MCQOPTIONS
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MCQOPTIONS
This section includes 222 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Measurements knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
A steel scale is slightly shorter when compared with a standard scale. This type of error is known as |
| A. | natural error |
| B. | systematic error |
| C. | instrumental error |
| D. | None of the above |
| E. | Any of the above |
| Answer» D. None of the above | |
| 152. |
The value of permissible error depends upon |
| A. | The scale |
| B. | The instrument available |
| C. | Class of work |
| D. | All of the above |
| E. | None of the above |
| Answer» E. None of the above | |
| 153. |
The 'dead time' of the instrument is |
| A. | The time required by an instrument for initial warming up |
| B. | The time required by an instrument to begin to respond to a change in the measured value |
| C. | The largest change of input quantity for which there is no output of the instrument |
| D. | None of the above |
| E. | 15?C |
| Answer» C. The largest change of input quantity for which there is no output of the instrument | |
| 154. |
A 4 |
| A. | 99999 |
| B. | 9999 |
| C. | 1000 |
| D. | 10000 |
| E. | 19999 |
| Answer» F. | |
| 155. |
A error that always follows the same definite mathematical or physical law is known as |
| A. | Detectable error |
| B. | Cumulative error |
| C. | Mathematical error |
| D. | Systematic error |
| E. | Physical error |
| Answer» E. Physical error | |
| 156. |
Natural error in measurement may be due to |
| A. | Humidity |
| B. | Temperature |
| C. | Wind |
| D. | Gravity |
| E. | Any of the above |
| Answer» F. | |
| 157. |
An error that under the same conditions will always be of the same size and sign is known as |
| A. | Mistake |
| B. | Detectable error |
| C. | Accidental error |
| D. | Systematic error |
| E. | Cumulative error |
| Answer» B. Detectable error | |
| 158. |
The statement 'the most probable value of an observed quantity available from a given lot of observations is the one for which the sum of the square of error is a minimum" is known as law of |
| A. | squared errors |
| B. | Pythagorous theorem |
| C. | least squares |
| D. | None of the above |
| E. | Any of the above |
| Answer» D. None of the above | |
| 159. |
In the above case the natural frequency be will |
| A. | 68 Hz |
| B. | 26 Hz |
| C. | 13 Hz |
| D. | 91 Hz |
| E. | 39 Hz |
| Answer» F. | |
| 160. |
Which of the following is an indirect method of pressure measurement |
| A. | McLeod gage |
| B. | Thermal conductivity gage |
| C. | Diaphragm |
| D. | All of the above |
| E. | Any of the above |
| Answer» E. Any of the above | |
| 161. |
If an error under the same conditions will always be of the same size and sign, it is known as |
| A. | Training errors |
| B. | Systematic errors |
| C. | Cumulative error |
| D. | Either of (A) and (B) above |
| E. | Either of (B) and (C) above |
| Answer» F. | |
| 162. |
Natural error in measurements is due variation in |
| A. | wind pressure |
| B. | humidity |
| C. | Temperature coefficient of liquids |
| D. | Any of the above |
| E. | Any of the above |
| Answer» E. Any of the above | |
| 163. |
Which of the following could be the source of random error in an instrument? |
| A. | Friction in instrument movement |
| B. | Backlash |
| C. | Mechanical vibrations |
| D. | Hysteresis in elastic members |
| E. | Any of the above |
| Answer» F. | |
| 164. |
1 watt is the same as |
| A. | 103 ergs/s |
| B. | 1010 ergs/s |
| C. | 106 ergs/s |
| D. | 105 ergs/s |
| E. | 107 ergs/s |
| Answer» F. | |
| 165. |
Which of the following device is primarily used to measure pressure? |
| A. | Bourdon tube |
| B. | Kundts tube |
| C. | Hygrometer |
| D. | Rotameter |
| E. | All of the above |
| Answer» B. Kundts tube | |
| 166. |
A thermometer has a time constant of 3.5 seconds. It is quickly taken from a temperature 0?C to water bath at 100?C. What temperature will be indicated after 1.5 second? |
| A. | 100?C |
| B. | 20?C |
| C. | 50?C |
| D. | 15?C |
| E. | 35?C |
| Answer» F. | |
| 167. |
For ocean sounding where the depth of water is too much and where continuous and accurate record of the depth of water below a boat or ship is to be made, the instrument generally used is known as |
| A. | Tellurometer |
| B. | Sound meter |
| C. | Sound box |
| D. | Fathometer |
| E. | dB meter |
| Answer» C. Sound box | |
| 168. |
In the above problem the thermal time constant will be |
| A. | 2.55 hrs |
| B. | 2.05 hrs |
| C. | 1 hour |
| D. | 1.44 hrs |
| E. | 3.36 hrs |
| Answer» E. 3.36 hrs | |
| 169. |
Which of the following is not a piezoelectric material? |
| A. | Quarz |
| B. | Sodium chloride |
| C. | Ammonium dihydrogen phosphate |
| D. | All of the above |
| E. | As dectors of gamma rays |
| Answer» C. Ammonium dihydrogen phosphate | |
| 170. |
Which of the following is a non-contact type thermometer? |
| A. | Alcohol thermometer |
| B. | Vapour pressure thermometer |
| C. | Optical pyrometer |
| D. | Thermocouple |
| E. | Bimetal strip thermometer |
| Answer» D. Thermocouple | |
| 171. |
Thermocouples are generally used for temperature measurements upto |
| A. | 500?C |
| B. | 1600?C |
| C. | 250?C |
| D. | 1000?C |
| E. | 2600?C |
| Answer» C. 250?C | |
| 172. |
Which of the following is not a self-generating transducer? |
| A. | Thermopile |
| B. | Ionization chamber |
| C. | Moving coil generator |
| D. | Photovoltaic cell |
| E. | All of the above |
| Answer» C. Moving coil generator | |
| 173. |
Temperature of a hot moving body can be measured by |
| A. | a radiation pyrometer |
| B. | an optical pyrometer |
| C. | a resistance thermometer |
| D. | None of the above |
| E. | Any of the above |
| Answer» C. a resistance thermometer | |
| 174. |
Elastic members such as Bourdon tube are used to |
| A. | change force into velocity |
| B. | change force into displacement |
| C. | change force into stress |
| D. | None of the above |
| E. | Any of the above |
| Answer» C. change force into stress | |
| 175. |
The standard gold point temperature is |
| A. | 1063?C |
| B. | 1360?C |
| C. | 1963?C |
| D. | 1630?C |
| E. | 1000?C |
| Answer» B. 1360?C | |
| 176. |
A polarograph is used for the analysis of |
| A. | solids |
| B. | liquids |
| C. | gases |
| D. | None of the above |
| E. | Any of the above |
| Answer» B. liquids | |
| 177. |
The amount of moisture in air is measured by |
| A. | Photo conductive cell |
| B. | Thermistor |
| C. | Single psychrometer |
| D. | Orsat apparatus |
| E. | Mass spectrometer |
| Answer» D. Orsat apparatus | |
| 178. |
Which of the following material has minimum gage factor |
| A. | Monel |
| B. | Manganin |
| C. | Constantan |
| D. | None of the above |
| E. | Any of the above |
| Answer» C. Constantan | |
| 179. |
Venturi tubes are generally made of |
| A. | stainless steel |
| B. | aluminium |
| C. | cast iron |
| D. | phosphor bronze |
| E. | Any of the above |
| Answer» E. Any of the above | |
| 180. |
The display of a digital numerical read out instrument is achieved by |
| A. | Photo tube |
| B. | Ionization of gases |
| C. | Light dependent resistors |
| D. | Heated filaments |
| E. | Light emitting diodes |
| Answer» B. Ionization of gases | |
| 181. |
Surface plates made of granite posses property |
| A. | are free from residual stresses |
| B. | there is less tendency for granite to creep |
| C. | granite does not corrode |
| D. | All of the above |
| E. | Any of the above |
| Answer» E. Any of the above | |
| 182. |
The thermometer is calibrated 150?C to 200?C. The accuracy is specified within |
| A. | 0.5?C |
| B. | 1?C |
| C. | ? 1?C |
| Answer» C. ? 1?C | |
| 183. |
Under the conditions when the depth of water is too much, to make a continuous record of the depth of water below a boat or ship, the instrument generally used is |
| A. | sound box |
| B. | fathometer |
| C. | d B meter |
| D. | None of the above |
| E. | Any of the above |
| Answer» C. d B meter | |
| 184. |
The accuracy of a 0 - 10 mV meter is |
| A. | 9 mV |
| B. | Either 9 mV or 10 mV |
| C. | Either 9 mV or 11 mV |
| D. | 11 mV |
| E. | More than 11 mV |
| Answer» D. 11 mV | |
| 185. |
Which of the following instrument is suitable for measuring the temperature of a red hot moving material like molten steel or molten cst iron? |
| A. | Gas thermometer |
| B. | Thermistor |
| C. | Thermocouple |
| D. | Radiation pyrometer |
| E. | All of the above |
| Answer» E. All of the above | |
| 186. |
The static error bank of an instrument does not include |
| A. | Hysteresis in the instrument |
| B. | Electrical draft |
| C. | Non-linearity |
| D. | All of the above |
| E. | None of the above |
| Answer» C. Non-linearity | |
| 187. |
The accuracy depends upon |
| A. | Precision of instrument |
| B. | Precision of method |
| C. | Good planning |
| D. | All of the above |
| E. | None of the above |
| Answer» E. None of the above | |
| 188. |
Which of the following material is used for photoconductive cells |
| A. | Selenium |
| B. | Thorium |
| C. | Mica |
| D. | Tungsten |
| E. | Barium sulphate |
| Answer» B. Thorium | |
| 189. |
A strain gauge with high sensitivity and high gauge factor is |
| A. | Nichrome transducer |
| B. | Platinum-tungsten alloy transducer |
| C. | Semi-conductor strain gauge transducer |
| D. | Stability and dynaloy strain gauge transducer. |
| E. | Difficulties in connections and high cost of auxiliary equipment |
| Answer» D. Stability and dynaloy strain gauge transducer. | |
| 190. |
Which of the following Bourdon tube material can be used for very high pressures? |
| A. | K-monel |
| B. | Alloy steel |
| C. | Phosphor bronze |
| D. | Stainless steel |
| E. | Beryllium copper |
| Answer» C. Phosphor bronze | |
| 191. |
Meter accuracy is determined by |
| A. | Least reading possible on the scale |
| B. | One fourth scale deflection |
| C. | Thickness of the pointer |
| D. | Half scale deflection |
| E. | Full scale deflection |
| Answer» F. | |
| 192. |
Which of the following is generally not used as a thermocouple material? |
| A. | Platinum - Rhodium |
| B. | Chromel - Alumel |
| C. | Gold - Silver |
| D. | Chromel - Copper |
| E. | None of the above |
| Answer» D. Chromel - Copper | |
| 193. |
Which of the following strain gauge material has the highest value of gauge factor? |
| A. | 1 |
| B. | Manganin |
| C. | Nichrome |
| D. | Constantan |
| E. | Soft iron |
| Answer» F. | |
| 194. |
The carrier material used with strain gauges at room temperature is |
| A. | Epoxy |
| B. | Bakelite |
| C. | Impregnated paper |
| D. | Iron cement |
| E. | Rubber |
| Answer» D. Iron cement | |
| 195. |
A thermistor is basically an instrument for the measurement of |
| A. | pressure |
| B. | flow |
| C. | speed |
| D. | temperature |
| E. | Any of the above |
| Answer» E. Any of the above | |
| 196. |
Which of the following magnetic material has least value of (B.H.)max? |
| A. | Alnico |
| B. | Cobalt steel |
| C. | Carbon steel |
| D. | 3.92 second |
| E. | Alcomax |
| Answer» D. 3.92 second | |
| 197. |
The fine wire of which material is most commonly used for resistance thermometer |
| A. | stainless steel |
| B. | Aluminium |
| C. | Nickel |
| D. | None of the above |
| E. | Any of the above |
| Answer» D. None of the above | |
| 198. |
The pH value of pure water could be |
| A. | 1 |
| B. | 7 |
| C. | 10 |
| D. | 14 |
| Answer» C. 10 | |
| 199. |
Under force-current analogy, viscous friction coefficient is considered analogous to |
| A. | Reciprocal of capacitance |
| B. | Reciprocal of inductance |
| C. | Reciprocal of resistance |
| D. | Reciprocal of current |
| E. | Resistance |
| Answer» D. Reciprocal of current | |
| 200. |
The carrier material used with strain gages at room temperatuer is |
| A. | impregnated paper |
| B. | bakelite |
| C. | epoxy |
| D. | None of the above |
| E. | Any of the above |
| Answer» B. bakelite | |