Shielding gases are used to protect the molten metal from what?

Slip occurs via two partial dislocations because of (a) the shorter path of the partial dislocation lines; (b) the lower energy state through partial dislocations; (c) the charge balance.

Inspection for bearing condition will include: (clo4) a)-color b)-smell c)-size d)-none of the above

Aquick transition of the operating speed of a shaft from its critical speed will whirl amplitude. (a) increase (b) limit (c) not affect (d) zero