MCQOPTIONS
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MCQOPTIONS
This section includes 346 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
The register that may be used as an operand register is |
| A. | accumulator |
| B. | b register |
| C. | data register |
| D. | accumulator and b register |
| Answer» E. | |
| 152. |
How many coils are required to make LVDT? |
| A. | 4 |
| B. | 6 |
| C. | 3 |
| D. | 2 |
| Answer» D. 2 | |
| 153. |
The type of sensor that detects the analyte species directly through their characteristic spectral properties is called |
| A. | chemical sensor |
| B. | thermal sensor |
| C. | light sensor |
| D. | spectroscopic sensors |
| Answer» E. | |
| 154. |
On the bases of application of optic fiber sensor, which of the following is not considered to be the classification of fiber optic sensor? |
| A. | biomedical/photometric sensors |
| B. | physical sensors |
| C. | thermal sensors |
| D. | chemical sensors |
| Answer» D. chemical sensors | |
| 155. |
In which of the following optic fiber sensor the fiber is simply used to carry light to 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 | |
| 156. |
Optical fiber sensors are not immune to electromagnetic disturbances. |
| A. | true |
| B. | false |
| Answer» C. | |
| 157. |
Optical fiber sensors are electrically |
| A. | active |
| B. | passive |
| C. | active as well as passive |
| D. | cannot be determined |
| Answer» C. active as well as passive | |
| 158. |
Optical fibers are not immune to |
| A. | electronic disturbances |
| B. | magnetic disturbances |
| C. | ambient light interference |
| D. | electromagnetic disturbances |
| Answer» D. electromagnetic disturbances | |
| 159. |
Which sensor is linear and low accuracy? |
| A. | thermistor |
| B. | resistance thermometer |
| C. | thermocouple |
| D. | semiconductor based sensor |
| Answer» E. | |
| 160. |
Which type of temperature sensor is placed in Integrated Circuits? |
| A. | thermistor |
| B. | resistance thermometer |
| C. | thermocouple |
| D. | semiconductor based sensor |
| Answer» E. | |
| 161. |
                 consists of two different metals connected at two points. |
| A. | thermistor |
| B. | resistance thermometer |
| C. | thermocouple |
| D. | semiconductor based sensor |
| Answer» D. semiconductor based sensor | |
| 162. |
                 measures temperature by correlating the resistance of the RTD with temperature. |
| A. | thermistor |
| B. | resistance thermometer |
| C. | thermo couple |
| D. | semiconductor based sensor |
| Answer» C. thermo couple | |
| 163. |
A Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â is thermally sensitive resistor that exhibits a large change in resistance. |
| A. | thermistor |
| B. | resistance thermometer |
| C. | thermo couple |
| D. | semiconductor based sensor |
| Answer» B. resistance thermometer | |
| 164. |
Line of sight of wireless sensor tag is |
| A. | 750ft |
| B. | 700ft |
| C. | 500ft |
| D. | 550ft |
| Answer» C. 500ft | |
| 165. |
What is STSC1? |
| A. | pressure sensor |
| B. | temperature sensor |
| C. | touch sensor |
| D. | humidity sensor |
| Answer» C. touch sensor | |
| 166. |
What is DS18B20? |
| A. | pressure sensor |
| B. | touch sensor |
| C. | humidity sensor |
| D. | temperature sensor |
| Answer» E. | |
| 167. |
Electric motor protection has which sensor? |
| A. | pressure sensor |
| B. | touch sensor |
| C. | temperature sensor |
| D. | humidity sensor |
| Answer» D. humidity sensor | |
| 168. |
Which sensor is used for monitor electric distribution and switching equipment temperature? |
| A. | lm35 |
| B. | esp8266 |
| C. | dht11 |
| D. | rfm3200 |
| Answer» E. | |
| 169. |
Which of the following is the Wireless battery-free sensor? |
| A. | lm35 |
| B. | rfm3200 |
| C. | esp8266 |
| D. | dht11 |
| Answer» C. esp8266 | |
| 170. |
Monnit temperature sensor is used for what? |
| A. | accurate results |
| B. | to measure the temperature at high degree |
| C. | temperature sensor |
| D. | pressure sensor |
| Answer» B. to measure the temperature at high degree | |
| 171. |
How many pins does temperature sensor have? |
| A. | 5 legs |
| B. | 2 legs |
| C. | 4 legs |
| D. | 3 legs |
| Answer» E. | |
| 172. |
which sensor is LM35? |
| A. | pressure sensor |
| B. | humidity sensor |
| C. | temperature sensor |
| D. | touch sensor |
| Answer» D. touch sensor | |
| 173. |
What is ESP8266? |
| A. | wifi module |
| B. | sensor |
| C. | board |
| D. | usb cable |
| Answer» B. sensor | |
| 174. |
Hall Effect transducer can be used to measure |
| A. | magnetic field |
| B. | angular displacement |
| C. | linear displacement |
| D. | all of the mentioned |
| Answer» E. | |
| 175. |
Hall Effect transducers attain equilibrium instantaneously. |
| A. | true |
| B. | false |
| Answer» C. | |
| 176. |
Which of the following represents the output of Hall Effect transducer? |
| A. | hall potential |
| B. | emf |
| C. | applied voltage |
| D. | lorentz voltage |
| Answer» B. emf | |
| 177. |
Which of the following represents correct expression for Lorentz force? |
| A. | bev |
| B. | bv |
| C. | ev |
| D. | b |
| Answer» B. bv | |
| 178. |
Force exerted by magnetic field in Hall Effect transducers is |
| A. | lorentz force |
| B. | hall effect force |
| C. | magnetic force |
| D. | electric force |
| Answer» B. hall effect force | |
| 179. |
Hall Effect is clearly visible in |
| A. | pure conductors |
| B. | semiconductors |
| C. | super conductors |
| D. | metals |
| Answer» C. super conductors | |
| 180. |
Hall potential is inversely proportional to magnetic flux density. |
| A. | true |
| B. | false |
| Answer» C. | |
| 181. |
Which of the following represents the correct expression of Lorentz force? |
| A. | eh/b |
| B. | eeh/b |
| C. | eeh |
| D. | none of the mentioned |
| Answer» C. eeh | |
| 182. |
Hall Effect is a/an |
| A. | electronic |
| B. | magnetic |
| C. | galvanic |
| D. | ionizing |
| Answer» D. ionizing | |
| 183. |
Ultrasonic testing is destructive testing? |
| A. | true |
| B. | false |
| Answer» C. | |
| 184. |
The object under inspection must have parallel surfaces. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 185. |
What is a type of piezoelectric crystal? |
| A. | natural |
| B. | normal |
| C. | angle |
| D. | transverse |
| Answer» B. normal | |
| 186. |
Which of the following is the best transmitter of sound? |
| A. | oil |
| B. | aluminum |
| C. | steel |
| D. | copper |
| Answer» D. copper | |
| 187. |
What is the drawback of ultrasonic testing? |
| A. | low depth |
| B. | high sensitivity |
| C. | shape restriction |
| D. | higher errors |
| Answer» C. shape restriction | |
| 188. |
Which of the following is the poorest transmitter of sound? |
| A. | oil |
| B. | water |
| C. | air |
| D. | copper |
| Answer» D. copper | |
| 189. |
What is acoustic impedance (in MPa s/m) of aluminum? |
| A. | 1.58 |
| B. | 45.72 |
| C. | 16.77 |
| D. | 41.08 |
| Answer» D. 41.08 | |
| 190. |
Standard penetration depth varies from material to material. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 191. |
ECI is only used for ferromagnetic materials. |
| A. | true |
| B. | false |
| Answer» C. | |
| 192. |
What is the reason for the limitation of depth below 6mm in ECI? |
| A. | surface coating |
| B. | electron hole pair generation |
| C. | skin effect |
| D. | residual stresses |
| Answer» D. residual stresses | |
| 193. |
The total resistance of the coil of ECI is known as |
| A. | impedance |
| B. | inductance |
| C. | reactance |
| D. | capacitance |
| Answer» B. inductance | |
| 194. |
ECI is generally restricted to a depth below |
| A. | 1µm |
| B. | 1mm |
| C. | 2mm |
| D. | 6mm |
| Answer» E. | |
| 195. |
What principle defines eddy current inspection (ECI)? |
| A. | lenz law |
| B. | biot-savart law |
| C. | electromagnetic induction principle |
| D. | faraday’s law |
| Answer» D. faraday’s law | |
| 196. |
Proper bonding causes errors in strain gauges. |
| A. | true |
| B. | false |
| Answer» C. | |
| 197. |
Proper functioning of a strain gauge depends on |
| A. | strain |
| B. | stress |
| C. | bonding |
| D. | length of wire |
| Answer» D. length of wire | |
| 198. |
Cement is classified under |
| A. | 4 types |
| B. | 2 types |
| C. | 6 types |
| D. | 8 types |
| Answer» C. 6 types | |
| 199. |
Bonding element in a strain gauge must have |
| A. | zero insulation resistance |
| B. | low insulation resistance |
| C. | high insulation resistance |
| D. | infinite insulation resistance |
| Answer» D. infinite insulation resistance | |
| 200. |
Commonly used elements for wire strain gauges are |
| A. | nickel and copper |
| B. | nickel and gold |
| C. | gold and brass |
| D. | silver and aluminium |
| Answer» B. nickel and gold | |