Which one of the following abbreviations is used to specify an acme thread ?

110) 'V' grooves of cast iron pulley have to be fine turned. Which one of the following work holding methods gives the highest concentricity ?

holding between a four-jaw chuck and a revolving centre

holding between a three-jaw chuck and supporting with a pipe centre

holding on a split mandrel and machining between centres

holding on cone mandrel and machining between centres

Answer is:

holding on cone mandrel and machining between centres

Explanation:

111) To get a fine even surface on a workpiece by facing operation on lathe, it is necessary to have

low cutting speed, fine feed and heavy depth of cut

low cutting speed, fine feed and light depth of cut

high cutting speed, fine feed and light depth of cut

high cutting speed, fine feed and heavy depth of cut

Answer is:

high cutting speed, fine feed and light depth of cut

Explanation:

Facing Operation. Facing is the process of removing metal from the end of a workpiece to produce a flat surface. Most often, the workpiece is cylindrical, but using a 4-jaw chuck you can face rectangular or odd-shaped work to form cubes and other non-cylindrical shapes.

112) The included angle of the countersinking portion of a centre drill of type 'B' used for protecting the centre hole is

Answer is:

120 Degree

Explanation:

113) A spindle sleeve is to be assembled to the spindle nose to perform specific operations on a lathe. These sleeves have

External and internal Morse tapers

External Jarno taper and internal Morse taper

External Morse taper and internal Jarno taper

External and internal Jarno taper

Answer is:

External and internal Morse tapers

Explanation:

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Which one of the following abbreviations is used to specify an acme thread ?

Tr60X9

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

110) 'V' grooves of cast iron pulley have to be fine turned. Which one of the following work holding methods gives the highest concentricity ?

holding on cone mandrel and machining between centres

111) To get a fine even surface on a workpiece by facing operation on lathe, it is necessary to have

high cutting speed, fine feed and light depth of cut

112) The included angle of the countersinking portion of a centre drill of type 'B' used for protecting the centre hole is

120 Degree

113) A spindle sleeve is to be assembled to the spindle nose to perform specific operations on a lathe. These sleeves have

External and internal Morse tapers

For More Lathe MCQ - Machinist(Set-1) with Answers