lock nut washers, slotted Students: nut keys, spines Draw screw threads fasteners and locking devices using conventional symbols Teaching Materials: Lock nut scoffed nut keys, spines and pins 5 ENGINEERING WORKING Teacher: DRAWINGS. Guides student to prepare working drawing of Example of machine parts simple machine parts e.g. crank and pedal e.g. brackets, sleeves cylinders etc Student; Prepare working drawing of simple machines past Teaching materials Crank and pedals 6 ENGINEERING WORKING Teacher: DRAWINGS Guides students to prepare working drawing Example of machine pasts s of simple machine parts eg piston, crank e.g. block piston, and commenting rod connecting rod etc Student : Prepare work drawing of simple machines parts Teaching Materials: Piston, connecting rod crank 7 ENGINEERING WORKING Teacher: DRAWINGS Guides students to prepare working drawings Machine assemblies e.g. of machine assembles to incarnate bolts and parallel clamps, water taps nuts. Students; Prepare working drawing of machine assemblies Teaching materials: Parallel clamps. Water tap. 8 ENGINEERING WORKING Teacher: DRAWINGS Guides student to prepare working Machine assemblies e.g. drawings of machine assemblies to bearing barring bracket incorporate locking devices e.g. keys and pulley Students: Prepare working drawings of machine assemblies