEET
Graduate Aptitude Test in Engineering
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CBSE
Class 12