John Cheetam's "Scherzo" is a good one. Any other answers depend on your playing level.
Five musicians who play brass instruments (i.e. trumpet or trombone) playing together.
Annapolis Brass Quintet was created in 1971.
Atlantic Brass Quintet was created in 1985.
Naters Brass Quintet was created in 1990.
American Brass Quintet was created in 1960.
Chicago Brass Quintet was created in 1963.
Vandalay Brass Quintet was created in 2007.
Smoky Mountain Brass Quintet was created in 1993.
5
Five instruments play in a quintet.
It depends on the piece. If you are playing the bass line, it is considered a low brass instrument. However, if you are playing the more common counter melody, it is a tenor instrument. The "group" the horn or french horn plays in is called the brass (as opposed to woodwind, string, or percussion). It is also often a part of a brass quintet or a woodwind quintet as well as other chamber ensembles.
The French horn.