63.

64.

65.

66.

220/23

Match List — | with List — II below :
List -I List - Il

P. Lost wax process a. Die casting
Q. Centrifugal casting b. Investment casting
R. Permanent mould casting c. Plaster of Paris
S. Plaster mould casting d. Rotating mould
P Q ಗಣ 5
4) © ५ boa
B) b a ५ ©
‏ط رہ‎ d 8 ©
D) d ௦ 0 8

Which of the following statements is/are false about sand casting ?

i. The intermediate mould section between cope and drag is known as cheek.
1. Cope refers to the lower half containing the bottom half of the pattern.
iii. Drag refers to the upper half containing the top half of the pattern.
iv. The proper design of tapered sprue is necessary to avoid aspiration effect.
A) iand iv only B) ii and iii only
C) i, ii and iii only D) none of these

Which statement is true about hot chamber die casting ?

A) In hot chamber die casting, the melting unit constitutes an integral part of the
process.

B) In hot chamber die casting, the mould is submerged in the molten metal.
C) In hot chamber die casting, the entire machine is heated.

D) In hot chamber die casting, the molten metal is brought and poured into the die
casting machine with the help of ladles.

Which statement is false about centrifugal casting ?

A) Centrifugal casting methods are classified as true-centrifugal casting, semi-
centrifugal casting and centrifuged casting.

B) They have more or less a symmetrical configuration on their outer contour.

C) To form the internal shape; pressure is generally obtained by compressed air
or hydraulically.

D) The use of gates, feeders and cores is eliminated, making the method less
expensive.