CS/B.TECH/PWE/SEM-8/PWE-804A/2013
2013
TECHNOLOGY OF MACHINING & METAL CUTTING
Time Allotted : 3 Hours Full Marks : 70
The figures in the margin indicate full marks.
Candidates are required to give their answers in their own words
as far as practicable.
GROUP – A
( Multiple Choice Type Questions )
1. Choose the correct alternatives for any ten of the following :
10x1 = 10
i) The strength of a single point cutting tool depends upon
a) rake angle b) clearance angle
c) lip angle d) inclination angle.
ii) The composition of commonly used HSS is
a) 18 W 4 Cr 1 V
b) 12 Mo 1 W 4 Cr 1 V
c) 6 Mo 6 W 4 Cr 1 V
d) none of these.
iii) A milling cutter having 8 teeth is rotating at 150 r.p.m.
If the feed per tooth is 0·1 mm the value of the table
speed in mm/min is
a) 120 b) 187
c) 125 d) 70.
iv) Crater wear on tool always starts at some distance from
the tool tip because at that point
a) cutting fluid does not penetrate
b) normal stress on rake surface is maximum
c) temperature is maximum
d) tool strength is minimum.
v) Size of a shaper is given by its
a) stroke length
b) motor power
c) weight of the machine
d) rate size.