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Permeability of Moulding Sand is the property of the sand, which permits the gases and steam to escape through the sand mould. For this purpose, the sand must be porous. Permeability of the sand depends on size of the sand grains, shape of the grains, moisture contents in the mould sand, compactness density and bonding content etc.
BASIC PRINCIPLES : The purpose of a propeller is to convert the power developed by the engine into a useful force called 'Thrust'. This force must be equal to and opposite in
(a) Discuss the requirements, specifications and special requirements for the design of arterial road networks and residential area street networks in a developing suburban region
Constant speeding propeller: The definition of a Constant Speeding propeller is 'A propeller, the pitch setting of which varies automatically to maintain a preselected constant
Advantages of hot extrusion
A riser or a feeder head is a passage of sand made in the cope to permit the molten metal to rise above the highest point in the casting after the mould cavity is filled up. Risers
Q. Discuss briefly the causes and remedies of misrun and cold shunts casting Cold Shunt and Misrun : When the metal is unable to fill the mould cavity completely and t
Gated pattern is used to produce good casting. It is essential to make sure that full supply of molten metal flow into every part of the mould. Provision for easy passage of the
Explain Air temperature indicator
Aviation legislation - Certificate of Design: During the construction, the manufacturer has to provide the C.A.A. with a Certificate of Design and also a Type Record for th
why germanium become intrinsic at high temperature
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