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400 Important Manufacturing And Production Technology MCQ Question and Answer | PDF Free Download
1.The cutting fluid mostly used for machining steel is
- AWater
- BSoluble oil
- CDry
- DHeavy oils
2.The ductile materials, during machining, produce
- AContinuous chips
- BDiscontinuous chips
- CContinuous chips with built up edge
- DEither (A) or (C)
3.The tool life is said to be over if
- APoor surface finish is obtained
- BThere is sudden increase in cutting forces and power consumption
- COverheating and fuming due to heat of friction starts
- DAll of the above
4.A fixture is defined as a device which
- AHolds and locates a workpiece and guides and controls one or more cutting tools
- BHolds and locates a workpiece during an inspection or for a manufacturing operation
- CIs used to check the accuracy of workpiece
- DAll of the above
5.Which of the following statement is wrong about ultrasonic machining?
- AIt is best suited for machining hard and brittle materials.o
- BIt cuts materials at very slow speeds
- CIt removes large amount of material
- DIt produces good surface finish
6.Gears can be best produced on mass production by
- AShaping
- BCasting
- CForming
- DHobbing
7.In drilling brass, a drill with
- AZero helix angle is used
- BLow helix angle is used
- CHigh helix angle is used
- DAny helix angle can be used
8.Which of the following statement is wrong?
- AThe larger side rake angle produces chipping
- BThe smaller rake angle produces excessive wear and deformation in tool
- CThe increase in nose radius decreases tool life
- D0
9.Glazing in grinding wheels __________ cutting capacity.
- AHas no effect on
- BIncrease
- CDecrease
- DNone of these
10.Ceramic cutting tools are
- AMade by cold pressing of aluminium oxide powder
- BAvailable in the form of tips
- CBrittle and have low bending strength
- DAll of these
11.The process of changing the shape of grinding wheel as it becomes worn due to breaking away of the abrasive and bond, is called
- ATruing
- BDressing
- CFacing
- DClearing
12.The relation between the tool life (T) in minutes and cutting speed (V) in m/min is (where n = An exponent, which depends upon the tool and workpiece, and C = A constant)
- AVnT = C
- BVTn = C
- CVn/T = C
- DV/Tn = C
13.What is the type of welding defect is caused due to stresses on heating and cooling called?
- AIncomplete penetration
- BShrinkage void
- CSlag Entrapment (Inclusions)
- DIncomplete fusion
14.Which of the following statement is wrong?
- AThe diamond is the hardest tool material and can run at cutting speeds about 50 times that of high speed steel tool
- BThe ceramic tools can be used at cutting speeds 40 times that of high speed steel tools
- CThe cemented carbide tools can be used at cutting speeds 10 times that of high speed steel tools
- DThe ceramic tools can withstand temperature up to 600°C only
15.An expendable pattern is used in
- ASlush casting
- BSqueeze casting
- CCentrifugal casting
- DInvestment casting
16.In a single point tool, the angle between the surface of the flank immediately below the point and a line drawn from the point perpendicular to the base, is known as
- ASide relief angle
- BEnd relief angle
- CBack rake angle
- DSide rake angle
17.The swing diameter over the bed is ________ the height of the centre measured from the bed of the lathe.
- AEqual to
- BTwice
- CThrice
- DOne-half
18.High speed steel drills can be operated at about _________ the speed of high carbon steel drills.
- AOne-half
- BOne-fourth
- CDouble
- DFour times
19.The stroke of a shaping machine is 250 mm. It makes 30 double strokes per minute. The overall average speed of operation is
- A3.75 m/min
- B5 m/min
- C7.5 m/min
- D15 m/min
20.A feed gear box for a screw cutting lathe is designed on the basis of
- AGeometric progression
- BArithmetic progression
- CHarmonic progression
- DNone of these