Cork Institute of Technology
Higher Certificate in Engineering in Mechanical Engineering – Award
(NFQ – Level 6)
Autumn 2007
Manufacturing Technology – Production Technology & Welding
(Time: 3 Hours)
Answer FIVE questions, THREE from Section A
and TWO from Section B
Use separate answer books for each Section.
All questions carry equal marks.
Examiners: Mr. J. Burns
Mr. R. Kennedy
Mr. J. Connolly
Dr. P. Delassus
Section A
Q1. (a) Sketch and label the cross-section of a lathe-bed which has a combination of flat and
vee-slides. Why is a pair of vee-slides never used? (4 marks)
(b) State three factors which govern the cutting speed when machining metal on a lathe.
(6 marks)
(c) Describe how an imperial thread is cut on a metric lathe. (10 marks)
Q2. (a) Describe with the aid of a detailed diagram the centreless grinding machine and state how
it may be operated. (10 marks)
(b) There are three distinct variations of centreless grinding. Describe them in detail.
(9 marks)
(c) State at least two examples of work which may be produced on the machine mentioned
at (a). (1 mark)
Q3. Fig.1 shows an exercise which is to be milled on the C.N.C. machine. The following
operations must be carried out on the exercise, drilling slotting including a circular slot
which is to be made in a clockwise direction and the cutter is to traverse around the
perimeter of the exercise. Complete the following:
(i) Complete the table by indicating the values for the numbered positions on the
exercise shown on Fig. 1B with the reference to x and y and the origin; (3 marks)
(ii) Prepare a programme which can be fed into the machine to execute the exercise.
(17 marks)
