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141.

Green colour on a pattern indicates

A.	Surface to be left unmachined	B.	Surface to be machined
C.	Core prints	D.	Seats for loose core prints
E.	Fillets

142.

An important factor to be taken into account while designing a core print is

A.	Pattern material	B.	Type of mould
C.	Moulding sand characteristics	D.	Pouring temperature
E.	Buoyancy effect of molten material

143.

A pattern maker's contraction rule accounts for

A.	All pattern allowances	B.	All materials to be cast
C.	All materials of the pattern	D.	Only shrinkage, draft and distortion allowances
E.	Only shrinkage allowance

144.

In case of cast iron castings, the shrinkage allowance is

145.

Which of the following materials will have highest value of contraction allowance

146.

The machining allowance provided on patterns depends on

A.	The material of the casting	B.	The material of the pattern
C.	The composition of moulding sand	D.	Temperature of molten material
E.	Size and shape of casting

147.

Machining allowance in case of die casting is

A.	Large	B.	Same as in other methods of casting
C.	Small	D.	Very small
E.	Generally not provided

148.

Choose the incorrect statements. A coolant should be

A.	Good lubricant	B.	Light in weight
C.	Transparent	D.	Harmless to operator and machine

149.

Generally the pattern used in manufacturing cast iron pipes are

150.

When small castings are to be produced in large numbers, the type of pattern generally used is