DOWNLOAD MECHANICAL ENGINEERING PREVIOUS YEARS QUESTION PAPERS PTU B.TECH
INDUSTRIAL AUTOMATION AND ROBOTICS ME 310 B Tech 6/7th Sem. May 2k5
Note: Section A is compulsory. Attempt any Four questions from Section B and any Two questions from Section C.
Section A Marks 2 each1.
Draw the standard symbol for non-return type flow control valve and twin pressure valve.
Why a receiver is used in a pneumatic system?
What is Coanda effect? Describe with diagram.
What is the lower bound approach to calculate frequency of a transfer line being down?
What are the properties of a double acting compressor?
Differentiate between the rotary and inline transfer f work parts.
What is a work envelope of a robot?
Distinguish between accuracy and repeatability of a robot.
What are the properties of pneumatic energy that make it fit for the engineering applications.?
Draw the graph showing the relationship between frequency of reciprocation and coefficient of friction in centre board hopper feeder.
Section B Marks 5 each
2. What are the types of automations that can be used in a production system? Compare them for their merits and demerits.
3. An external gate hopper has a gate 6 mm wide, through which the shank of the rivets pass, the dia of the shank rivet is 5 mm, the gap between inner sleeve and the body of feeder is 2.5 mm, the distance between slots is 12.5 mm. Estimate the maximum feed rate if the efficiency with which rivets fall into slots is 30%
4. If a receiver capacity is 300 liters, the electric motor used is 7.5 kW capacity, the labour cost for 8 hour per day is Rs. 80, cost of the compressor and plant is Rs. 40,000 and the loss of air during production is 5%, what is the time needed to create a pressure of 6 bar(g) . The cost of 1m3 free air is Rs. 0.60, electricity cost is Rs. 3.50, the life of the compressor and plant is 10 years if run continuously.
5. What does it mean by edge detection? Describe a quantitative technique to find out the edge of an object.
6. Illustrate a gripper with; (a) can operated, (b) gear operated and (c) lever operated fingers
Section C Marks 10 each
7. an emergency stop system is to be designed for a certain production machine. A single start system is used to turn on the power to machine at he beginning of the day. In addition there are three stop buttons located at different locations around the machine. Any one of which can be pressed to immediately turn off power to the machine.
(a) Write the truth table for this system.
(b) Write the Boolean logic expression for the system.
(c) Construct the logic network diagram for the system.
8. (a) If the movement diagram for a 2 cylinder (A & B) pneumatic system is as given in Fig. 1 draw the pneumatic circuit diagram for the same.
Fig. 1
(b) Draw the diagram for NOR gate and Bi-stable flip-flop. Also state about their working along with constructional details.
9. (a) Two plates of 5 mm thickness are to be welded with square butt joint as shown in Fig. 2. The welding is a square weld. The welding torch should start from position A, move to B, continue with continuous arc welding along BC in a straight line and then to move to position D. Write a VAL program in world coordinates.
Plate 2
(b) What is Pattern Recognition? Briefly describe a sensing device to generate contour pictures of a workpiece.
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