Question

how did private quelch manage to anger the corporal

Answer 1

he interfered in middle of lecture of corporal Turnbull and corrected him which in turn angered corporal

Answer 2

Corporal Turnbull was a different kind was a different kind of instructor. He was not to be trifled with. one day he was explaining the outside of a grenade. He said that it was divided into various fragments. The professor interrupted "Forty-Four segments. Corporal Turnbull gave the professor the granade and ask him to take the Class. professor gave the lecture. All were thunder struck. Corporal asked professor to fall with others. Corporal took his revenge by nominating him for permanent cook house duties.