1
GATE PI 2005
MCQ (Single Correct Answer)
+1
-0.3
An expandable pattern is used in
A
slush casting
B
squeeze casting
C
centrifugal casting
D
investment casting
2
GATE PI 2005
MCQ (Single Correct Answer)
+2
-0.6
The shape factor for a casting in the form of an annular cylinder of outside diameter $$30$$ $$cm,$$ inside diameter $$20$$ $$cm$$ and height $$30$$ $$cm$$ (correction factor $$k=1.0$$) will be
A
$$21.77$$
B
$$6.28$$
C
$$9.42$$
D
$$12.28$$
3
GATE PI 2005
MCQ (Single Correct Answer)
+2
-0.6
A cast steel slab of dimension $$30 \times 20 \times 5\,\,cm$$ is poured horizontally using a side riser. The riser is cylindrical in shape with diameter and height, both equal to $$D.$$ The freezing ratio of the moulds is
A
$$8D/75$$
B
$$4D/75$$
C
$$75/8D$$
D
$$75/4D$$
4
GATE PI 2005
MCQ (Single Correct Answer)
+1
-0.3
The eigen values of the matrix $$M$$ given are $$15, 3, $$ and $$0.$$
$$M = \left[ {\matrix{ 8 & { - 6} & 2 \cr { - 6} & 7 & { - 4} \cr 2 & { - 4} & 3 \cr } } \right],$$ the value of the determinant of a matrix is
A
$$20$$
B
$$10$$
C
$$0$$
D
$$-10$$
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