KWA - MACHINE TOOLS
SYLLABUS
Study of parts, working, different operation and of lathes - milling machine - shaping machine - slotting machine - planning machine - various attachments - quick return mechanisms1. LATH MACHINE
UNITS OF MEASUREMENTS, PAINTING COEFFICIENT, OUT TURN, QUANTITY CALCULATION
DEDUCTION • MASONRY : < 0.1 m2 - no deduction • PLASTERING : < 0.5 m2 - no deduction 0.5 - 3 m2 - one side deduction > 3 - both side deduction • End of beams, rafters, purlins < 0.05 m2 - no deduction • Bearing of floors, roof slabs etc. - no deduction DIGREE OF ACCURACY • Volume - 0.01 m3 • Area - 0.01 m2 • Dimension - 0.01 m • Weight - 1kg QUANTITY CALCULATION PCC • Maximum size of aggregate 40 mm • For 1 m3 PCC - 0.95 m3 coarse aggregate is required RCC • Maximum size of aggregate 20 mm • For 1m3 RCC - 0.90 m3 coarse aggregate is require RCC For 1:1.5:3 Wt of cement = (1/3) x 0.90 x 1440 = 432 kg Wt of sand = (1.5/3) x 0.90 x 1600 = 747 kg PCC For 1:4:8 Wt of cement = (1/8) x 0.95 x 1440 = 171 kg Wt of sand = (4/8) x 0.95 x 1660 = 760 kg PLASTERING 1:3 - 0.14 m3 / 10 m2 (sand) cement = (1/3) x 0.14 x 1440 = 67 kg...
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