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111.

Sprues are generally

A.	uniform size	B.	tapered downwards
C.	tapered upwards

112.

The design of gate should be such as to

A.	avoid erosion of cores and mould cavity	B.	prevent scum, slag and eroded sand particles from entering the mould cavity
C.	minimize turbulence and dross formation	D.	all of the above

113.

Which of the following defect may occur due to improper design of gating system?

A.	Cold shuts	B.	Rough surfaces
C.	Misruns	D.	any of the above

114.

High pouring rate leads to

A.	mould erosion	B.	rough surface
C.	excessive shrinkage	D.	any of the above

115.

Which of the following defect is likely to occur due to improper design of gatting system?

A.	Shrinkage	B.	Porosity
C.	Mould erosion	D.	any of the above

116.

Shell moulding is a process in which

A.	a thin shell is cast in sand mould	B.	a strong core is prepared
C.	a mould comprising thin shell is produced by mixing dry silica and resin binder

117.

Of the following metals, the pouring rate should be minimum for

A.	steel	B.	aluminium
C.	brass	D.	cast iron

118.

If dross and slag along with the liquid metal reach the mould cavity they produce the defect known as

A.	misrun	B.	inclusions
C.	blow holes	D.	all of the above

119.

Slag and dross can be removed by

A.	skimming from the molten metal	B.	using bottom pouring ladle
C.	using pouring basin in place of a pouring cup	D.	any of the above

120.

Hot spots are generally found in castings

A.	having abrupt variation in section	B.	with uniform cross-section
C.	symmetrical about two axes	D.	small in weight but large in volume