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Machinist Set-1
Lathe
145

Lathe MCQ - Machinist(Set-1) with Answers

145) Which one of the following diameters of the workpiece should be turned before cutting external threads ?

Major diameter

Core diameter

Pitch diameter

Head diameter

Answer is:

Major diameter

Which one of the following diameters of the workpiece should be turned before cutting external threads ?

Lathe MCQ - Machinist(Set-1) with Answers

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Related Lathe MCQ - Machinist(Set-1) with Answers

146) When the threading tool reaches the end of the thread, the tool should be

left in the groove and reverse the workpiece

withdrawn after stopping the machine

withdrawn while the tool is taking cut

withdrawn after removing the workpiece

Answer is:

withdrawn while the tool is taking cut

147) The amount of tailstock offset for taper turning is done by the set screws provided. The procedure to be followed is :

Loosen both screws and push the body to the amount of offset

Loosen both the screws and push the base to the amount of offset

Loosen the screws opposite to the direction of movement and tighten the other screw

Loosen the screw on the direction of movement and tighten the other screw

Answer is:

Loosen the screws opposite to the direction of movement and tighten the other screw

148) When rough turning a workpiece with a carbide tool long curly chips are formed. Which one of the following is the right way of getting rid of this kind of chips ?

Stop the power feed at intervals so that the chip breaks

Change the rake angle

Provide chip breaker on the tool

Use a metal hook and pull away the chips

Answer is:

Provide chip breaker on the tool

149) You want to fix an irregularly shaped workpiece on a lathe, which one of the following accessories is the most appropriate ?

Three-jaw self-centering chuck

Driving plate

Face plate

Catch plate

Answer is:

Face plate

Explanation:

When fixing irregular shaped work-peice on lathe, face plate in the most suitable accessori.

You want to fix an irregularly shaped workpiece on a lathe, which one of the following accessories is the most appropriate ?

Lathe MCQ - Machinist(Set-1) with Answers

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