railway DFCCIL Executive 2025 Mock Test Draftsman Basic Engineering Drawing Drawing Instruments

The size of B₁ Drawing Board as per B.I.S. is-

1

1000 × 1500 × 25 mm

2

1000 × 700 × 25 mm

3

700 x 500 x 15 mm

4

500 x 350 x 15 mm

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