430 Machine Drawing
dharm
d:\N-Design\Des22-1.pm5
48. The expansion of U/C is _____.
49. The material abbreviation CS stands for _____.
50. The material abbreviation CrS stands for _____.
51. Explain the meaning of the following abbreviations:
(a) A/C (b) CYL (c) DIA and φ
(d) EQUIP-SP (e) HEX (f) MATL
(g) PCD (h) R and RAD (i) TOL
52. Give the standard abbreviations for the following:
(a) Counter sink (b) Diametral pitch (c) Ground
(d) Nominal (e) Number (f) Spot facing
(g) Square (h) Screw
53. Provide standard abbreviations for the following:
(a) Cast steel (b) Forged steel (c) Grey iron
(d) High carbon steel (e) Structural steel (f) Brass
54. Identify the materials with the following abbreviations:
(a) CI (b) HSS (c) Spring S (d) GM
(e) WI (f) GI (g) MS
55. Explain the meaning of the following notes:
(a) DIA 30 DEEP 25 (b) KEYWAY, WIDE 8 DEEP 4
(c) U/C, WIDE 10 DEEP 5 (d) NECK, WIDE 4 DEEP 2
(e) MORSE No.2 (f) 10 ACME THD
56. Write the notes to the following instructions:
(a) Drill a through hole of diameter 15 mm and counter sunk to get 20 mm diameter on
top.
(b) Drill through hole of diameter 15 mm counter bored to a depth of 6 mm with a diameter
20 mm ; the number of such holes being six.
(c) Drill a through hole of diameter 13 and counter bore to insert a socket headed cap
screws of 12 mm nominal diameter, eight holes are to be made equi-spaced on the
circle.
(d) Cut a key seat of 8 mm width and 6 mm deep.
(e) Make a diamond knurl with 1mm pitch and end chamfer of 45°.
(f) Carburise, harden and ground.
CHAPTER 3
1. In the orthographic projection, the projectors are _____ to the plane of projection.
(a) Parallel (b) Perpendicular (c) Inclined
2. To draw a side view, an auxiliary vertical plane is imagined to be placed _____.
(a) Perpendicular to both H.P and V.P.
(b) Perpendicular to H.P and parallel to V.P.
(c) Perpendicular to V.P and parallel to H.P.
3. The number of mutually perpendicular planes that may surround an object in space is
_____.
(a) Four (b) Three (c) Six
