Multiple Choice Tests:

Directions: Answer all the questions listed below.

1. The Mechatronics is an interdisciplinary field in which the disciplines those act together are
_________

A. Mechanical systems and Electronic systems

B. Mechanical systems and Information technology

C. Electronic systems and Information technology

D. Mechanical systems, Electronic systems and Information technology

2. In which stage the measurement system comes in contact with the measure and or the quantity to
be measured?

A. Transducer Stage Signal B. Processor Stage C. Output Stage D. All

3. A group of components which can complete certain tasks or achieve certain desired results in a
desired manner while working together is called as_____

A. Output system B. sequence system C. control system D. All E. None

4. In which system does the output not affect the process in any way and does not have a stability
problem?

A. Open loop system B. Closed loop system C. Feedback control system D. All

5. Data acquisition is the process in which, physical variables from the real world are_____

A. converted into electrical signals

B. modified and converted into a digital format for processing

C. Both A and B. D. All E. None

6. Which of the following cannot be an input that is given to the PLC?

A. Manual switches B. Relays C. Sensors D. Limit switches E. None

7. PLC can be ___________ in plant to change the sequence of operation.

A. only programmed C. programmed and reprogrammed

B. Only reprogrammed D. able to give a set point E. All

8. On-off Control is also called as ________.

A. one position control C. four position control

B. two position control D. half position control E. None

9. The type of pressure sensor that could be used in a Mechatronics System is

A. Deflecting Pressure Sensor B. Weight sensor C. force sensor D. All

10. A bimetallic strip is a device used to sense

A. temperature B. pressure C. flow D. force E. level

11. A solenoid is

A. a sensor C. a control strategy D. a type of pneumatic motor

B. a Mechatronics actuator E. a coding system

12. A strain gauge is a device used to sense

A. time B. heat C. force D. speed E. light level

13. What is a suitable sensor for measuring weight when the industrial process is complete a method of
measuring the weight of output products?

A. Load cell B. strain gauges C. LDVT D. All E. None

14. A Mechatronics control system is used within an industrial environment. Excluding cost, what is an
advantage of a Personal Computer (PC) based system has over a hard wired system?

A. Easily upgraded C. Modular

B. Reprogrammable D. Customizable user interface E. All

15. It is defined as the changing or refining of raw materials that pass through or remain in a liquid,
gaseous, or slurry state to create end product.

A. Process B. Control C. Controller D. Variable E. None

16. What are the main reasons for manufacturers to control a process? Select all options that apply.

A. Reduce variability C. Ensure safety D. Reduce costs

B. Increase efficiency E. All

17. The task associated with any control loop is/are?

A. Measurement B. comparison C. adjustment D. All E. None

18. It is a condition that can change the process in some way.

A. Error B. Offset C. process variable D. load disturbance

19. It is a value for a process variable that is desired to be maintained.

A. Error B. Offset C. Set Point D. load disturbance

20. ___________ is a sustained deviation of the process variable from the set point.

A. Error B. Offset C. Set Point D. load disturbance

21. The measured variable is the condition of the process fluid that must be kept at the designated set
point.

A. Error Measured Variable B. Measured Variable C. Offset D. process variable E. load

disturbance

22. For example, a manufacturer may measure flow into and out of a storage tank to determine tank
level. In this scenario, flow and process fluid level are________ and________ respectively.

A. measured variable, process variable C. manipulated variable, measured variable

B. Process variable, measured variable D. process variable, manipulated variable

23. ________is an undesired change in one of the factors that can affect the set point

A. Load disturbance. B. Error C. Process variable D. Manipulated variable

24. _________are control operations that involve human action to make adjustment.

A. Manual control Systems C. Manual and Automatic control systems

B. Automatic control systems D. open and closed loop control system

25. Which is/are not primary element/sensors in process control?

A. Resistance Temperature Detectors C. Thermocouples

B. Control Valve D. Pitot tubes E. None

26. A_____ is a device that translates a mechanical signal into an electrical signal.

A. Transducer B. Control Valve C. Converter D. Transmitter

27. A device that converts one type of signal into another type of signal, E.g. Current to Voltage, ADC,
DAC, Etc. is/are

A. Transducer B. Control Valve C. Converter D. Transmitter E. None

28. A device that converts a reading from a transducer or Sensor into a standard signal and transmits
that signal to a monitor or controller is/are

A. Transducer B. Control Valve C. Converter D. Transmitter E. None

29. One is not the signal types that are used in the process control industry

A. Hydraulic signals B. Digital signals C. Analog signals D. Pneumatic signals E. None

30. The signals produced by changing the air pressure in a signal pipe in proportion to the measured
change in a process variable.

A. Hydraulic signals B. Digital signals C. Analog signals D. Pneumatic signals

31. The common industry standard pneumatic signal range is

A. 3–15 psig B. 4–20 psig C. 4–20 mA D. 3–15mA E. Al

32. The most common standard analog electrical signal is

A. 3–15 psig B. 4–20 psig C. 4–20 mA D. 3–15mA E. All

33. The ___________ is a human-readable device that displays information about the process or the
instrument it is connected to.

A. Indicators. B. Recorder C. Converter D. Transducer

34. A discrete levels or values that are combined in specific ways to represent process variables and also
carry other information is

A. Digital signal C. Analog signal D. Pneumatic signal

B. Hydraulic Signal E. None

35. A device that records the output of measurement devices is

A. Indicators. B. Recorder C. Converter D. Transducer

36. A device that receives data from a measurement instrument, compares that data to a programmed
set point, and, if necessary, signals a control element to take corrective action is

A. Indicators. B. Recorder C. Converter D. Transducer E. Controller

37. Which of the following have the ability to receive input, to perform a mathematical function with
the input, and produce an output signal?

A. Actuators B. Transmitters C. Transducers D. Controllers

38. Which of the following is the most common final control element in process control industries?

A. Agitator B. Pump motor C. Valve D. Louver E. None

39. _______________ is a part final control device that causes a physical change in the final control
device when signaled to do so.

A. Actuator B. Sensor C. Transducer D. Transmitter E. None

40. It is the part of the control system that acts to physically change the manipulated variable.

A. Correcting element B. final control element C. Transducer D. Sensor E. All except C & D

41. _________are controllers that have at least one other possible position. As set point is approached,
controller takes intermediate steps; therefore, the oscillation around set point can be less dramatic.

A. Discrete controllers C. Multistep controllers D. Selective controller

B. Batch control E. None

42. What type of control strategy is often used to increase the speed of a temperature control loop?

A. Feed forward control C. Feedback control

B. Cascade control D. All E. Ratio control

43. Which types of control loop contains a primary and secondary controller assigned to different
process variables?

A. Cascade control C. Ratio control D. Selective Control

B. Multivariable control E. Feedback control

44. What type of control loop anticipates and controls load disturbances before they can impact the
process variable

A. Feedback control loop C. Feed forward control loop

B. Ratio control loop D. Single variable loop E. None

45. In which type of control system will the more important of two variables be maintained?

A. Fuzzy control B. Cascade control C. Ratio control D. Selective control E. Batch control
46. ___________ Control is a form of adaptive control used to describe a control system in which the
controller uses computer logic to make decisions about adjusting the process.

A. Fuzzy control B. Cascade control C. Ratio control D. Selective control E. Batch control

47. Which of the following variables are commonly measured or monitored in process control
applications?

A. Pressure B. Viscosity C. Nitrogen content D. Flow rate E. All

48. __________ is a deviation from set point due to load disturbance.

A. Error B. Offset C. Rate of change D. All E. None

1.D

2A

3c

4a

5d
6e

7c

8b

9a

10a

11b

12c

13b

14e

15a

16e

17d

18d

19c

20b

21b

22a

23a

24a

25b

26a

27c

28d

29e

30d
31a

32c

33a

34a

35b

36e

37d

38c

39a

40e

41c

42a

43a

44a

45d

46a

47e

48b