(A) melting pot is separate from the machine.
(B) melting pot is an integral part of the machine.
(C) melting pot may have any location.
(D) high temperature and pressure is used.
WBPSC-ME-JE-2018
The casting method adopted for ornaments and toys of non-ferrous alloys, is
(A) permanent mould casting
(B) slush casting
(C) die casting
(D) centrifugal casting
In die casting, machining allowance is
(A) small
(B) large
(C) very large
(D) not provided
A jolt machine is used to
(A) ram the sand harder at the pattem face with
decreasing hardness towards the back ofthe
mould.
(B) ram the sand harder at the back ofthe mould
and softer on the pattem face.
(C) produce uniform sand hardness throughout
the mould.
(D) produce uniform packing of sand in the
mould.
Swab is used for
(A) smoothing and cleaning out depressions in
the mould.
(B) cleaning the moulding sand.
(C) moistening the sand around the edge before
removing pattern.
(D) reinforcement of sand in the top part of the
moulding box.
Chills are used in casting moulds to
(A) achieve directional solidification.
(B) reduce blow holes.
(C) reduce the freezing time.
(D) increase the smoothness of the casting
surface.
When a mould is made in three parts, the top part, is known as a
(A) drag
(B) cheek
(C) cope
(D) None ofthe above
Aluminium is the best malerial for making pattems because it is
(A) light in weight
(B) easy to work
(C) corrosion resistant
(D) All of the above
Metal pattems are used for
(A) small castings
(B) large castings
(C) complicated castings
(D) large scale production of castings