MCQOPTIONS
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MCQOPTIONS
This section includes 186 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Measurements knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Which of the following error is caused by a reversal of measured property? |
| A. | Hysterisis |
| B. | Noise |
| C. | Digitization error |
| D. | Quantization error |
| Answer» B. Noise | |
| 52. |
Sample and hold circuit are used in |
| A. | Analog to Digital modulation |
| B. | Digital to analog modulation |
| C. | Pulse position modulation |
| D. | All of the mentioned |
| Answer» E. | |
| 53. |
In AMR the resistance produced by scattering is_ _ _ _ __ when themagnetization direction is perpendicular to the current direction |
| A. | Zero |
| B. | Minimum |
| C. | Maximum |
| D. | infinite |
| Answer» C. Maximum | |
| 54. |
Based upon what parameters sensors will be chosen_ _ _ _ _ |
| A. | Environmental factors |
| B. | Economic factor |
| C. | Static characteristics |
| D. | All the above |
| Answer» E. | |
| 55. |
Sensors are used to detect the presence of any object without the need for anyphysical contact _ _ _ _ _ _ |
| A. | Motion sensor |
| B. | Heading sensor |
| C. | Proximity sensor |
| D. | Temperature sensor |
| Answer» D. Temperature sensor | |
| 56. |
Which of the following is correct for thermistors? |
| A. | Positive temperature coefficient of resistance |
| B. | Negative temperature coefficient of resistance |
| C. | Unpredictable temperature coefficient |
| D. | None of the mentioned |
| Answer» C. Unpredictable temperature coefficient | |
| 57. |
Optical gyroscopes - operate on the principle of the _ _ _ _ _ |
| A. | Mutual inductance |
| B. | Lenz law |
| C. | Faradays law |
| D. | Sagnac Effect |
| Answer» E. | |
| 58. |
Multichannel Analog Multiplexed System is __________ |
| A. | very fast |
| B. | fast |
| C. | slow |
| D. | moderate |
| Answer» D. moderate | |
| 59. |
How many satellites are used to gather the exact location using GPS? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 60. |
Sensor is a type of transducer. |
| A. | True |
| B. | False |
| C. | none |
| D. | none |
| Answer» B. False | |
| 61. |
Multichannel Analog Multiplexed System utilises time __________ |
| A. | using a transformer |
| B. | using a capacitor |
| C. | using a flip-flop |
| D. | using a mux |
| Answer» E. | |
| 62. |
Wheel speed sensors is the application of _ _ _ _ _ _ _ |
| A. | Load cell |
| B. | Strain gauge |
| C. | Magentoresistance |
| D. | Gyroscope |
| Answer» D. Gyroscope | |
| 63. |
Many channels can be monitored at the same time by __________ |
| A. | Demultiplexing |
| B. | A/D conversion |
| C. | Multiplexing |
| D. | D/A conversion |
| Answer» D. D/A conversion | |
| 64. |
Which one is the application of sensor? |
| A. | Home appliances |
| B. | Automobiles |
| C. | Manufacturing |
| D. | All the above |
| Answer» E. | |
| 65. |
LVDT is a _ _ _ _ _ |
| A. | Active transducer |
| B. | Passive transducer |
| C. | Both a) and b) |
| D. | None of the mentioned |
| Answer» C. Both a) and b) | |
| 66. |
LDR’s are also called _______________ |
| A. | Photo voltaic cell |
| B. | Photo resistive cell |
| C. | Photo emissive cell |
| D. | All of the mentioned |
| Answer» C. Photo emissive cell | |
| 67. |
Smallest change which a sensor can detect is ____________ |
| A. | Resolution |
| B. | Accuracy |
| C. | Precision |
| D. | Scale |
| Answer» B. Accuracy | |
| 68. |
A _ _ _ _ __ much more immune to noise than an analog signal |
| A. | Analog voltage |
| B. | PWM |
| C. | Serial digital |
| D. | All the above |
| Answer» C. Serial digital | |
| 69. |
Thermo couple cannot be used to measure ____________ |
| A. | Temperature of gas |
| B. | Temperature of liquid |
| C. | IR radiation |
| D. | None of the mentioned |
| Answer» E. | |
| 70. |
___________ is the field in which the nano particles are used with silica coatediron oxide iron oxide. |
| A. | Magnetic applications |
| B. | Electronics |
| C. | Medical diagnosis |
| D. | Structural and mechanical materials |
| Answer» D. Structural and mechanical materials | |
| 71. |
A ________ is thermally sensitive resistor that exhibits a large change inresistance. |
| A. | Thermistor |
| B. | Resistance Thermometer |
| C. | Thermo couple |
| D. | Semiconductor based sensor |
| Answer» B. Resistance Thermometer | |
| 72. |
In a measuring system quantity under measurement is termed as________________ |
| A. | Measurand |
| B. | Controllers |
| C. | Sensors |
| D. | Indicators |
| Answer» B. Controllers | |
| 73. |
_ _ _ _ _ is an analog position sensor that is absolute over a single turn. |
| A. | Synchros |
| B. | Resolver |
| C. | LVDT |
| D. | Microsyn |
| Answer» C. LVDT | |
| 74. |
Ultrasonic rangers are_ _ _ _ _ _ _ _ _ |
| A. | Transmitter |
| B. | Receiver |
| C. | Transponder |
| D. | Emitter |
| Answer» D. Emitter | |
| 75. |
_ _ _ _ _ _ are widely used in experimental stress analysis and diagnosis onmachines and failure analysis. |
| A. | Load cell |
| B. | Strain gauge |
| C. | Magentoresistance |
| D. | Gyroscope |
| Answer» C. Magentoresistance | |
| 76. |
In AMR the 45º alignment is commonly achieved by patterning _ _ _ _ _of highly conductive metal onto the more resistive AMR material |
| A. | Perpendicular stripes |
| B. | Parallel stripes |
| C. | Diagonal stripes |
| D. | Rectangle strips |
| Answer» D. Rectangle strips | |
| 77. |
______ Gyroscope was applied extensively in aircraft navigation. |
| A. | Mechanical |
| B. | MEMS |
| C. | Ring laser |
| D. | Fiber optic gyroscope |
| Answer» D. Fiber optic gyroscope | |
| 78. |
The output voltage is measured which is proportional to the distance travelled bythe _ _ _ _ _ |
| A. | Wiper/Jockey |
| B. | Conductive plastic |
| C. | Hybrid |
| D. | None of the above |
| Answer» B. Conductive plastic | |
| 79. |
The Hall Effect is possessed by ________ |
| A. | Metals |
| B. | Insulator |
| C. | Semiconductor |
| D. | both metals and semiconductor |
| Answer» E. | |
| 80. |
What is the full form of LASER? |
| A. | Light Absorbent and Stimulated Emission of Radiations |
| B. | Light Absorbing Solar Energy Resource |
| C. | Light Amplification by Stimulated Emission of Radiations |
| D. | Light Amplification of Singular Emission of Radiations |
| Answer» D. Light Amplification of Singular Emission of Radiations | |
| 81. |
Thermocouple is an example of _ _ _ _ _ _ sensor |
| A. | Modulating sensor |
| B. | Direct sensor |
| C. | Interrogating sensors |
| D. | None of the above |
| Answer» C. Interrogating sensors | |
| 82. |
In Stimulated Absorption, what is the lifetime of atoms ground state? |
| A. | 1 second |
| B. | 1 minute |
| C. | 1 hour |
| D. | Infinity |
| Answer» E. | |
| 83. |
Identify which type sensor? |
| A. | Potentiometer |
| B. | Accelerometer |
| C. | LVDT |
| D. | RVDT |
| Answer» C. LVDT | |
| 84. |
In a Multichannel Analog Multiplexed System __________ |
| A. | A/D converter is used |
| B. | D/A converter is used |
| C. | Sigma delta converter is used |
| D. | Modulator is used |
| Answer» B. D/A converter is used | |
| 85. |
_ _ _ _ _ _can be defined as the variation in the constant of proportionalitybetween the input physical quantity and the output electrical signal |
| A. | Resolution |
| B. | Accuracy |
| C. | Precision |
| D. | Linearity |
| Answer» E. | |
| 86. |
Probable error is due to _ _ _ _ _ _. |
| A. | Systematic error |
| B. | Gross error |
| C. | Random error |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 87. |
Unpredictable error _ _ _ _ __ |
| A. | Random error |
| B. | Gross error |
| C. | Systematic error |
| D. | Precision error |
| Answer» B. Gross error | |
| 88. |
The mercury in glass thermometer is an example of a _ _ _ _ _ _ orderinstrument |
| A. | Zero |
| B. | First |
| C. | Second |
| D. | Third |
| Answer» C. Second | |
| 89. |
The simplest model for a measurement system is a _ _ _ _ order differentialequation |
| A. | Zero |
| B. | First |
| C. | Second |
| D. | Third |
| Answer» B. First | |
| 90. |
A _ _ _ _ means that the sensor output is higher or lower than the ideal output. |
| A. | Offset |
| B. | Sensitivity |
| C. | Linearity |
| D. | Resolution |
| Answer» B. Sensitivity | |
| 91. |
_ _ _ _ _ _ is the closeness to true value |
| A. | Zero stability |
| B. | Accuracy |
| C. | Sensitivity |
| D. | Linearity |
| Answer» C. Sensitivity | |
| 92. |
In which of the following optic fiber sensor the fiber is simply used to carry lightto and from an external optical device where the sensing takes place? |
| A. | extrinsic fiber optic sensor |
| B. | energized fiber optic sensor |
| C. | all fibers are used to simply carry light to and from the external optical devices |
| D. | intrinsic fiber optic sensor |
| Answer» B. energized fiber optic sensor | |
| 93. |
Sensors Output signal types |
| A. | Analog voltage |
| B. | PWM |
| C. | Serial digital |
| D. | All the above |
| Answer» E. | |
| 94. |
In AMR the resistance produced by scattering is_ _ _ _ __ when the magnetization direction is parallel to the current direction |
| A. | Zero |
| B. | Minimum |
| C. | Maximum |
| D. | infinite |
| Answer» D. infinite | |
| 95. |
The operating principle of all mechanical gyroscopes is based on the ________ |
| A. | Ohm law |
| B. | conservation of angular momentum |
| C. | Faradays law |
| D. | Tesla principle |
| Answer» C. Faradays law | |
| 96. |
Amplified input signal is digitised through ________ |
| A. | A/D converters |
| B. | D/A converters |
| C. | Rectifiers |
| D. | Sigma delta modulators |
| Answer» B. D/A converters | |
| 97. |
Each satellite takes _ _ _ _ _in completing one full orbit and repeats the sameground track each day. |
| A. | 2 hour |
| B. | 12 hour |
| C. | 22 hour |
| D. | 24 hour |
| Answer» C. 22 hour | |
| 98. |
Data acquisition system can be used in __________ |
| A. | 10 ways |
| B. | 8 ways |
| C. | 4 ways |
| D. | 2 ways |
| Answer» E. | |
| 99. |
Gimbals are used for _____________ |
| A. | Improving rotational speed |
| B. | Supporting gyro wheel |
| C. | As damping agent |
| D. | None of the mentioned |
| Answer» C. As damping agent | |
| 100. |
Optical encoders are used to measure _ _ _ _ _ |
| A. | Angular positions |
| B. | Linear positions |
| C. | Both angular and linear positions |
| D. | None of the above |
| Answer» D. None of the above | |