McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Mechanical Engineering .
| 201. |
Venturi tubes are generally made of |
| A. | stainless steel |
| B. | aluminium |
| C. | cast iron |
| D. | phosphor bronze |
| E. | Any of the above |
| Answer» D. phosphor bronze | |
| 202. |
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» D. All of the above | |
| 203. |
The standard gold point temperature is |
| A. | 1063?C |
| B. | 1360?C |
| C. | 1963?C |
| D. | 1630?C |
| E. | 1000?C |
| Answer» A. 1063?C | |
| 204. |
Under force-current analogy, viscous friction coefficient is considered analogous to |
| A. | Reciprocal of resistance |
| B. | Reciprocal of inductance |
| C. | Reciprocal of capacitance |
| D. | Reciprocal of impedance |
| E. | None of the above |
| Answer» A. Reciprocal of resistance | |
| 205. |
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» B. change force into displacement | |
| 206. |
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» A. solids | |
| 207. |
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» B. Manganin | |
| 208. |
The carrier material used with strain gauges at room temperature is |
| A. | Epoxy |
| B. | Bakelite |
| C. | Impregnated paper |
| D. | Iron cement |
| E. | Rubber |
| Answer» C. Impregnated paper | |
| 209. |
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» C. Optical pyrometer | |
| 210. |
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» B. Sodium chloride | |
| 211. |
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» E. 35?C | |
| 212. |
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» A. Photo tube | |
| 213. |
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» C. Single psychrometer | |
| 214. |
Thermocouples are generally used for temperature measurements upto |
| A. | 500?C |
| B. | 1600?C |
| C. | 250?C |
| D. | 1000?C |
| E. | 2600?C |
| Answer» B. 1600?C | |
| 215. |
1 Joule is equal to |
| A. | 107 ergs |
| B. | 105 ergs |
| C. | 1010 ergs |
| D. | 1012 ergs |
| E. | 109 ergs |
| Answer» A. 107 ergs | |
| 216. |
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» E. 39 Hz | |
| 217. |
Spot the odd one out |
| A. | Difficulties in connections and high cost of auxiliary equipment |
| B. | Vacuum gauge |
| C. | Strain gauge |
| D. | Pirani gauge |
| E. | Compound pressure gauge |
| Answer» C. Strain gauge | |
| 218. |
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» A. Bourdon tube | |
| 219. |
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» E. 107 ergs/s | |
| 220. |
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» B. Ionization chamber | |
| 221. |
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» B. Sound meter | |
| 222. |
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» D. All of the above | |
| 223. |
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» D. 1.44 hrs | |
| 224. |
Odometer is used to measure |
| A. | threshold odours of gases |
| B. | composition of gases |
| C. | distances |
| D. | None of the above |
| E. | Any of the above |
| Answer» C. distances | |
| 225. |
The melting point of tungsten is around |
| A. | 2800?C |
| B. | 1256?C |
| C. | 3400?C |
| D. | 1156?C |
| E. | 4400?C |
| Answer» C. 3400?C | |
| 226. |
The reliability of an instrument means |
| A. | The maximum useful life of an instrument |
| B. | The service of an instrument between two repairs |
| C. | The range in which the characteristics of an instrument remain linear |
| D. | The degree to which repeatability continues to remain within specified limits |
| E. | None of the above |
| Answer» D. The degree to which repeatability continues to remain within specified limits | |
| 227. |
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» C. instrumental error | |
| 228. |
A 4 |
| A. | 99999 |
| B. | 9999 |
| C. | 1000 |
| D. | 10000 |
| E. | 19999 |
| Answer» E. 19999 | |
| 229. |
Which of the following material is used for photoconductive cells |
| A. | Selenium |
| B. | Thorium |
| C. | Mica |
| D. | Tungsten |
| E. | Barium sulphate |
| Answer» A. Selenium | |
| 230. |
A thermistor is basically an instrument for the measurement of |
| A. | pressure |
| B. | flow |
| C. | speed |
| D. | temperature |
| E. | Any of the above |
| Answer» D. temperature | |
| 231. |
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» B. The time required by an instrument to begin to respond to a change in the measured value | |
| 232. |
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» C. Nickel | |
| 233. |
Which of the following primary transducer does not convert velocity to pressure? |
| A. | Orifice |
| B. | Venture |
| C. | Pitot tube |
| D. | Vanes |
| E. | All of the above |
| Answer» D. Vanes | |
| 234. |
Which of the following flow measuring instrument is an area meter? |
| A. | Venturimeter |
| B. | Rotameter |
| C. | Pitot tube |
| D. | Hot wire anemometer |
| E. | None of the above |
| Answer» B. Rotameter | |
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