MCQOPTIONS
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MCQOPTIONS
This section includes 52 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Engineering Questions knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following statements are true for block diagrams? 1. Block diagrams are the pictorial representation of the system 2. The complicated systems can be easily represented by connecting different blocks 3. Block diagram represents the relationship between input and output of the system |
| A. | Statements (1) and (2) |
| B. | Statements (2) and (3) |
| C. | Statements (1) and (3) |
| D. | Statements (1), (2) and (3) |
| Answer» E. | |
| 2. |
Which of the following is/are the drawback/s of proportional control? 1. Proportional control system is complicated and costly. 2. Proportional control system is not suitable for pressure temperature and flow control problems 3. If there are sudden disturbance, the proportional control system takes time to stabilize. |
| A. | (1) |
| B. | (2) |
| C. | (3) |
| D. | (1), (2) and (3) |
| Answer» D. (1), (2) and (3) | |
| 3. |
Which of the following is/are the Continuous Control Mode/s used in control systems? |
| A. | On-Off Control |
| B. | Integral Control |
| C. | Proportional Control |
| D. | All of the above |
| Answer» E. | |
| 4. |
Which of the following is/are characteristic/s of mechatronic products and systems? |
| A. | Functional interaction between mechanical, electronic and information technologies |
| B. | Spacial interaction of subsystems in one physical unit |
| C. | Intelligence related to the control functions of the mechatronics system |
| D. | All of the above |
| Answer» E. | |
| 5. |
Which of the following functions can a control system carry out? |
| A. | The system output can be controlled to some desired particular value for particular input |
| B. | If certain conditions are satisfied, it can give a particular sequence of output, corresponding to given input |
| C. | Either a. or b. |
| D. | None of the above |
| Answer» D. None of the above | |
| 6. |
Which of the following cannot be an input that is given to the PLC? |
| A. | Manual switches |
| B. | Relays |
| C. | Sensors |
| D. | None of the above |
| Answer» E. | |
| 7. |
Which of the following cannot be considered as data in Data Acquisition System (DAQ)? |
| A. | Temperature |
| B. | Mechanical displacement |
| C. | Flow rate |
| D. | None of the above |
| Answer» E. | |
| 8. |
Which of the following can be the output of PLC? 1. Relay coils 2. Solenoids 3. Indicators 4. Motors 5. Lamps 6. Alarms |
| A. | Only (1), (2), (3) and (4) |
| B. | Only (3), (4), (5) and (6) |
| C. | Only (1), (2), (3) and (5) |
| D. | All the (1), (2), (3), (4), (5), and (6) |
| Answer» E. | |
| 9. |
Which module of data acquisition system (DAQ) consists of the CPU that controls the complete data acquisition system? |
| A. | Input module |
| B. | Output module |
| C. | Sampling module |
| D. | Control module |
| Answer» E. | |
| 10. |
Which method is used for stability analysis? |
| A. | Nyquisit criteria |
| B. | Root locus method |
| C. | Routh Hurwitz criteria |
| D. | All of the above |
| Answer» E. | |
| 11. |
Which control system does not have a stability problem? |
| A. | Open loop system |
| B. | Closed loop system |
| C. | Both a. and b. |
| D. | None of the above |
| Answer» B. Closed loop system | |
| 12. |
When the output is bounded for bounded inputs, then the system is said to be_______. |
| A. | stable |
| B. | unstable |
| C. | functional |
| D. | nonfunctional |
| Answer» B. unstable | |
| 13. |
When ___________ contacts are actuated, they disrupt the power supply through them. |
| A. | normally open type |
| B. | normally closed type |
| C. | both a. and b. |
| D. | none of the above |
| Answer» C. both a. and b. | |
| 14. |
What is/are the maximum number of arrow/s (Input/s) allowed to go inside the block? |
| A. | One |
| B. | Two |
| C. | Three |
| D. | Four |
| Answer» B. Two | |
| 15. |
What is used to make considerable simplification in the devices such as watches and cameras etc. as compared to pure mechanical designs? |
| A. | Actuators with electrical auxiliary energy |
| B. | Amplifiers with electrical auxiliary energy |
| C. | Both a. and b. |
| D. | None of the above |
| Answer» D. None of the above | |
| 16. |
What is the ratio of amplitude of response to that of the input called? |
| A. | Response |
| B. | Gain |
| C. | Phase |
| D. | Frequency |
| Answer» C. Phase | |
| 17. |
What is the input of the data acquisition system (DAQ) to which a transducer is connected called? |
| A. | control element |
| B. | channel |
| C. | interface |
| D. | function |
| Answer» C. interface | |
| 18. |
What is the formula for thermal capacitance? |
| A. | (Change in heat stored) / (Change in heat transfer rate) |
| B. | (Change in heat stored) / (Change in thermal resistance) |
| C. | (Change in heat stored) / (Change in temperature) |
| D. | Unpredictable |
| Answer» D. Unpredictable | |
| 19. |
The type of memory which is fast and temporarily stores the data which are immediately required for use is called as______. |
| A. | HDD |
| B. | ROM |
| C. | RAM |
| D. | SSD |
| Answer» D. SSD | |
| 20. |
The temperature control system which maintains the temperature of a room at 30 °C when it is set is an example of_____ |
| A. | Open loop system |
| B. | Closed loop system |
| C. | Both a. and b. |
| D. | None of the above |
| Answer» C. Both a. and b. | |
| 21. |
The task of time sharing, in which large number of data signals are sent through cables or buses, is performed by____ |
| A. | sensors or transducers |
| B. | central processing unit (CPU) |
| C. | multiplexer |
| D. | analog to digital converter |
| Answer» D. analog to digital converter | |
| 22. |
The study of relationship between the input and output, when the input is invariant with respect to time is called as_____ |
| A. | static characteristics of instruments |
| B. | dynamic characteristics of instruments |
| C. | variable characteristics of instruments |
| D. | none of the above |
| Answer» B. dynamic characteristics of instruments | |
| 23. |
The range of control of controller __________ due to presence of offset. |
| A. | increases |
| B. | decreases |
| C. | remains constant |
| D. | cannot say |
| Answer» C. remains constant | |
| 24. |
The process of establishment of a relationship between the input to the instrument and output from the instrument is called as_____ |
| A. | static sensitivity |
| B. | static characterization |
| C. | static accuracy |
| D. | static calibration |
| Answer» E. | |
| 25. |
The PLC is used in _______. |
| A. | machine tools |
| B. | automated assembly equipment |
| C. | moulding and extrusion machines |
| D. | all of the above |
| Answer» E. | |
| 26. |
The phenomenon of storing heat energy in a system is called as thermal______. |
| A. | conductance |
| B. | resistance |
| C. | capacitance |
| D. | all of the above |
| Answer» D. all of the above | |
| 27. |
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 |
| Answer» E. | |
| 28. |
The displacement of a mass attached to a spring in mechanical system is corresponding to _______ in the electrical system |
| A. | inductance |
| B. | resistance |
| C. | capacitance |
| D. | current |
| Answer» E. | |
| 29. |
The controller characteristics for on-off controller follow _________. |
| A. | only one curve |
| B. | two curves |
| C. | four curves |
| D. | unpredictable |
| Answer» C. four curves | |
| 30. |
The characteristic that provides an output with respect to the relation with the input is called as ___________ |
| A. | calibration of a system |
| B. | response of a system |
| C. | characteristic relation of a system |
| D. | instrumentation of a system |
| Answer» C. characteristic relation of a system | |
| 31. |
The capacity of data acquisition system (DAQ) can be specified in terms of______ |
| A. | number of control elements |
| B. | number of channels |
| C. | number of interfaces |
| D. | number of functions |
| Answer» C. number of interfaces | |
| 32. |
The capability of convention relay systems for complex operations is ___________ that of the PLCs . |
| A. | poor than |
| B. | excellent than |
| C. | as good as |
| D. | unpredictable as |
| Answer» B. excellent than | |
| 33. |
PLC can be ___________ in plant to change the sequence of operation. |
| A. | only programmed |
| B. | only reprogrammed |
| C. | programmed and reprogrammed |
| D. | able to give a set point |
| Answer» D. able to give a set point | |
| 34. |
On-off Control is also called as ________. |
| A. | one position control |
| B. | two position control |
| C. | four position control |
| D. | half position control |
| Answer» C. four position control | |
| 35. |
__________ of PLCs can be done in very little time. |
| A. | Programming |
| B. | Installation |
| C. | Commissioning |
| D. | All of the above |
| Answer» E. | |
| 36. |
Micro-controllers are ________________ than the PLCs. |
| A. | bulky and expensive |
| B. | bulky but cheaper |
| C. | portable and cheaper |
| D. | portable but expensive |
| Answer» D. portable but expensive | |
| 37. |
__________ is the time required for the response to reach 50% of the final value in the first attempt. |
| A. | Rise time |
| B. | Peak time |
| C. | Settling time |
| D. | Delay time |
| Answer» E. | |
| 38. |
________ is the curve plotted between input and output by giving known inputs to an instrument and obtaining corresponding outputs. |
| A. | characteristic curve |
| B. | accuracy curve |
| C. | calibration curve |
| D. | sensitivity curve |
| Answer» D. sensitivity curve | |
| 39. |
In which system does the output not affect the process in any way? |
| A. | Open loop system |
| B. | Closed loop system |
| C. | Both a. and b. |
| D. | None of the above |
| Answer» B. Closed loop system | |
| 40. |
In which stage the measurement system comes in contact with the measurand or the quantity to be measured? |
| A. | Transducer Stage |
| B. | Signal Processor Stage |
| C. | Output Stage |
| D. | None of the above |
| Answer» B. Signal Processor Stage | |
| 41. |
In all cases of input frequency, if the gain starts reducing, the phase angle will _______. |
| A. | start reducing |
| B. | start increasing |
| C. | be remain constant |
| D. | be unpredictable |
| Answer» B. start increasing | |
| 42. |
If the value of error increases, the changing speed of controller output __________. |
| A. | increases |
| B. | decreases |
| C. | remains constant |
| D. | cannot say |
| Answer» D. cannot say | |
| 43. |
If the frequency of the input signal to a system is increased, the amplitude of the output _______. |
| A. | start reducing |
| B. | start increasing |
| C. | be remain constant |
| D. | be unpredictable |
| Answer» B. start increasing | |
| 44. |
How is the speed of operation of conventional relay system as compared to digital controllers? |
| A. | very slow |
| B. | very fast |
| C. | same |
| D. | almost similar |
| Answer» B. very fast | |
| 45. |
How is the noise immunity of PLCs to electrical noises as compared to that of conventional relay controllers? |
| A. | poor |
| B. | excellent |
| C. | as good as noise immunity of conventional relay controllers |
| D. | unpredictable |
| Answer» B. excellent | |
| 46. |
Heat in thermal system is analogous to __________ in electrical energy. |
| A. | current |
| B. | potential difference |
| C. | resistance |
| D. | charge |
| Answer» E. | |
| 47. |
Digital to Analog Conversion is ______________ Analog to Digital Conversion. |
| A. | less complex than |
| B. | more complex than |
| C. | as complex as |
| D. | unpredictable |
| Answer» B. more complex than | |
| 48. |
Data acquisition of all the physical quantities in the real world is done in |
| A. | the analog mode |
| B. | the digital mode |
| C. | either analog mode or digital mode |
| D. | none of the above |
| Answer» B. the digital mode | |
| 49. |
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. | none of the above |
| Answer» D. none of the above | |
| 50. |
According to Nyquist theorem, the sampling rate should be _________ as fast as the highest frequency of the signal being measured or sampled. |
| A. | twice |
| B. | thrice |
| C. | ten times |
| D. | hundred times |
| Answer» B. thrice | |