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2 Marks:

1. Explain the static performance characteristics of a sensor (Nov/ Dec 2008)

2. Explain the static(steady state)characteristics of transducers (April / May 2008)

3. Explain the Dynamic characteristics of transducers. (April / May 2008)

4.

Explain any three sensors used for temperature measurement. (April / May 2008)

5. Write short notes on

Thermo couple

Piezo electric transducer

Photovoltaic transducer (Nov/ Dec 2008)

6. Draw the sketch of a closed loop system and explain the basic elements in the above

system. (May / June 2009)

7. Explain open loop and closed loop with suitable examples. (May / June 2009) (Nov/ Dec

2009)

8.

Explain shaft control system with neat sketch (May / June 2009)

9. Explain piezo electric sensors and tactile sensors. (May / June 2009)

10.Explain the principle and application of proximity and light sensors. Nov/ Dec 2009

11.Explain with neat sketch the functioning of Pyroelectric sensors and Thermo

diodes.(Nov/Dec 2012)

12.Write short notes on servo mechanism.(Nov/ Dec 2012)

13.Brief about Bourdon tube pressure gauge (May / June2007)

16 Marks:

1.

List the various modes of control system? (May/June 2013)2. What are the basic elements of feedback system? (May/June 2013)

3. What is measurement system? (May/ June 2009)

4. Explain response time and rise time. (May/ June 2009)

5. Identify the different mechatronics systems used in automobiles.(Nov/Dec 2008)

6. What is the working principle of eddy current proximity sensor ? (April / May 2008)

7. Write two factors that need to be considered in selecting a sensor for a particular

application. (April / May 2008)

8. Define Mechatronics.(Nov/Dec 2009)

9.

Explain the difference between open loop and closed loop controllers. (Nov/Dec 2009)10.Distinguish between a transducer and a sensor. (Nov/Dec 2009)

11.How do you classify the sensors ? (Nov/Dec 2009)

12.What are the main elements constitute a mechatronic system. (Nov/ Dec 2012)

(Nov/Dec 20143)

13.Differentiate open loop and closed loop system with example. (Nov/ Dec 2012)

14.What are the 2 factors that need to considered in selecting a sensor for a particular

application. (April / May 2008 )

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Unit 2

2 marks

1 A hydraulic is to be used to move a work piece through a distance of 60mm in 20 seconds. A

force of 15KN is required to move the work piece. Determine the required hydraulic liquid flow rateif a cylinder with a piston diameter of 75mm is available

2 Suggest suitable actuator for robot arm joint and justify

3 Distinguish between a transducer and sensor

4 How do you classify the sensor

5 What is meant by incremental an suitable encoder

6 Draw the circuit diagram and waveform of cycloconverter

7 Explain the working principle of pneumatic diaphragm actuator

8 What is a Darlington pair

9 What is a function poppet valve

10 What is the application of rachet and pawl

11 Define repeatability and reproducibility in sensors

12 What is hall effect

13 Write short notes on the significance of guage factor

14 Lsit out the factors to be considered while selecting a motor

16 MARKS:

1 Discuss about the following actuation system

(1) self excited wound field shunt configuration dc motor

(2) self excited wound field series configuration dc motor

(3) stepper motor

(4) induction motor

2 A flat belt 7 mm thikc under 95 mm wide transmits power between two pulleys running 1500

m/min. the mass of the belt is 0.85kg /m length . the angle of lap in smaller pulley is 155 And the

coefficient of friction between and pulley is 0.25 . if the maximum permissible stress in the belt is

2MN/m find the maximum power transmitted and initial tension in the belt

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3 Explain with neat sketches the functioning of following sensors

(1) pyroelectric sensor

(2) thermo diodes

4 Explain the principle and application of proximity and light sensor

5 Explain in detail construction and working of LVDT .also draw the characteristics of output voltage

for different core position for LVDT

6 With a neat sketch write the construction and working of a BLDC motor and a DC servo motor

7 (1)Explain various types of ball and roller bearing

(2) Explain thyristor and triac in details

8(1) Explain the working principle of stepper motor in half step mode

(2) Explain various type of cam followers

9(1) Explain the principle of pilot operated valve

(2) Describe hoe a sequential valve can be used to initiated an operation only when another

operation has been completed

10 (1)Explain the principle and the operation of relay control system

(2) discuss the various type of dc motor and also control of dc motors

11 (1) Explain the working principle of dc servo motor

(2)Explain cyclo convertor

12 (1) Explain the working principle of piezoelectric actuator

(2)Explain the velocity sensor with suitable diagram

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