Indian Institute of Technology Madras (IIT-M) 2003 M.Tech Mechanical Engineering mechanical engg-gate - Question Paper

(b) cyaniding
(c) normalizing
(d) tempering
55. With a solidification factor of 0.97x976 s/m2, the solidification time (in seconds) for a
spherical casting of 200 mm diameter is
(a) 539
(b) 1078
(c) 4311
(d) 3233
56. A shell of 100 mm diameter and 100 mm height with the corner radius of 0.4 mm is to be
produced by cup drawing. The needed blank diameter is
(a) 118 mm
(b) 161 mm
(c) 224 mm
(d) 312 mm
57. A brass billet is to be extruded from its initial diameter of 100 mm to a final diameter of
50 mm. The working temperature of 700°C and the extrusion constant is 250 MPa. The force
needed for extrusion is
(a) 5.44 MN
(b) 2.72 MN
(c) 1.36 MN
(d) 0.36 MN
58. A metal disc of 20 mm diameter is to be punched from a sheet of two mm thickness. The
punch and the die clearance is 3%. The needed punch diameter
(a) 19.88 mm
(b) 19.94 mm
(c) 20.06 mm
(d) 20.12 mm

59. A batch of 10 cutting tools could produce 500 components while working at 50 rpm with a
tool feed of 0.25 mm/rev and depth of cut of 1mm. A similar batch of 10 tools of the identical
specification could produce 122 components while working at 80 rpm with a feed of 0.25
mm/rev and one mm depth of cut. How many components can be produced with 1 cutting tool
at 60 rpm?
(a) 29
(b) 31
(c) 37
(d) 42
60. A threaded nut of M16, ISO metric type, having two mm pitch with a pitch diameter of
14.701 mm is to be checked for its pitch diameter using 2 or 3 numbers of balls or
rollers of the subsequent series is
(a) Rollers of two mm
(b) Rollers of 1.155 mm
(c) Balls of two mm
(d) Balls of 1.155 mm
61. 2 slip gauges of 10mm width measuring 1.000 mm and 1.002 mm are kept side by side
in contact with every other lengthwise. An optical flat is kept resting on the slip gauges as
shown in the figure. Monochromatic light of wavelength 0.0058928 mm is used in the
inspection. The total number of straight fringes that can be observed on both slip gauges is
(a) 2
(b) 6
(c) 8

Earning:   Approval pending.