Mechatronics Level-IV COC

CHOOSE THE CORRECT ANSWER

PART- 1

1. Potentiometer and bridges are classified as ___ instrument

A. Indicating instrument
B. Comparison instruments
C. Recording Instrument
D. Controlling instrument
2. A process control system is able
A. If the control variable is to oscillate above and below
B. If it can return the controlled variable to steady state
C. If oscillation and steady value present in the o/p stage
D. If both oscillation and steady state value present in the I/P stage
3. Error that remain constant through all repetition of measurement is said to be
A. Random Error
B. Cross error
C. Systematic Error
D. Deviation Error
4. lamination of digital instrumentation
A. Conversion of analog to Digital
B. less affected by noise
C. Greater accuracy and precision
D. Easy to store instrumentation
5. Determination of electrical resistance from voltage measurement in ____
measuring method
A. Direct
B. Comparison
C. Indirect
D. Record
6. A group of physical component combined to perform a specific function. (UC5)
A. Pressure
B. System
 C. Actuator
D. Stability
7. Pictorial representation of the cause and effect relationship between the input
and output of a physical system. (UC4)
A. Block diagram
B. Circuit diagram
C. Valve
D. Filter
8. Supplies air to the pressure vessel through a pipe line and resistance to flow is
provided by a constriction. (UC5,9)
A. Hydraulic power system
B. Electromechanical system
C. Pneumatic system
D. Transfer function
9. Analog display instrumental has the following advantage
A. The display can be set at any value between 0% and 100%
B. Read off errors due to parallax scale
C. No conversion, reading more accurate
D. Measured value output display
10.Electrical maintenance. (UC13)
A. Is safe to use unforeseen circumstances
B. Is illuminated and heated to an appropriate level
C. Ensures the efficiency of the installed system
D. Provides safe monitoring of industrial processes and systems
11.In measuring instrument to measure AC voltage additional thing must be
inserted for (DC voltage measurement) what is that?
A. Rectifier and considering RMS Value
B. Transistor and considering peak voltage
C. An inductor and considering average value
D. Capacitor and considering compensating value
12. Which of the following operation of machine categorized in open-loop control
system?
A. Packing of beer
B. Packing of milk
C. Washing machine
D. Pasteurizing of milk
13. The pre-dimension of measurement in
 A. To know the dimension of measured value
B. Knowledge of which physical quantities can be measured and how they
are defined
C. To know which physical quantities to measured
D. To know the reference of measured value
14. It is a science of technology of complete system designed to measured
physical quantities so as obtain data
A. Meterology
B. Instrumentation
C. Mechatronics
D. Comparison instrument
15. A group of components which can complete certain tasks or achieve certain
desired results in a desired manner while working together is called as_____.
(UC5,11)
A. Output system
B. Sequence system
C. Control system
D. Succession system
16. A “competent” worker is one who: (UC17)
A. Cannot do the job or task
B. Has been trained to do a job or task successfully
C. Can do the job or task more quickly than anyone else
D. Is quarrelsome and likely to cause an argument at work
17.An appropriate performance indicator that a small business might use to
evaluate its level of social responsibility is. (UC18)
A. Results of a customer satisfaction survey
B. Profit
C. Rate of greenhouse gas emissions generated over a period of time
D. Staff turnover
18. On-off control is also called as (UC5)
A. One position control
B. Two position control
C. Four position control
D. Half position control
19. In which stage the measurement system comes in contact with the measured
or the quantity to be measured? (UC10,12)
A. Transducer stage
 B. Signal processor stage
C. Output stage
D. Production stage
20. A cyclical process that involves data gathering, interpretation and
identification of the problem areas and possible acting programs. (UC7,18)
A. Benchmarking
B. Asset
C. Profit
D. Diagnosis
21.The transformation of a set of inputs, which may be material, actions,
methods, and operations into desired outputs in the form of a product. (UC8)
A. Control
B. Process
C. Automation
D. Sensor
22. The term given to programs stored in ROMs or in programmable devices
which permanently keep their stored information. (UC5)
A. Hardware
B. Software
C. Firmware
D. Universal serial bus
23.Deciding now what we are going to later including when and how we are going
to do it. (UC1, UC4)
A. Planning
B. Activity
C. Monitoring
D. Evaluation
24.Which one is displacement measurement sensor? (UC4, UC10)
A. Resistive sensor
B. Light sensor
C. Temperature sensor
D. Light emitting diode
25. What is the input of the data acquisition system (DAS) to which a transducer is
connected called? (UC4)
A. Control element
B. Interface
C. Channel
 D. Function
26. In a device that receives energy from one system in one form and retransmits
it to another system
A. Relay
B. Ultrasonic sensor
C. Limit Switch
D. Transducer
27. Active transducer is sometimes being said to be
A. Self-generating transducer
B. Resistance
C. Capacitance
D. Inductance
28.The signal produced by changing the air pressure in the signal pipe in
proportion to the measured change in a process variable. (UC9)
A. Digital signals
B. Analog signals
C. Resistive temperature device
D. Pneumatic signal
29. Which one is a passive sensor? (UC4)
A. Thermocouple
B. Thermistor
C. Strain gauge
D. Silicon
30.The region between the limits within which a quantity is measured, received or
transmitted, expressed by stating the lower and upper range values is____.
(UC5, UC10)
A. Instrument range
B. Calibration range
C. Zero error
D. Field standard
31. The main objectives of maintenance are (UC2)
A. To obtain plants and equipment’s at its minimum operating efficiency
B. To safeguard instruments by minimizing rate of deterioration
C. Help in implementation of wrong procedures for storage and
consumption of spare
D. To hinder management in taking decisions on replacements or new
investment
32.The main advantages of closed-loop control system (UC11)
A. Reduced sensitivity to disturbance
B. Complex and expensive to construct
C. The loss of gain
D. Quiet easy to become unstable
33.Team commitment and cooperation is developed through (UC15,16)
A. Poor communication and effective decision making
B. Fostering mutual concern and camaraderie between team members
C. Fostering bad feeling between team members
D. Dissatisfied communication and ineffectual decision making
34.Find the measurement of voltage with main value greater error & with value
with value with standard error if series of voltage measurement is as following.
1 2 3 4 5 6 7 8 9
3.99 3.50 3.51 3.40 3.41 3.51 3.53 3.45 3.49
A. 3.49V +/- 0.05V & 3.50V +/- 0.02V
B. 3.50V +/- 0.05V & 3.50V +/- 0.01V
C. 3.99V +/- 0.05V & 3.50V +/- 0.02V
D. 3.53V +/- 0.05V & 3.54V +/- 0.01V

35. Find the measurement of voltage with main value greater error & with main
value with standard error if series of voltage measurement is as follows.
1 2 3 4 5 6 7 8 9 10
3.56 3.50 3.51 3.40 3.41 3.51 3.53 3.45 3.49 3.44
A. 3.49V +/- 0.05V & 3.50V +/- 0.02V
B. 3.50V +/- 0.05V & 3.50V +/- 0.01V
C. 3.56V +/- 0.05V & 3.50V +/- 0.02V
D. 3.53V +/- 0.05V & 3.54V +/- 0.01V
36. Analog us display in instrumentation have the following advantage.
A. This display can be set at any value b/n 0% & 100%
B. Read off efforts due to parallel scale
C. No conversion reading more accurate
D. Measured value output directly
37.Determination of electrical resistance from voltage measurement measuring
method.
A. Direct
 B. Comparison
C. Indirect
D. Record
38.Limitation of digital instrumentation
A. Conversion of analogues & digital
B. Less affected by noise
C. Greater accuracy & precision
D. Easy to store instrumentation
39.Errors that remain constant though all reputation of
A. Random error
B. Cross error
C. Systematic error
D. Deviation error
40.A process control system is stable.
A. If the controlled variable is to oscillate above & below
B. If it can return the controlled variable to steady state
C. If oscillation & steady state value present in the O/P state
D. If both oscillation & steady state value present in the I/P state
41.Potentiometers & bridges are classified as ________ instrument.
A. Indicating instrument
B. Comparison instrument
C. Recording instrument
D. Controlling instrument
42.In measuring instrument to measure AC voltage additional the (DC voltage
measurement) What is that
A. Rectifier & considering RMS value
B. Transistor & considering peak to peak voltage
C. An inductor & considering average value
D. A capacitor & considering compensating value
43.Which of the following operation of machine categorizer?
A. Packing of beer
B. Packing of milk
C. Washing machine
 D. Pasteurizing of milk
44.The pre-requisite for any measurement in
A. To know which dimension of measured value
B. Knowledge of which physical quantities can defined
C. To know which physical quantities is principle
D. To know the reference of measured value
45.It is a science of technology complete system designed to measured quantities
so as to obtain data
A. Meteorology
B. Instrumentation
C. Mechatronics
D. Comparison instrument
46.In a device that receives energy from one system in one form to another
system
A. Relay
B. Ultrasonic sensors
C. Limit switch
D. Transducer
47.Active transducer are sometimes is said to be
A. Self- generating transducer
B. Resistance
C. Capacitance
D. Inductance
48.If one project work value commissioned, this indicates
A. The project are still underway in construction
B. The project are still running with problem
C. The project are invalid all materials are n
D. The project has successfully finished & all material are ready for
opration
49.For a quality control of one factory section the basic idea needed could be
A. There must be enough raw material
B. There must be enough man power
C. There must be enough skilled technical
 D. There must be enough reference power
50.Reputation for consumer’s electrical installation issued by EEP. For power
supply the color while indicate
A. Phase (R)
B. Phase (S)
C. Neutral (O)
D. Ground
51.The word calibrates in mechatronics indicate
A. Supply giving feedback
B. Supply giving set point
C. Supply giving output value
D. Supply giving measured value
52.An example of indicating instrument
A. Kilowatt hour meter
B. Potentiometer
C. Ammeter
D. Bridge
53.One of the following measuring instrument determined quantities
A. Digital multimeter
B. Ammeter
C. Oscilloscope
D. Whistone bridge
54.The best application of capacitive transducer
A. To identify filled or under filled & over
B. To identify number of container
C. To identify size of container
D. To identify presence of container
55.Which one of the following steps take priority in any technic works?
A. Measurement accuracy
B. Use safety equipment
C. Knowing work
D. How to read manual
56.If there are three identical resistors connected parallel the total resistance will
be
A. 3 times each individual resistors
B. 2/3 times each individual resistors
C. 1/3 times each individual resistors
D. 4/3 times each individual resistors
57. The responsible person to maintain the quality of work performed by work
team
A. Supervisor
B. All members of the team
C. Worker
D. Quality assurance officer
58.Resistivity of a conductor is mostly affected by
A. Composition
B. Pressure
C. Temperature
D. Current
59. Written communication methods may include
A. Discussion
B. Negotiation
C. Speeches
D. Instructions
60.What should you when a problem arises while you are reparing electronic
equipment that you cannot solve by yourself?
A. Quit repairing
B. throw it away
C. ask for assistance
D. murmuring & crying
61.What is the power factors of capacitance
A. Zero
B. Unity
C. Lagging
D. Leading
62.The starting winding of single phase motor is placed in the
A. Rotor
B. Stator
C. Armature
D. Field
63. The frequency of DC supply is
A. Zero
B. 16Hz
C. 50Hz
D. 100Hz
64.The demand factor for electrical system is the ratio of
A. Maximum demand to connected load
B. Maximum demand to average load
C. Average power to maximum power
D. Relative power to total power
65. Dielectric materials are
A. Insulating materials
B. Magnetic Materials
C. Semiconducting Materials
D. Ferroelectric Materials
66.Transformer core are laminated in order to :
A. Simplify its construction
B. Minimize eddy current loss
C. Reduce loss
D. Reduce hysteresis loss
67.Star- Delta starter an induction motor
A. Inserts resistance in rotor circuit
B. Inserts resistance in stator circuit
C. Applies reduce voltage to rotor
D. Applies reduce voltage to stator
68. Brush of DC machine are usually made of
A. Hard Coper
B. Soft coper
 C. Carbon
D. All of the above
69.The minimum change in input value that can be detected by measuring called
A. Threshold
B. Resolution
C. Sensitivity
D. Error
70.Multiplying resistor is required in
A. Ammeter
B. Power
C. Ohmmeter
D. Voltmeter
71.One of the following device can be used to isolate the control circuit from the
load
A. Toggle switch
B. Relay
C. Circuit Breaker
D. Rotary Switch
72.The aim of preventive maintenance (PM) is to
A. Increase the reliability of a tool or equipment
B. Increase the failure rate of tool or equipment
C. Reduce the life span of a tool or equipment
D. Improve the standard quality of a tool or equipment
73.The transformer having 1000 primary turns is connected to a 250V AC supply
for a secondary voltage 400V the number of secondary turns should be
A. 1600
B. 250
C. 400
D. 125
74.An electronic component which is used as switching device
A. Capacitor
B. Zener Diode
C. Resistor
 D. Transistor
75.Basic meter movement has an internal resistance of 50hom and full scale
deflection current 150MA. What will be the value of the shunt resistor
required to measure?
A. 20Ω
B. 35Ω
C. 15Ω
D. 50Ω
76. The difference b/n the synchronous speed and the actual speed of an
induction motor is known as
A. Regulation
B. Back lash
C. Slip
D. Lag
77.An electronic device which is used as switching device / purpose
A. Capacitor
B. Ziner diode
C. Resistor
D. Transistor

Answers key Part – I

1. B 9. A 17. C 25. C 32. A

 2. B 26. D
3. C 10. C 18. B 27. D 33. B
4. A 11. A 19. A 28. A 34. B
5. C 12. C 20. B 35. B
29. A
6. B 13. C 21. B 30. B 36. A
7. A 14. B 22. C
8. C 31. B 37. C
15. C 23. A
16. B 38. A
24. A

39. C 46. A 54. B 62. A 70. B

40. B 47. D 55. C 63. A 71. A
41. B 48. D 56. B 64. A 72. A
42. C 49. D 57. C 65. B 73. D
43. C 50. B 58. D 66. D 74. C
44. B 51. C 59. C 67. C 75. C
45. D 52. C 60. B 68. B 76. D
53. A 61. B 69. D

Part II. Matching A and B

Column A Column B
_____ 1. Candela A. Optical transducer
B. Steeper motor
______2. Error signal
C. Luminous intensity
______3. Transducer signal D. Sense for conductive material
E. Algebraic sun of reference signal & feedback
______4. Truly digital & its output
signal
______5. Photo voltaic devices F. Sensor
G. The combination of mechanical, electrical,
______6. Inductive sensor
electronics, & programming
______7. Damper H. Sense limit space
I. Oscillation absorber
______8. IEC
J. System international
_____9. Mechatronics K. Motor with desired speed control
L. Resistance transducer
_____10. Negative feedback
M. With feedback
_____11. Proximity switch N. British system
O. Absolute error
_____12. Metric unit
P. International electro technical control
 _____13. Servo motor Q. output affect input
R. without feedback
_____14. Passive transducer
S. Kilo byte
_____15. Closed control T. Thermistor

Answers key Part – II Matching

1. C 6. D 11.H
2. E 7. I 12.J
3. F 8. P 13.K
4. B 9. G 14.L
5. A 10.Q 15.M

Part III. Matching A and B

Column A Column B

____1. Controller (UC4)

A. Central heating boiler controlled only by a timer
____2. Disturbance (UC11) B. The lower end of the range

____3. Feedback (UC2) C. Declaration of a desired end state

D. Reconciles disagreements and relieves tensions
____4. Goal (UC1) E. Device that measures a variable condition
F. Period of time of use to ensure the equipment remains
____5. Tolerance (UC5, 10)
reliable
____6. Zero value (UC10) G. Signal that tends to adversely affect the valve of the output
of a system
____7. Harmonizing (UC16) H. Error in measurement
I. The output of a system that is returned to modify the input
____8. Open-loop control system (UC11)
J. Permissible deviation from a specified value
____9. Silencer (UC4) K. Automatic water level controller
L. Device used to control the flow of fluids such as
____10. Damper (UC11) Steam or water
M. Rectifier
____11. Uncertainty (UC10) N. Device used to control the flow of air in a duct or through a
wall louver.
____12. Calibration interval (UC10) O. Voltage multiplier

____13. Control valve (UC9) P.

____14. Water separator automatic drain
Q.
(UC9)

____15. Closed-loop system (UC11)

R.
Part -III-Matching A and B
1. E 2. G 3. I 4. C 5. J 6. B 7. D 8. A 9. P 10. N 11. H 12. F 13. L 14. R 15. K

Part IV. Matching A and B

Column A Column B
____1. DC motor with constant speed A. Henry
____2. Motor with high starting Torque B. Spindle motor
C. Varistor
____3. Current limiting Device
D. Memory
____4. Used to store program& data in computer system E. .Effective communication
F. Initiative
____5. Proper Attitude toward work
G. DC Series Motor
____6. Performance of operation or quality of product or H. Shunt Motor
service to ensure customer satisfaction is monitored I. Feed Back
J. Hard Disk Driver
____7. Constrictive & Encouraging idea for improvement K. Quality control
____8. Voltage Transformer L. Successful Team Work
M.
____9. Current Transformer

____10. Washing Machine

N.
____11. The unit of Inductance O.
____12. Rectifier

____13. Invertor
P.
____14. Team Member understand How their tasks fit in with

other people’s tasks

Q.
____15. Each members co-operating with Everyone and

assisting others when they need help

Answer Part -IV-Matching A and B

1. H 2. G 3. C 4. J 5. F 6. K 7. I 8. R 9. Q 10. M 11. A 12. O 13. P 14. E 15. L

Part V. Matching A and B

Column A Column B
1. Candela A. Optical transducer
2. Error signal B. B. Steeper motor
C. C. Luminous intensity
3. Transducer signal
D. Sense for conductive materials
4. Photovoltaic devices E. E. Algebraic sum of reference
5. Inductive sensor F. F. Sensor
6. Damper G. G. The combination of marchers
7. IEC H. H. Sense limit space
8. Mechatronics I. I. Oscillation observer
J. J. System international
9. Negative feedback
K. K. Motor desired speed control
10. Proximity switch L. I. Resistance transducer
11. Metric unit M. M. With feedback
12. Servo motor N. N. British system
13. Passive transducer O. Absolute error
P. International Electro Technical
14. Closed control
Commission
Q. Output affect input
R. Without feedback
S. Kilo but
T. Thermistor
 Answer Part -V-Matching A and B
1. C 2. E 3. F 4. A 5. D 6. I 7. P 8. G 9. Q 10. H 11. J 12. K 13. L 14. M

Mechatronics Level-VI COC

CHOOSE THE CORRECT ANSWER

1. The power developed in a circuit using energy at the rate of 500 joule per second is
A. 5w B.
B. 50w C.
C. 500w D.
D. 5kw
2. A potential difference of 1 volt is equal to
A. One amp per ohm
B. One amp per second
C. One amp – ohm
D. One amp per joule
3. In wind power generator, the wind is
A. A field
B. An armature
C. A prime over
D. A rotor
4. An auto transformer has
A. More turns on the primary than on the secondary
B. More turns on the secondary then on the primary
C. More than one winding
D. Only one winding
5. Transformer has 1600 turns in the secondary, when a voltage of 16v is applied to the primary, an
emf of 80v is induced in the secondary. The number of turns in the primary is
A. 320
B. 3200
C. 800
D. 8000
6. A “step up” transformer is one which has
A. More turns on the primary than on the secondary
B. More turns on the secondary then on the primary
C. Larger primary voltage than secondary voltage
D. Larger secondary current than primary
7. Which of the following is not about wattmeter?
 A. It is used to measure electric power
B. It is a combination of both a voltmeter & an ammeter
C. It is used to measure both voltage & current at the same time
D. It is used to measure electric energy
8. One of the following is about an AC circuit with resistive load
A. VA > watt
B. VAR > VA
C. VA = watt
D. watt > VA
9. In 3-phase motor control system power circuit, the color of neutral conductor is
A. White
B. Black
C. Yellow & Green
D. None
10.The basic of operation of transformer is the effect of
A. Self – inductance C
B. Mutual – inductance
C. Coupled – inductance
D. Decoupled – inductance
11.Of the following circuit reactive element is obtained in
A. Filament lamp
B. Cooking stove
C. Lamp ballast
D. None
12. In single – phase motor the start winding may remain in circuit after start, this is due to
A. Short in the run winding
B. Stationary switch remains closed
C. Short in the start winding
D. None of the above
13.In delta connected three - phase generator, if one phase is opened
A. It stops generating
B. It generates the rated output
C. It generates under the rated output
D. It is burned
14.To reverse rotation direction of DC compound motor
A. Reverse leads to the armature
B. Reverse leads to series field coil
C. Reverse leads to shunt field coil
D. Reverse leads to both armature & field coils
15. The moving part in a relay is called
A. A slip ring
B. The yoke
C. Moving coil
D. An armature
16.Which is not included in the function of the motor control circuit?
A. Change the supply frequency
B. Protect the motor from overloading
C. Change the direction of rotation of the motor
D. Used to minimize the drawn current during starting period
E. Used to protect the motor from the short circuit
17. The efficiency of an electrical machine is:
A. The ratio between output power & input power
B. The ratio between active power & apparent power
C. The ratio between starting torque & maximum torque
D. The ratio between rotor speed & rotation field speed
E. The ratio between rotor speed & the maximum torque
18. Which of the following is not included in the group of reduced voltage magnetic starter?
A. Start-delta magnetic starter
B. Auto-transformer magnetic starter
C. Primary resistance magnetic starter
D. Part-winding magnetic starter
E. Reverse-forward magnetic starter
19. The stator core of a single phase alternator is laminated?
A. To increase the resistance of the stator core
B. To create reactance
C. To increase eddy currents
D. To eliminate eddy current
E. To dissipate heat
20. In star-delta three phase motor. Which among the group is the correct pair of terminals
connection?
A. W2 & W1 for L1 V1 & U2 for L2 W2 & V2 for L3
B. U1 & U2 for L1 V1 & V2 for L2 W1 & V2 for L3
C. U1 & W2 for L1 V1 & U2 for L2 W1 & V2 for L3
D. U2 & V2 for L1 V1 & W1 for L2 U1 & W2 for L3
E. V1 & W2 for L1 V1 & U1 for L2 W1 & U2 for L3
 Answers key Part – VI

1. C 5. A 9. B 13.D 17.A
2. C 6. B 10.* 14.A 18.E
3. * 7. * 11.* 15.D 19.D
4. D 8. * 12.B 16.A 20.C

Project 1
Draw ladder Diagram in to logo soft three motors in sequential run and show function
(three motor sequential control use by timer)

What is the Advantages of Analog Instrument?

Following are the benefits or advantages of Analog Multimeter: ➨They are cheaper compare
to digital meters. ➨They respond very quickly to measurement. ➨They do not require batteries
unless resistance needs to be measured.
The display set any value between 0% and 100%

How is electrical resistance measured?

Resistance is a measure of the opposition to current flow in

an electrical circuit. Resistance is measured in ohms, symbolized by the Greek letter
omega (Ω). ... All materials resist current flow to some degree.

How do you measure electric voltage?

How to measure ac voltage
2. Turn the dial to ṽ. Some digital multimeter (DMMs) also include m ṽ. ...
3. First insert the black lead into the COM jack.
4. Next insert the red lead into the VΩ jack. ...
5. Connect the test leads to the circuit: black lead first, red second. ...
6. Read the measurement in the display.
Analog-to-digital converters (ADCs) translate analog signals into digital values for use in processing and
control systems. Our portfolio of ADCs offers high speed devices with sampling speeds up to 10.4 GSPS
and precision devices with resolution up to 32-bit, in a range of packaging options for industrial,
automotive, medical, communication, enterprise and personal electronics applications.