FOUR RIDDLES

1. How can you tell a plumber from a chemist?
2. Why couldn't the church sextant keep a secret?
3. Who was the eeler's favorite singer?
4.  What do you call a chart showing statistics for sheep?

Answers:

1. Ask him to pronounce UNIONIZED.
2. He always tolled the bell.
3. Elvers Presley
4. A baa graph 

Credits:
#1: The Enigma, August, 2015
#2: Louis D. Appel 
#3: Richard Silvestri 
#4: Timothy L. Meaker