Hot Blast of Air Is Supplied to the Blast Furnace

Q15: Which of the following facilitates shaking and

Q16: In furan process, furan resins are primarily

Q17: Annealing of aluminium castings<br>A)improves ductility<br>B)relieves micro stresses<br>C)reduces

Q18: Tin coated low carbon steel chaplets are

Q19: In die casting<br>A)there is no need of

Q20: Core prints are<br>A)made separately in the mould

Q21: There is no need for the withdrawal

Q22: Plaster patterns and core boxes are made

Q23: Scabs may be caused by<br>A)low permeability of

Q24: Which of the following is used to