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400 Important Manufacturing And Production Technology MCQ Question and Answer | PDF Free Download
1.In drilling Bakelite and fibrous plastics, the point angle of a drill is
- A90°
- B118°
- C135°
- D150°
2.The usual value of the point angle of a drill is
- A70°
- B100°
- C118°
- D130°
3.The guide-ways are of
- AFlat type
- BV-type
- CDovetail type
- DAny one of these
4.The method of grinding used to produce internal cylindrical holes and tapers, is
- AInternal cylindrical grinding
- BForm grinding
- CExternal cylindrical grinding
- DSurface grinding
5.Glazing in grinding wheels takes place when the
- AWheel is too hard or wheel revolves at a very high speed
- BWheel is too soft or wheel revolves at a very slow speed
- CWheel is too hard and wheel revolves at very slow speed
- DWheel is too soft and wheel revolves at a very high speed
6.Grinding wheels should be tested for balance
- AOnly at the time of manufacture
- BBefore starting the grinding operation
- CAt the end of grinding operation
- DOccasionally
7.If the diameter of the hole is subject to considerable variation, then for locating in jigs and fixtures, the pressure type of locator used is
- AConical locator
- BCylindrical locator
- CDiamond pin locator
- DVee locator
8.The tool life is affected by
- ADepth of cut
- BCutting speed
- CFeed
- DAll of these
9.In centreless grinding, the surface speed of regulating wheel is
- A5 to 15 m/min
- B15 to 60 m/min
- C60 to 90 m/min
- D90 to 120 m/min
10.In centre less grinders, the maximum angular adjustment of the regulating wheel is
- A5°
- B10°
- C15°
- D20°
11.The size of a shaper is given by
- AStroke length
- BMotor power
- CMass of machine
- DRate size
12.In drilling softer materials, the cutting speed is ___________ as compared to harder materials.
- ASame
- BSame
- CHigh
- DNone of these
13.Lathe bed is made of
- AMild steel
- BAlloy steel
- CPig iron
- DChilled cast iron
14.The abrasive slurry used in ultrasonic machining contains fine particles of
- AAluminium oxide
- BBoron carbide
- CSilicon carbide
- DAny one of these
15.Fixtures are used
- AFor holding and guiding the tool in drilling, reaming or tapping operations
- BFor holding the work in milling, grinding, planing or turning operations
- CTo check the accuracy of workpiece
- DNone of the above
16.Two streams of liquid metal which are not hot enough to fuse properly result into a casting defect known as
- ACold shut
- BSwell
- CSand wash
- DScab
17.The cutting fluid mostly used for machining alloy steels is
- AWater
- BSoluble oil
- CDry
- DSulphurised mineral oil
18.Which of the following is the correct data structure for solid models?
- ASolid part - faces - edges – vertices
- BSolid part - edges - faces – vertices
- CVertices - edges - faces - solid parts
- DVertices - faces- edges - solid parts
19.The hole to be drilled for tapping is _________ the outside diameter of the thread on the tap
- AEqual to
- BSmaller than
- CGreater than
- DNone of these
20.The grade of grinding wheel depends upon
- AHardness of the material being ground
- BSpeed of wheel and work
- CCondition of grinding machine
- DAll of these