You can always replace any tiles during a turn by skipping your turn and selecting new ones from the tile bag ... but I think you're asking if you can play both blanks in a single turn. Yes, and those are scored as 0 points and will remain whatever letter you announce them to be during that turn in completing your word.
The 2 blank tiles may be used as any letter. When playing a blank, the player must state which letter it represents. It remains that letter for the rest of the game.
Yes
redefine the fields that contain low-values as alpha-numeric and move ' ' to them.
move the L's decimal point 3 spaces to the right. Fill in any blanks remaining with zeros.
Relocate
if the caliper is stuck u need to replace the caliper it is also a wise move to buy a matched pair of calipers, cheaper , and replace both sides at same time
Move, transport.
At the time he had decided to move on
Open the hood and there are screws on both sides loosen then move flaps and pull light backwards until you can get to the bulb.
Both
Volt Tackle
He/she picks it randomly
Exchange, and replace fit this description.
Not unless you want to replace an engine....