69.

70.

73,

72:

73.

74,

75.

76.

Which statement is correct regarding investment casting?
(A) intricate details cannot cast
(B) unmachinable alloys cannot cast
(C) more than one casting cannot cast at a time

(D) limitation in usge of core and location of holes

‘What is shake out operation?
(ಗಿ) freeing the casting from the mould (18) removing the core from the mould

(0 removal of gates from mould (D) removal of riser from mould

Which furnace is not used for casting?
(ಗಿ) cupola furnace (ए) blast furnace
(0 erucible furnace (D) electric are furnace

‘Which one is not a factor for selecting the furnace?
(ಗೆ) capacity of molten metal (B) method of pouring
(C) economics of melting (D) shape of mould

Riddle is used for :
(ಗಿ) moistening the sand around the edge before removing pattern
(8) repairing and finishing the mould
(C) cleaning the moulding sand
(D) reinforcement of sand in the tap part of moulding box

The property of sand due to which the sand particles stick together is called :
(2) adhesiveness (B) cohesiveness
(©) collapsibility (D) permeability

In a three piece pattern the top box named as :
(ಯ) drag (ए) கன
(0) றக (D) none of the above

Which one is an inorganic binder?
(^) fire clay (18) wood floor
(C) resins (D) plastics

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