This European nation has the only remaining "Grand Duchy" in the world.
Luxembourg
A driver raises their left arm out the window to form a 90 degree angle. They're telling you that they're about to...
Turn right
A fleet of geriatrics
Old Navy
System of exchanging goods or services without using money
Barter
A grand piano has this many foot pedals
Three
The most common native tongue in Europe.
German (90-95 million)
What shape is the sign that marks the beginning of a school zone?
Pentagon 
Partition Market
Walmart
Tanzania gets part of its name from this island
Zanzibar
The number of strings on a violin
Four
This European Country has the longest total coast line
Norway (The original Vikings!)
You turn on this for visibility ahead of you in inclement weather
Low Beams! (The bright light from your high beams will only reflect off of rain, snow, or fog, making it more difficult for you to see)

Walgreens
A decompression chamber can also be called this kind of chamber
A hyperbaric chamber(A Barometric Chamber)
It is the largest drum of the orchestra
The bass drum
This country has the most Eurovision titles of any nation in the EU (7)
Ireland
This gauge tells the revolutions per minute of the engine
Tachometer (ta·kaa·muh·tr)
0.63
7/11
In reinforced concrete it's what does the reinforcing
Rebar
The name of this wind instrument means 'little' in Italian
Piccolo

Switzerland
You must signal this far ahead before making a turn
100 ft
Buzz Lightyear's morning routine
Bed, Bath and Beyond!
You eat the red stalks of this plant; the green leaves are toxic
Rhubarb
The name for the end of a horn that projects the sound
The Bell