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Mechatronics Question Paper - Jun 18 - Electronics And Telecomm (Semester 5) - Pune University (PU)
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Mechatronics - Jun 18
Electronics And Telecomm (Semester 5)
Total marks: 80
Total time: 3 Hours
INSTRUCTIONS
(1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Draw neat diagrams wherever necessary.
1.a.
With the help of a lock diagram explain servomechanism. State its applications.
(6 marks)
00
1.b.
what are rotary encoders? Explain how angular displacement can be measured using optical rotary encoders.
(8 marks)
00
1.c.
Explain the hydraulic system and state the use of Accumulator in a Hydraulic system.
(6 marks)
00
2.a.
What is the use of Pump in a hydraulic system? Compare positive dispacement (Hydra static) type and Non-positive Dispacement (Hydrodynamic) type of pumps.
(8 marks)
00
2.b.
Write a short note on load cell. Discuss its use to measure force, signal conditioning requirement and its application.
(6 marks)
00
2.c.
In the double reduction gear train shown in the following, figure, B and C from a compound wheel free to rotate on the layshaft. The speed of D is to be one-tenth of the speed for A. For A the number of teeth is 80, for C they are 80 and for D they are 160. Find a suitable number of teeth for wheel B.
(6 marks)
00
3.a.
Explain the working of Adsorption and absorption type of Dryers. State its advantages and disadvantages.
(8 marks)
00
3.b.
Elaborate on Air-treatment stages in a pnuematic system.
(8 marks)
00
OR
4.a.
Explain with the help of diagram working of Pick and Place robot.
(8 marks)
00
4.b.
Draw a neat labelled diagram to explain the working of a lubricator in a pneumatic system
(6 marks)
00
4.c.
Draw symbol of 4/3 solenoid type and push button type DCV.
(2 marks)
00
5.a.
Represent 4/2 and 5/3 DCV symbolically.
(10 marks)
00
with the help of a diagram explain the actuation of a double acting cylinder using 4/3 DCV in a pneumatic system. Explain every component used in the system.
5.b.
What is a stepper motor? With the help of a diagram explain its working.
(4 marks)
00
5.c.
A four stack variable reluctance motor has a step angle of $1.8^{0} , find number of its rotor and stator teeth.
(4 marks)
00
OR
6.a.
State different types of Control valves. Explain working and the selection of a solenoid valve.
(6 marks)
00
6.b.
What are Electro mechanical relays? state its use.
(6 marks)
00
6.c.
State and compare different types of Actuators, state their advantages and disadvatages.
(6 marks)
00
7.a.
The figure below shows the entry of the car parking system. Consider appropiate inputs and outputs and explain the working of the same using PLC ladder diagram or any other appoach.
(5 marks)
00
7.b.
What is an Engine Management system (EMS)? state its main components and explain the various sensors used in an EMS with the help of a schematic.
(8 marks)
00
OR
8.a.
What are the main components of a computer Numerical Control (CNC) Machine? Explain the functionality of each component with the help of neat block diagram. Compare the conventional NC with CNC machine.
(10 marks)
00
8.b.
WIth the help of a block diagram explain the Anti Lock Braking system. State its significance in a vehicle.
(6 marks)
00
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