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400 Important Manufacturing And Production Technology MCQ Question and Answer | PDF Free Download
1.High speed steel tools retain their hardness up to a temperature of
- A250°C
- B350°C
- C500°C
- D900°C
2.For machining a mild steel work piece using carbide tool, the maximum material will be removed at a temperature of
- A50°C
- B100°C
- C175°C
- D275°C
3.Stellite preserves hardness up to a temperature of
- A350°C
- B500°C
- C900°C
- D1100°C
4.The type of reamer used for reaming operation in a blind hole, is
- AStraight fluted reamer
- BLeft hand spiral fluted reamer
- CRight hand spiral fluted reamer
- DAny one of these
5.The carbide tools operating at very low cutting speeds (below 30 m/min)
- AReduces tool life
- BIncreases tool life
- CHave no effect on tool life
- DSpoils the work piece
6.The obtuse angle, included between the chisel edge and the lip as viewed from the end of a drill, is called
- AHelix or rake angle
- BPoint angle
- CChisel edge angle
- DLip clearance angle
7.The angle formed by the leading edge of the land with a plane having the axis of the drill, is called
- AHelix or rake angle
- BPoint angle
- CChisel edge angle
- DLip clearance angle
8.The machining of titanium is difficult due to
- AHigh thermal conductivity of titanium
- BChemical reaction between tool and work
- CLow tool-chip contact area
- DNone of these
9.Crack in grinding wheel is developed due to
- AHigh temperature developed at the contact of the wheel face and work
- BGrinding hard work
- CLow speed of wheel
- DHigh speed of wheel
10.Flank wear depends upon the
- AHardness of the work and tool material at the operating temperature
- BAmount and distribution of hard constituents in the work material
- CDegree of strain hardening in the chip
- DAll of these
11.The factor responsible for the formation of continuous chips with built up edge is
- ALow cutting speed and large rake angle
- BLow cutting speed and small rake angle
- CHigh cutting speed and large rake angle
- DHigh cutting speed and small rake angle
12.In order to achieve a specific surface finish in single point turning, the most important factor to be controlled is
- ADepth of cut
- BCutting speed
- CFeed
- DTool rake angle
13.In determining the various forces on the chip, Merchant assumed that the
- ACutting edge of the tool is sharp and it does not make any flank contact with the workpiece
- BOnly continuous chip without built-up-edge is produced
- CCutting velocity remains constant
- DAll of the above
14.In a CNC program block, N002 GO2 G91 X40 Z40......, GO2 and G91 refer to
- ACircular interpolation in counter clockwise direction and incremental dimension
- BCircular interpolation in counter clockwise direction and absolute dimension
- CCircular interpolation in clockwise direction and incremental dimension
- DCircular interpolation in clockwise direction and absolute dimension
15.In an interchangeable assembly, shafts of size 25.000 -0.0100⁺⁰∙⁰⁴⁰ mm mate with holes of size 25.000 -0.010⁺⁰∙⁰²⁰ mm. The maximum possible clearance in the assembly will be
- A10 microns
- B20 microns
- C30 microns
- D60 microns
16.Which of the following operation is first performed?
- ASpot facing
- BBoring
- CTapping
- DDrilling
17.The velocity of tool along the tool face is known as
- AShear velocity
- BChip velocity
- CCutting velocity
- DMean velocity
18.In oblique cutting system, the cutting edge of the tool
- AMay clear the width of the workpiece
- BMay or may not clear the width of the workpiece
- CMay not clear the width of the workpiece
- DShould always clear the width of the workpiece
19.When the cutting edge of the tool is dull, then during machining
- AContinuous chips are formed
- BDiscontinuous chips are formed
- CContinuous chips with built-up edge are formed
- DNo chips are formed
20.Segmental chips are formed during machining
- AMild steel
- BCast iron
- CHigh speed steel
- DHigh carbon steel