Unlike Violin/Guitar and Organ, this question attracted most candidates’ attention.  Although their performance was not spectacular, it was fair.  It was evident that most of them only know the trumpet by name but did not study it to know the technical questions and supply the expected answers such as

•   Never hold the trumpet by the bell or the slides.
•   Clean the trumpet regularly. 
•   Apply oil where/when necessary.

(b)  Mouthpiece, - Valve, Slide, bell, lead pipe

(c) Trombone, French horn, Tuba