When assembled, the hole $$ \begin{array}{r} +0.030 \\ 30+0.000 \end{array} $$. mm and shaft $$ \begin{array}{r} +0.020 \\ 30-0.020 \end{array} $$ mm will result in

A liquid metal is poured in a mold cavity of size $200 \mathrm{~mm} \times 200 \mathrm{~mm} \times 200 \mathrm{~mm}$. The cooling is uniform in all directions with NO additional compensation for shrinkage. Considering the volumetric shrinkage during solidification and solid contraction as $7 \%$ and $8 \%$, respectively, the length of the cube edge after cooling down to the room temperature is ___________ mm (rounded off to 1 decimal place).

$$ \text { Match the mold elements in the casting process with the most suitable function } $$

Column I		Column II
P.	Blind riser	I.	Casting with internal cavity
Q.	Chill	II.	Molten metal reservoir
R.	Skim bob	III.	Nucleating agent
S.	Core	IV.	Assisting in faster heat removal from melt
T.	Insulating sleeve	V.	Removal of impurities
U.	Inoculant	VI.	Increasing the solidification time