MCQOPTIONS
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MCQOPTIONS
This section includes 124 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Resolution of a transducer depends on |
| A. | Material of wire |
| B. | Length of wire |
| C. | Diameter of wire |
| D. | Excitation voltage |
| Answer» D. Excitation voltage | |
| 52. |
The writing speed of fast storage oscilloscope is |
| A. | 2000 cm/s |
| B. | 1000 cm/s |
| C. | 1500 cm/s |
| D. | 2500 cm/s |
| Answer» B. 1000 cm/s | |
| 53. |
The draw backs of strain gauges areS1: Low fatigue lifeS2: They are expensive, brittle and sensitive to temperatureS3: Poor linearity |
| A. | S1 and S2 |
| B. | S2 and S3 |
| C. | S1 and S3 |
| D. | S1 only |
| Answer» C. S1 and S3 | |
| 54. |
Power amplifier is provided withS1: Cross over distortion compensationS2: Offset control |
| A. | S1 is true & S2 is false |
| B. | S2 is true & S1 is false |
| C. | Both S1 & S2 are true |
| D. | Both S1 & S2 are false |
| Answer» D. Both S1 & S2 are false | |
| 55. |
A galvanometer in series with a high resistance is called ___________. |
| A. | An ammeter |
| B. | A voltmeter |
| C. | A wattmeter |
| D. | None of the above |
| Answer» C. A wattmeter | |
| 56. |
Isolation amplifiers are also called as |
| A. | DC amplifier |
| B. | Output amplifier |
| C. | Inverting amplifier |
| D. | Iso-amps |
| Answer» E. | |
| 57. |
In wire wound strain gauges, the change in resistance is due to |
| A. | Change in diameter of the wire |
| B. | Change in length of the wire |
| C. | Change in both length and diameter |
| D. | Change in resistivity |
| Answer» D. Change in resistivity | |
| 58. |
Bonded wire strain gauges are |
| A. | Exclusively used for construction of transducers |
| B. | Exclusively used for stress analysis |
| C. | Used for both stress analysis and construction of transducer |
| D. | Pressure measurement |
| Answer» D. Pressure measurement | |
| 59. |
Raising input impedance of pre amplifier reduces |
| A. | Input current |
| B. | Output current |
| C. | Stray current |
| D. | Grid current |
| Answer» D. Grid current | |
| 60. |
The application of LVDT is |
| A. | Joint motion |
| B. | Finger movement |
| C. | Limb movement |
| D. | Heart wall motion |
| Answer» D. Heart wall motion | |
| 61. |
In an amplifier, the coupling capacitors are employed for |
| A. | Limiting the bandwidth |
| B. | Matching the impedance |
| C. | Preventing of Dc mixing with input or output |
| D. | Controlling the output |
| Answer» D. Controlling the output | |
| 62. |
Fidelity representsS1: Reproduction of signalS2: Reproduction of phase relation |
| A. | S1 and S2 are true |
| B. | S1 and S2 are false |
| C. | S1 false and S2 true |
| D. | S1 true and S2 false |
| Answer» E. | |
| 63. |
____________ fiber is used in interferometric instruments. |
| A. | Monomode |
| B. | Multimode |
| C. | Birefringent |
| D. | Coated |
| Answer» B. Multimode | |
| 64. |
A ___________ is usually a display device used to produce a paper record of analog wave form. |
| A. | Graphic pen recorder |
| B. | Electron microscope |
| C. | X-Y recorder |
| D. | Oscilloscope |
| Answer» B. Electron microscope | |
| 65. |
An ideal amplifier has |
| A. | Noise figure of 0 db |
| B. | Noise figure of more than 0 db |
| C. | Noise factor of unity |
| D. | Noise figure of less than 1 db |
| Answer» D. Noise figure of less than 1 db | |
| 66. |
Which of the following recorder gives slow response |
| A. | X-Y recorder |
| B. | Oscillographic |
| C. | Galvanometric |
| D. | Magnetic |
| Answer» D. Magnetic | |
| 67. |
What is the total resistance of a voltmeter on the 10 V range when the meter movement is rated for 50 µA of full-scale current? |
| A. | 10 kΩ |
| B. | 20 kΩ |
| C. | 200 kΩ |
| D. | None of the above |
| Answer» D. None of the above | |
| 68. |
The transducers which requires an external power and their output is a measure of some variation such as resistance, inductance, capacitance etc., are called as |
| A. | Active transducer |
| B. | Primary sensor |
| C. | Passive transducer |
| D. | Self generating transducer |
| Answer» D. Self generating transducer | |
| 69. |
___________ amplifier is used to drive the recorder. |
| A. | Power amplifier |
| B. | Pre amplifier |
| C. | Operational amplifier |
| D. | Differential amplifier |
| Answer» B. Pre amplifier | |
| 70. |
Quartz and Rochelle salt belongs to ___________ of piezo-electric materials |
| A. | Natural group |
| B. | Synthetic group |
| C. | Natural or Synthetic group |
| D. | Fiber group |
| Answer» B. Synthetic group | |
| 71. |
Test electrode is also known as |
| A. | Indicator electrode |
| B. | Reference electrode |
| C. | Second electrode |
| D. | Primary electrode |
| Answer» B. Reference electrode | |
| 72. |
In a LVDT, the two secondary voltages |
| A. | Are independent of the core position |
| B. | Vary unequally depending on the core position |
| C. | Vary equally depending on the core position |
| D. | Are always in phase quadrature |
| Answer» C. Vary equally depending on the core position | |
| 73. |
Function of microscope isS1: To magnify object, under observationS2: To resolve the object |
| A. | S1 is true & S2 is false |
| B. | S2 is true & S1 is false |
| C. | Both S1 & S2 are true |
| D. | Both S1 & S2 are false |
| Answer» D. Both S1 & S2 are false | |
| 74. |
The amplifier which has no drift is called as |
| A. | Differential amplifier |
| B. | DC amplifier |
| C. | Single ended amplifier |
| D. | Chopper amplifier |
| Answer» E. | |
| 75. |
For display of signal pattern ___________ voltage is applied to the horizontal plates of a CRO |
| A. | Sinusoidal |
| B. | Rectangular |
| C. | Sawtooth |
| D. | None of the above |
| Answer» D. None of the above | |
| 76. |
Pressure transducer for measuring blood pressure is |
| A. | Strain gauge transducer only |
| B. | Strain gauge or capacitive transducer |
| C. | Resistive transducer |
| D. | Fiber optic transducer |
| Answer» C. Resistive transducer | |
| 77. |
Duration of rotation of pen in the PMMC system depends upon ___________. |
| A. | Phase angle |
| B. | Frequency |
| C. | Magnitude |
| D. | Direction |
| Answer» E. | |
| 78. |
In phase response of a recorder noise level ___________ with the band width of a system |
| A. | Increases |
| B. | Decreases |
| C. | Reaches unity |
| D. | Reaches infinity |
| Answer» B. Decreases | |
| 79. |
Power gain in decibels is equal to voltage gain in decibels only when |
| A. | Input impedance is equal to output impedance |
| B. | Output impedance is zero |
| C. | Never |
| D. | Input impedance is zero |
| Answer» B. Output impedance is zero | |
| 80. |
The resistance of an ideal voltmeter is ___________ |
| A. | Low |
| B. | Infinite |
| C. | Zero |
| D. | High |
| Answer» C. Zero | |
| 81. |
A galvanometer of resistance G is shunted by a very small resistance S. The resistance of the resulting ammeter is ___________ |
| A. | GS/(G+S) |
| B. | G+S |
| C. | G-S |
| D. | None of the above |
| Answer» B. G+S | |
| 82. |
Certain type of materials generates an electrostatic charge or voltage when mechanical force is applied across them. Such materials are called |
| A. | Piezo-electric |
| B. | Photo-electric |
| C. | Thermo-electric |
| D. | Photo-resistive |
| Answer» B. Photo-electric | |
| 83. |
A transducer that converts measurand into the form of pulse is called |
| A. | Active transducer |
| B. | Analog transducer |
| C. | Digital transducer |
| D. | Pulse transducer |
| Answer» E. | |
| 84. |
Two multimeters A and B have sensitivities of 10 kΩ/V and 30 kΩ/V respectively. Then ___________. |
| A. | Multimeter A is more sensitive |
| B. | Multimeter B is more sensitive |
| C. | Both are equally sensitive |
| D. | None of the above |
| Answer» C. Both are equally sensitive | |
| 85. |
When a number of components are fabricated on same IC chip it is necessary to provide isolation between two different components for input interconnection is called __________. |
| A. | Input amplification |
| B. | Input differentiation |
| C. | Common mode rejection |
| D. | Input isolation |
| Answer» E. | |
| 86. |
The input resistance of a VTVM is about ___________. |
| A. | 1000 O |
| B. | 10 kΩ |
| C. | 20 kΩ |
| D. | 10 MO |
| Answer» E. | |
| 87. |
LVDT windings are wound on |
| A. | Steel sheets |
| B. | Aluminium |
| C. | Ferrite |
| D. | Copper |
| Answer» D. Copper | |
| 88. |
Pre amplifier isolation in ECG circuit is to |
| A. | Increase input impedance |
| B. | Decrease input impedance |
| C. | Increase output impedance |
| D. | Decrease output impedance |
| Answer» B. Decrease input impedance | |
| 89. |
The _________ of a recording system is the magnitude of input voltage required to produce a standard deflection in a recorded trace. |
| A. | Accuracy |
| B. | Linearity |
| C. | Sensitivity |
| D. | Resolution |
| Answer» D. Resolution | |
| 90. |
For biomedical applications the mostly used amplifier is |
| A. | Single ended amplifier |
| B. | Differential amplifier |
| C. | Inverting operational amplifier |
| D. | Chopper amplifier |
| Answer» C. Inverting operational amplifier | |
| 91. |
Photo multiplier consists of |
| A. | 1 Photo emissive cathode & 2 dynodes |
| B. | 2 Photo emissive cathodes & 2 dynodes |
| C. | 2 Photo emissive cathodes & 1 dynode |
| D. | 1 Photo emissive cathode & 1 dynode |
| Answer» B. 2 Photo emissive cathodes & 2 dynodes | |
| 92. |
The most accurate device for measuring voltage is ___________. |
| A. | Voltmeter |
| B. | Multimeter |
| C. | CRO |
| D. | VTVM |
| Answer» D. VTVM | |
| 93. |
A strain gauge is a passive transducer and is employed for converting. |
| A. | Mechanical displacement into a change of resistance |
| B. | Pressure into a change of resistance |
| C. | Force into a displacement |
| D. | Pressure into displacement |
| Answer» B. Pressure into a change of resistance | |
| 94. |
Piezo electric crystal can produce an emf |
| A. | When external mechanical force is applied to i |
| B. | When radiant energy stimulates the crystal |
| C. | When external magnetic field is applied |
| D. | When the junction of two such crystals are heated |
| Answer» B. When radiant energy stimulates the crystal | |
| 95. |
When either one of the inputs to the differential amplifier is equal to zero then it is said to be operated in |
| A. | Single ended mode |
| B. | Differential mode |
| C. | Non inverting mode |
| D. | Inverting mode |
| Answer» B. Differential mode | |
| 96. |
When the input of differential amplifier V1 = 0, then the differential amplifier is said to be operated in |
| A. | Common mode |
| B. | Differential mode |
| C. | Non inverting mode |
| D. | Inverting mode |
| Answer» D. Inverting mode | |
| 97. |
The decibel is a measure of |
| A. | Current |
| B. | Voltage |
| C. | Power |
| D. | Power level |
| Answer» E. | |
| 98. |
Venturi is associated with |
| A. | Venous blood pressure |
| B. | Digital plethysmography |
| C. | Dialysate flow in artificial kidney |
| D. | Blood flow in heart lung machine |
| Answer» E. | |
| 99. |
An electrometer amplifier has high input impedance of |
| A. | 10¹⁰Ω |
| B. | 10¹²Ω |
| C. | 10²⁰Ω |
| D. | 10¹⁴Ω |
| Answer» E. | |
| 100. |
The sensitivity of a multimeter is given in ___________. |
| A. | O |
| B. | Amperes |
| C. | kΩ/V |
| D. | none of the above |
| Answer» D. none of the above | |