1
GATE PI 2002
+2
-0.6

$$P:$$ Influences the freezing range of the melt
$$Q:$$ Compensates the loss of fluidity of the melt
$$R:$$ Facilitates top feeding of the melt
$$S:$$ Avoids misrun

A
$$P, R$$
B
$$Q,S$$
C
$$R,S$$
D
$$P,S$$
2
GATE PI 2002
+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
$$156$$ $$mm$$
3
GATE PI 2002
+2
-0.6
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
$$P - 3,\,\,Q - 4,\,\,R - 1,\,\,S - 1$$
4
GATE PI 2002
+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
$$3.85mm$$
GATE PI Papers
2017
2016
2015
2014
2013
2012
2011
2010
2009
2008
2007
2006
2005
2004
2003
2002
2001
1995
1994
1993
1992
1991
1990
1989
EXAM MAP
Medical
NEET