At that company, you check them before, and after... :rolleyes:

Oke student pilot, my name is Chuck Yeager, I am your instructor today.
Lets start with the preflight checklist.

PREFLIGHT CHECKLIST:

1. MASTER SWITCH ON
2. DO THE WALKAROUND (AT LEAST FOR 20 MINUTES)
3. HAVE A COFFEE BREAK,MASTER SWITCH ON

ETC,ETC,ETC:}:

Wish it was a joke, but in that school it's not.

typically Hobbs receive power through the master switch but are also wired in series with an oil pressure switch so they don't run until theengine starts