386. Lathe spindle has got
A.Internal threads
B.External threads
C.Taper threads
D.No threads

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387. Which of the following lathe operations requires that the cutting edge of a tool bit be placed exactly on the work centre-line?
A.Boring
B.Drilling
C.Facing
D.Turning

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388. Lathe centres are provided with the following standard taper
A.Morse
B.British
C.Metric
D.Sharpe

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389. Brown and sharp taper is generally used in
A.Lathes
B.Milling machines
C.Shapers
D.Drills

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390. On screw machines having cross and vertical slides, cutting off operations are usually performed by the
A.Horizontal slide
B.Vertical slide
C.Cross-slide
D.Cross-drilling attachment

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391. Internal or external tapers on a turret lathe can be turned by
A.Face turning attachment
B.Taper turning attachment
C.Sliding attachment
D.Morse taper attachment

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392. In order to turn taper on length l with two end diameters d1 and d2 set over the tail stock stover required is
A.d1-d2
B.(d1-d2)/2
C.(d1-d2)/2l
D.(d1-d2)/l

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