1
GATE PI 2009
+2
-0.6
A solid cylinder of diameter $$D$$ and height equal to $$D,$$ and a solid cube of side $$L$$ are being sand cast by using the same material. Assuming there is no super-heat in both the cases, the ratio of solidification times of the cylinder to the solidification time of the cube is
A
$${\left( {L/D} \right)^2}$$
B
$${\left( {2L/D} \right)^2}$$
C
$${\left( {2D/L} \right)^2}$$
D
$${\left( {D/L} \right)^2}$$
2
GATE PI 2008
+2
-0.6
In sand casting of hallow part of lead, a cylindrical core of diameter $$120mm$$ and height $$180mm$$ is placed inside the mould cavity. The densities of core material and lead are $$1600kg/{m^3}$$ and $$11300kg/{m^3}$$ respectively. The net force (in $$N$$) that tends to lift the core during pouring of molten metal will be
A
$$19.7$$
B
$$64.5$$
C
$$193.7$$
D
$$257.6$$
3
GATE PI 2007
+2
-0.6
In a sand casting process, a sprue of $$10mm$$ base diameter and $$250mm$$ height leads to a runner which fills a cubical mold cavity of $$100mm$$ size.

The mold filling time in seconds is

A
$$2.8$$
B
$$5.78$$
C
$$7.54$$
D
$$8.41$$
4
GATE PI 2007
+2
-0.6
In a sand casting process, a sprue of $$10mm$$ base diameter and $$250mm$$ height leads to a runner which fills a cubical mold cavity of $$100mm$$ size.

The volume flow rate (in $$m{m^3}/s$$) is

A
$$0.8 \times {10^5}$$
B
$$1.1 \times {10^5}$$
C
$$1.7 \times {10^5}$$
D
$$2.3 \times {10^5}$$
GATE PI Subjects
Fluid Mechanics
Metrology
Theory of Machines
Machine Tools and Machining
Industrial Engineering
Engineering Mechanics
Thermodynamics
Machine Design
Casting
Joining of Materials
Metal Forming
EXAM MAP
Medical
NEET