1) Which of the following options best describes the centre lathes?
a. Machining machines
b. Shaping machines
c. Turning machines
d. None of the above
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Answer
Explanation
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ANSWER: Turning machines
Explanation:
No explanation is available for this question!
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2) Assume a machining process of taper turning. In this process, a large diameter of taper is 'D' and it is uniformly decreased to the small diameter of the taper 'd' at the horizontal length of tapered part of workpiece is 'L'. What is the correct formula for half of tapper angle (2α / 2)?
a. α = sin –1 ((D – d) / 2L)
b. α = cos –1 ((D – d) / 2L)
c. α = tan –1 ((D – d) / 2L)
d. α = cot –1 ((D – d) / 2L)
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Answer
Explanation
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ANSWER: α = tan–1 ((D – d) / 2L)
Explanation:
No explanation is available for this question!
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3) Consider the following diagram of machining tool. What is the type of the tool shown below?
a. Turning tool
b. Facing tool
c. Chamfering tool
d. Parting or necking tool
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Answer
Explanation
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ANSWER: Chamfering tool
Explanation:
No explanation is available for this question!
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4) Consider the following diagram of tailstock.
The part shown in blue color in the below diagram is called as
a. tailstock clamping lever
b. tailstock dead centre
c. tailstock spindle
d. none of the above
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Answer
Explanation
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ANSWER: tailstock spindle
Explanation:
No explanation is available for this question!
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5) Which type of process the machining can be?
a. Cold working
b. Hot working
c. Both a. and b.
d. None of the above
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Answer
Explanation
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ANSWER: Cold working
Explanation:
No explanation is available for this question!
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6) When the tool of centre lathe moves perpendicular to the axis of rotation,
a. it produces a cylindrical surface
b. it produces a flat surface
c. it produces a tapered surface
d. none of the above
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Answer
Explanation
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ANSWER: it produces a flat surface
Explanation:
No explanation is available for this question!
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7) The foundation of the centre lathe is called as
a. carriage
b. tray
c. base
d. bed
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Answer
Explanation
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ANSWER: bed
Explanation:
No explanation is available for this question!
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8) The centre lathes receive their power through
a. headstock
b. tailstock
c. both a. and b.
d. none of the above
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Answer
Explanation
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ANSWER: headstock
Explanation:
No explanation is available for this question!
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9) Which of the following is not a part of carriage of the centre lathe?
a. Tool post
b. Apron
c. Compound rest
d. Gear box controls
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Answer
Explanation
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ANSWER: Gear box controls
Explanation:
No explanation is available for this question!
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10) What is swing over carriage?
a. The maximum diameter of workpiece that can be rotated over the bed ways
b. The minimum diameter of workpiece that can be rotated over the bed ways
c. The maximum diameter of workpiece that can be rotated over lathe saddle
d. The minimum diameter of workpiece that can be rotated over lathe saddle
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Answer
Explanation
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ANSWER: The maximum diameter of workpiece that can be rotated over lathe saddle
Explanation:
No explanation is available for this question!
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