Q.1
Carbide tipped tools usually have
Q.2
The advantage of a broaching operation is that
Q.3
Calculate the weld per minute, work speed of circular electrode of 220 mm diameter for carrying out seam welding at 4 welds per cm on 1.6 mm thick mild steel tube. Welding cycle consists of 3 cycles ‘on’ and 2 cycles ‘off’ Power supply is at 50 Hz.
Q.4
The helix angle of a drill is __________ for drilling brass.
Q.5
Shrinkage allowance on pattern is provided to compensate for shrinkage when
Q.6
Hard and tough materials like cast iron should be turned at
Q.7
In a center lathe, the cutting tool is fed in _________ with reference to the lathe axis.
Q.8
The relation between tool life (T) and cutting speed (V) is VTn = Constant. In this relation, the value of n depends upon
Q.9
When the metal is removed by erosion caused by rapidly recurring spark discharges between the tool and work, the process is known as
Q.10
The operation in which oil is permeated into the pores of a powder metallurgy product is known as
Q.11
In machining metals, chips break due to __________ of work material.
Q.12
As the cutting speed increases, the tool cutting forces
Q.13
The strength of a brazed joint
Q.14
The rake angle of a single point cutting tool corresponds to _________ of a twist drill.
Q.15
In which of the following machine, the work rotates and the tool is stationary?
Q.16
During the execution of a CNC part program block NO20 GO2 X45.0 Y25.0 R5.0 ; the type of tool motion will be
Q.17
The abrasive recommended for grinding materials of high tensile strength is
Q.18
The abrasive recommended for grinding materials of low tensile strength is
Q.19
The cutting force in up milling ________ per tooth movement of the cutter.
Q.20
The factor responsible for the formation of discontinuous chips is
Q.21
The main purpose of a boring operation, as compared to drilling, is to
Q.22
While cutting helical gears on a non-differential gear hobber, the feed change gear ratio is
Q.23
In orthogonal turning of a low carbon steel bar of diameter 150 mm with uncoated carbide tool, the cutting velocity is 90 m/min. The feed is 0.24 mm/rev and the depth of cut is 2 mm. The chip thickness obtained is 0.48 mm. If the orthogonal rake angle is zero and the principle cutting edge angle is 90⁰, the shear angle in degree is
Q.24
The lip angle is the angle
Q.25
The tool material, for faster machining, should have
Q.26
A grinding wheel is said to be of _________ if it holds the abrasive grains more securely.
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