Engineering :: Foundry Technology

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81.

First step in reclaiming the moulding and core sand is

A.	addition of moisture	B.	reproportioning of binder
C.	separation of metal particles	D.	any of the above

82.

Average amount of sand required in a foundry for making one tonne of casting is nearly

A.	0.1 tonne	B.	0.2 tonne
C.	2 tonnes	D.	20 tonnes

83.

Which of the following statement is correct?

Less sand is used per tonne of non-ferrous castings than for steel

More sand is used per tonne of non-ferrous castings than for steel

84.

Sand is broadly specified by

A.	grain size	B.	colour
C.	moisture content	D.	all of the above together

85.

The hardness of the mould is affected by the proportion of ingredients in the sand and

A.	the temperature	B.	refractoriness
C.	degree of ramming	D.	shape of particles

86.

Metal moulds are used in

A.	green sand moulding	B.	dry sand moulding
C.	loam moulding	D.	die casting process

87.

When bench moulding is adopted using three boxes, the central box is called

A.	cope	B.	cheek
C.	drag	D.	none of the above

88.

Sodium silicate in sand in often used as

A.	substitute of clay	B.	binder
C.	refractory material	D.	permeability promotion agent

89.

Which of the following process uses organic binder?

A.	Shell moulding	B.	Furan process
C.	Phenolic isocyanate process	D.	All of the above

90.

The advantage of shell moulding is

A.	Less sand requirement	B.	Process can be used for all cast metals
C.	Good accuracy of dimensions	D.	All of the above