Exercise: Production Engineering

Questions for: Production Engineering

A grinding wheel becomes glazed (i.e. cutting edge takes a glass-like appearance) due to
A:
wear of bond
B:
breaking of abrasive grains
C:
wear of abrasive grains
D:
cracks on grinding wheel
Answer: C
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Which of the following process is used for preparing parts having large curved surfaces and thin sections?
A:
Hot machining
B:
Ultra-sonic machining
C:
ECM process
D:
Chemical milling
Answer: D
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For fast removal of materials during grinding, a __________ grinding wheel is used.
A:
coarse grained
B:
fine grained
C:
medium grained
D:
Answer: A
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The actual feed in centreless grinders is given by (where d = Dia. of regulating wheel, n = Revolutions per minute, and α = Angle of inclination of wheel)
A:
πd
B:
πd n
C:
πd n sin α
D:
πd n cos α
Answer: C
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The stroke of a shaping machine is 250 mm. It makes 30 double strokes per minute. The overall average speed of operation is
A:
3.75 m/min
B:
5 m/min
C:
7.5 m/min
D:
15 m/min
Answer: C
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