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Reg No.:_ Name:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
SEVENTH SEMESTER B.TECH DEGREE EXAMINATION(R&S), DECEMBER 2019

Course Code: ME407
Course Name: MECHATRONICS

Max. Marks: 100 Duration: 3 Hours
PARTA

Answer any three full questions, each carries 10 marks. Marks

1 Explain the working of incremental and absolute optical rotary encoders. Why (10)

gray code is used in coding absolute encoders.

2 9) Describe the working of LVDT with a neat sketch. (6)
b) Explain the working of any one type each of flow and pressure sensors. (4)
3 Develop a pneumatic circuit with standard symbols, to operate two cylinders in (10)

sequence. Explain its working.

4 a) Mention any two differences between finite position and infinite position valves. (2)

0) Illustrate the working of spool valve and poppet valve with a neat sketch. (8)
PART ‏تا‎
‎Answer any three full questions, each carries 10 marks.
5 Explain the principle, fabrication and working of MEMS based capacitive type (10)
pressure sensor.
6 93) Describe the DRIE process with a neat sketch. (5)
b) Prepare a comparative report of each one technique in CVD and PVD. (5)
7 838) Compare the salient features of hydrostatic and hydrodynamic bearing. (5)

b) Explain the working of a mechanical device using closed loop control system (5)
with the help of a suitable example.

8 Two motors are to be controlled in a sequence. The second motor starts 30 (10)
seconds after the starting of first motor by a push switch. Develop a PLC ladder
diagram for the following cases and describe the circuit.

Case (A): Only one motor operates at a time.
Case (B): Both the motor gets off together after 50 seconds.
PART ட
Answer any four full questions, each carries 10 marks.
9 Develop a mathematical model for the chassis of a car as a result of a wheel (19)

moving along a road.

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