1
GATE PI 2002
MCQ (Single Correct Answer)
+2
-0.6
A $$10$$ $$mm$$ thick steel bar is to be horizontally cast with two correctly spaced top risers of adequate feeding capacity. Assuming end effect without chill, what should be the theoretical length of the bar?
A
$$96$$ $$mm$$
B
$$132$$ $$mm$$
C
$$192$$ $$mm$$
D
$$156$$ $$mm$$
2
GATE PI 2002
MCQ (Single Correct Answer)
+2
-0.6
GATE PI 2002 Casting - Casting Process Question 6 English
A
$$P - 2,\,\,Q - 1,\,\,R - 3,\,\,S - 4$$
B
$$P - 1,\,\,Q - 3,\,\,R - 4,\,\,S - 2$$
C
$$P - 4,\,\,Q - 2,\,\,R - 2,\,\,S - 3$$
D
$$P - 3,\,\,Q - 4,\,\,R - 1,\,\,S - 1$$
3
GATE PI 2002
MCQ (Single Correct Answer)
+2
-0.6
In spot pulsed laser welding of aluminium plates (density $$ = 2700kg/{m^3},$$ specific heat $$=896J/kg,$$ melting temp $$=933K,$$ latent heat of melting $$ = 398\,\,kJ/kg)$$ at a temp of $${30^ \circ }C,$$ pulse with energy of $$0.5J$$ is focused onto an area of $$0.05m{m^2}.$$ If the entire energy is coupled into the material, what will be the depth of weld assuming the $$CS$$ area of the weld is circular and is uniform throughout its depth and only heat conduction in the direction of penetration
A
$$5.34mm$$
B
$$2.15mm$$
C
$$4.23mm$$
D
$$3.85mm$$
4
GATE PI 2002
MCQ (Single Correct Answer)
+2
-0.6
Two different tools $$A$$ and $$B$$ having nose radius of $$0.6mm$$ and $$0.33mm$$ respectively are used to machine $$C-45$$ steel employing feed rate of $$0.2$$ $$mm/rev$$ and $$0.1mm/rev$$ respectively. The tool that gives better finish and the value of ideal surface roughness are
A
Tool $$A$$ and $$4.166$$ $$\mu m$$ respectively
B
Tool $$B$$ and $$3.78$$ $$\mu m$$ respectively
C
Tool $$A$$ and $$8.333$$ $$\mu m$$ respectively
D
Tool $$B$$ and $$8.333$$ $$\mu m$$ respectively
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