1
GATE PI 1995
True or False
+1
-0
Shell molding is an investment casting process $$(T/F)$$
A
TRUE
B
FALSE
2
GATE PI 1994
True or False
+1
-0
Bentonite is commonly used bonding material for dry sand cores
A
TRUE
B
FALSE
3
GATE PI 1992
MCQ (Single Correct Answer)
+1
-0.3
The primary function of a riser is to
A
feed molten metal to casting as it solidifies
B
prevent atmospheric air from contaminating the metal in the mold
C
allow gases to easily escape from mold cavity
D
allow molten metal to rise above the mold cavity
4
GATE PI 1992
Fill in the Blanks
+1
-0
Investment casting uses ......... (wax / resin coated sand) as pattern material and is preferred for small parts with ................. (simple/intricate) designs