Multiple Choice
If an old casting is to be used as a pattern, to account for various allowances.
A) to provide draw screws, holes can be drilled and tapped in the castings
B) the castings are cleaned and made smooth
C) casting is shaken while withdrawing from mould
D) the surfaces are lagged with thin strips of wood or leater
Correct Answer:
Verified
Correct Answer:
Verified
Q15: Which of the following metals has the
Q16: Cores are made from core sand mixed
Q17: Grey cast iron is<br>A)resistant to shock<br>B)least fluid
Q18: Hot spots are generally found in castings<br>A)symmetrical
Q19: A mould which has good erosion resistance
Q20: A drawback is employed when<br>A)the pattern is
Q21: High silicon irons are<br>A)resistant to wear<br>B)brown in
Q22: Normal shrinkage allowance for aluminium is 18
Q23: In case of copper, the pouring temperature
Q25: Slag in a blast furnace is<br>A)lighter than