43.

44.

45,

46.

47,

48.

49.

50.

What is hot tears?
(A) depression or an internal void in a casting
(B) irregular cavities with a dark oxidised feature surface
(£) small gas holes either at the surface or just below the surface
(D) long vee depression that occurs in the flat surface of flat casings

Name the defects occurs only in grey cast iron with insufficient silicon :
(4) hard spot (B) scars
(¢) ஸம்‌ (D) hot tears

Name the casting defect which occurs due to the wearing or warping of moulding box :
‏بے‎ flashes (B) misrun
(0 6/00 (D) ഖേ

The major consideration for the casting design is :
(ക) the material to be melted
(B) the shape should allow directional solidification
(£) the selection of pattern material
(D) the permeability of moulding sand

Which material is good for casting?
(ക aluminium (18) steel
(C) magnesium (D) grey iron

Die casting is suitable for :
(മ) Grey cast iron (B) 21%
(0 56 (D) Bronze

Name the product which is not manufactured by die casting :

ക്ര toys + (8) instrument panel
(0) machine bed (D) bathroom fixtures
-

Which one is not the limitation of die casting?
(4) economical only for mass production
(B) only small parts can be made
(C) reduce mechanical property of the cast material
(7) only ferrous metal can cast

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