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

Answer is:

holding on cone mandrel and machining between centres

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

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

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.

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

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

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

Answer is:

External and internal Morse tapers

114) One of the methods of aligning lathe centres is trial cut method. The diameter at the tailstock end is found to be bigger than the headstock end by 0.1 mm after the trial cut. Before the next trial cut the tailstock body should be moved by

Answer is:

0.05 mm towards the operator

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