A.to provide an opening through which molten metal is poured
B.to give an indication that mould is filled
C.to allow the heat of molten metal to dissipate to atmosphere
D.to supply molten metal to casting as it tends to contract during solidification
A.at least one man on side B should be removed
B.the force applied on A must be equal to that on B
C.the force required on A must not be equal to that on B
D.infinite force will be required to be applied at both ends
A.1.8 to 9.5 %
B.4.1 to74.2 %
C.3.2 to 12.5 %
D.1.6 to 8.5 %
A.Tempered
B.Hardened
C.Annealed
D.Tempered and annealed
E.Hardened and tempered
A.incentive scheme
B.bonus plan
C.fringe benefit
D.Perk
A.can use low-grade brine
B.requires less electric power than the modified Solvay process
C.does not require NH3 plant investment
D.all of the above
A.Cement
B.Paper
C.Wood
D.Rubber
E.Glass
A.Worm gears
B.Herringbone gears
C.Spiral gears
D.Helical gears
E.Bevel grars
A.25-50 cpm
B.50-100 cpm
C.100-175 cpm
D.175-290 cpm
E.300-350 cpm
A.Very low pressures
B.Pressure differential
C.Atmospheric pressures
D.High pressures
E.Pressures above and below atmospheric pressure
