Lubricating attachments.—Name the attachments used upon an engine cylinder to lubricate the piston and valves. [II. 373].

Pet cock.—What is the difference between a cylinder pet cock and a cylinder relief valve? [II. 373].

Relief valves.—What are cylinder relief valves used for? [II. 373].

Quick steam admission.—Which gives the quickest steam admission, a long and narrow or a wide and short steam port, both having the same area? [II. 373].

Placing the piston-ring split.—At what part of the cylinder bore should the split of a piston ring be placed? [II. 374].

Fitting a piston ring.—How tight should a piston ring fit to the cylinder bore? [II. 374].

Testing steam tightness.—How would you test the steam tightness of a piston? [II. 374].

Jacketed.—What is a jacketed cylinder? [II. 374].

Valve gear.—What is a releasing valve gear? What is a positive valve gear? [II. 374].

Packing a stuffing box.—About how full of packing would you fill a stuffing box for a piston gland? [II. 375].