Production Process - 1 - Dec 2012

Mechanical Engineering (Semester 3)

TOTAL MARKS: 80
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Assume data if required.
(4) Figures to the right indicate full marks.

Write short notes on any four of the following -

1 (a) Pattern allowances(5 marks) 1 (b) Welding defects(5 marks) 1 (c) Up milling, Down milling(5 marks) 1 (d) Types of cores(5 marks) 1 (e) CNC machines (5 marks) 2 (a) Explain -
(i) Principle of gating
(ii) Principle of risering (10 marks) 2 (b) Sketch block diagram of Knee type verticle milling machine and state functions of each principle past.(10 marks) 3 (a) Sketch the following Drilling operations -
(i) Conuter boaring
(ii) Spot tacing
(iii) Reaming
(iv) Tapping
(v) Counter sunking(10 marks) 3 (b) Compare shaper and planner.(5 marks) 3 (c) Explain centreless grinding operation.(5 marks) 4 (a) Compare TIG and MIG welding.(10 marks) 4 (b) Write the composition, properties and uses of -
(i) Grey cast iron
(ii) Stainless steel
(iii) white cast iron
(10 marks) 5 (a) With neat sketch explain submerged are welding process its advantages and disadvantages.(8 marks) 5 (b) Define cutting speed, feed and dept of cut in case of turning operation.(6 marks) 5 (c) Explain in details Plasma Arc Machining.(6 marks) 6 (a) Explain the principle, process and application of powder metallurgy process with their advantages and limitations.(10 marks) 6 (b) What is NDT? Explain the Technique of ultrasonic inspection method with neat sketch and discuss its advantages over other techniques.(10 marks)

Write the explantory notes on any four of the following -

7 (a) Stud Welding(5 marks) 7 (b) Metal Spraying (5 marks) 7 (c) Dressing and truing of grinding wheel(5 marks) 7 (d) Ultrasonic machine(5 marks) 7 (e) Electro discharge machining.(5 marks)