1
GATE PI 1989
Subjective
+2
-0
What is the velocity of the steel at the bottom of the sprue if the sprue height is $$30$$ $$cm$$? Assume the frictional and other losses to be $$20\%$$
2
GATE PI 1989
+5
-1.5
Molten aluminium was poured in a sand mold and the thickness of solid skin formed after $$20$$ seconds and $$50$$ seconds were fond to be $$3mm$$ and $$4.5mm$$ respectively. What would be the thickness of the solid skin at the end of $$100$$ seconds after pouring?
A
$$5.5mm$$
B
$$6.19mm$$
C
$$7.1mm$$
D
none
3
GATE PI 1989
Fill in the Blanks
+1
-0
In welding brass with oxy-acetylene flame, the type of flame used is
4
GATE PI 1989
+2
-0.6
In welding a mild steel sheet using an oxy-acetylene flame, the total amount of acetylene consumed was $$8.0$$ liters the oxygen consumption from the cylinder is
A
$$8.0$$ ltrs
B
$$16$$ ltrs
C
$$20$$ ltrs
D
$$24$$ ltrs
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