This set of Machine Tools and Machining Interview Questions and Answers for experienced focuses on “Lathe : Methods of Taper Turning”.
1. Which of the following is not the method of taper turning?
a) compound rest method
b) tailstock offset method
c) attachment method
d) none of the mentioned
View Answer
Explanation: All are methods of taper turning.By using compound rest method and and attachment method, both internal and external taper can be turned while tailstock offset method is used only for external tapers.
2. From tool method is used where accuracy is the major criterion.
a) true
b) false
View Answer
Explanation: This is false. From tool method is used when accuracy is not the major criterion.The form tool should be set at right angels to the axis of the work.
3. From tool method is generally used for_____ production for producing_____ length of taper.
a) mass, small
b) mass, long
c) little, small
d) little, long
View Answer
Explanation: This method is used for mass production for producing small length of taper.
4. Tailstock method is highly suitable for producing steep tapers.
a) true
b) false
View Answer
Explanation: This is false. Tailstock method is not suitable for producing steep tapers.
5. Attachment method can produce only small taper.
a) true
b) false
View Answer
Explanation: This is false. Lengthy taper can be produced by this method.
6. In compound slide method, which of the following is swiveled?
a) top slide
b) swivel base
c) apron
d) none of the mentioned
View Answer
Explanation: Top slide is swiveled in this method. It is swiveled to half the included angel of the taper.
7. In compound slide method, one part of compound rest is swiveled to_____ the included angle of the taper.
a) the same as
b) half
c) double
d) none of the mentioned
View Answer
Explanation: In compound slide method, one part of compound rest is swiveled (at half the included angle of the taper). We can easily set this compound slide.
8. In compound rest method, the amount of taper for setting the angle is calculated from this formula, tan of angle of taper =_____
a) (D-d) / L
b) (D-d) / 2L
c) (D-d) / 4L
d) none of the mentioned
View Answer
Explanation: (D-d) / 4L – this is the formula for the tan of the angel of taper. Taper is the shape in which the diameter of the both ends are different.
9. Which type of tapers can be produced by using compound rest method?
a) internal
b) external
c) both internal and external
d) none of the mentioned
View Answer
Explanation: Both internal and external taper can be produced by using compound slide method. But there is one disadvantage. We can only give hand feed so we can’t expect a high accurate and mass work.
10. Which of the following is not true for compound slide method?
a) threads, which are there on taper portion cannot be produced
b) steep taper cannot be produced
c) taper length is limited to the movement of the top slide
d) none of the mentioned
View Answer
Explanation: All mentioned sentences are true except the sentence which says that steep taper can’t produced by this method. Steep taper can be produced by this method.
11. In attachment method, the bar having graduations in degree is set at the_____ with the lathe axis.
a) 0 degree
b) 90 degree
c) any desired angle
d) 180 degree
View Answer
Explanation: The bar is set at any desired angle with the lathe axis. The principle of turning taper by attachment is to guide the tool in a straight path set an angel to the axis of rotation of the work piece, while the work is being revolved between centers or by a chuck aligned to the lathe axis.
12. In compound slide method, taper length is limited to the movement of_____
a) apron
b) swivel base
c) top slide
d) none of the mentioned
View Answer
Explanation: Taper length is limited to the movement of top slide in this method. Along with this, easily setting of the compound slide can be done easily.
13. The taper can be turned up to maximum setting angle of_____ for both outside and inside tapers with taper attachment and automatic feed.
a) 5 to 6 degree
b) 1 to 2 degree
c) 10 to 12 degree
d) none of the mentioned
View Answer
Explanation: The taper can be turned up to maximum setting angle of 10 to 12 degree for both outside and inside tapers with taper attachment and automatic feed.
14. Attachment method is most suitable for producing duplicate tapers.
a) true
b) false
View Answer
Explanation: Attachment method is most suitable for producing duplicate tapers because the change in length of job does not affect the taper.
15. Which of the following is not true for attachment method?
a) lengthy tapers can be produced
b) the alignment of the lathe center is disturbed
c) power feed can be given
d) none of the mentioned
View Answer
Explanation: All the sentences are true except the sentence which says that the alignment of the lathe center is disturbed. The alignment of the lathe center is not disturbed in attachment method.
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