McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Mechanical Engineering .
| 1. |
A discrepancy is |
| A. | The difference between a measurement and true value of the quantity measured |
| B. | The difference between true value of the quantity and error |
| C. | The difference between the measured value and actual value |
| D. | The difference between the measured values of the same quantity |
| E. | None of the above |
| Answer» D. The difference between the measured values of the same quantity | |
| 2. |
One of more electronic tubes are used in the circuitry of a VTVM for |
| A. | amplification |
| B. | rectification |
| C. | both for amplification and rectification |
| D. | None of the above |
| E. | Any of the above |
| Answer» C. both for amplification and rectification | |
| 3. |
Which of the following thermocouple can be used for temperatures above 1000?C |
| A. | Platinum - Rhodium |
| B. | Chromel - Alumel |
| C. | High pressure Chromel - Copper |
| D. | Any of the above |
| E. | None of the above |
| Answer» A. Platinum - Rhodium | |
| 4. |
The advantage of digital instruments is |
| A. | No observational error |
| B. | Faster reading |
| C. | Output can be fed to a memory circuit |
| D. | Better accuracy |
| E. | All of the above |
| Answer» E. All of the above | |
| 5. |
The standard sulphur point temperature is |
| A. | 212?C |
| B. | 444.60?C |
| C. | 666.80?C |
| D. | 100?C |
| E. | 999.99?C |
| Answer» B. 444.60?C | |
| 6. |
Odometer is used to measure |
| A. | Distances |
| B. | Threshold odours |
| C. | Composition of gases |
| D. | Velocities and accelerations |
| E. | Suspended solids in a gas |
| Answer» A. Distances | |
| 7. |
Accuracy of mesurements depends upon |
| A. | precision of technique |
| B. | precision of instruments employed |
| C. | good planning of instruments |
| D. | all of above |
| E. | Any of the above |
| Answer» D. all of above | |
| 8. |
A three digit 0 - 1 V digital voltmeter will have a resolution of |
| A. | 0.1 V |
| B. | 1 mV |
| C. | 1, A |
| D. | 1/2 V |
| E. | 1 |
| Answer» B. 1 mV | |
| 9. |
Which of the following materials has maximum resistivity |
| A. | Nichrome |
| B. | Isoeleastic |
| C. | Karma |
| D. | None of the above |
| E. | Any of the above |
| Answer» B. Isoeleastic | |
| 10. |
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» C. Reciprocal of resistance | |
| 11. |
Loading error in a system can be classified as |
| A. | Systematic error |
| B. | error of judgement |
| C. | illegitimate error |
| D. | None of the above |
| E. | Any of the above |
| Answer» A. Systematic error | |
| 12. |
A piezometer is used to measure |
| A. | Very low pressures |
| B. | High pressures |
| C. | Pressure differential |
| D. | Pressures above and below atmospheric pressure |
| E. | Atmospheric pressures |
| Answer» A. Very low pressures | |
| 13. |
Range of temperature measurement of a resistance thermometer is |
| A. | ? 50? F to 200? F |
| B. | ? 100? F to 400? F |
| C. | ? 200? F to 800? F |
| D. | ? 400? F to 1800? F |
| E. | Any of the above |
| Answer» D. ? 400? F to 1800? F | |
| 14. |
The pH value of pure water could be |
| A. | 1 |
| B. | 7 |
| C. | 10 |
| D. | 0 |
| E. | 14 |
| Answer» B. 7 | |
| 15. |
The sensitivity accuracy of an instrument depends on |
| A. | Frequency response |
| B. | Amplitude distortion |
| C. | Tempearature variations |
| D. | Hysteresis |
| E. | None of the above |
| Answer» C. Tempearature variations | |
| 16. |
Mcleod gauge is used to measure |
| A. | pH value |
| B. | Pressure |
| C. | Vacuum |
| D. | Flow rate |
| E. | Suspended matter |
| Answer» C. Vacuum | |
| 17. |
The material used in the construction of a thermistor is |
| A. | Nickel oxide |
| B. | Iron oxide |
| C. | Nickel |
| D. | None of the above |
| E. | Any of the above |
| Answer» A. Nickel oxide | |
| 18. |
A magneto-strictive transducer works on the principle of variations of |
| A. | Permeability of magnetic materials when subjected to strain |
| B. | Resistance of material when subjected to strain |
| C. | Flux linkage of material when subjected to strain |
| D. | None of the above |
| E. | Manometer |
| Answer» A. Permeability of magnetic materials when subjected to strain | |
| 19. |
A right balance meter cannot measure |
| A. | Pressure |
| B. | Flow |
| C. | Mass flow rate |
| D. | All of the above |
| E. | None of the above |
| Answer» D. All of the above | |
| 20. |
Which of the following is the displacement type blow measuring device? |
| A. | Helix type |
| B. | Nutating disc |
| C. | Semi-rotary piston |
| D. | Reciprocating piston |
| E. | Turbine |
| Answer» E. Turbine | |
| 21. |
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» A. impregnated paper | |
| 22. |
The specific conductance of good quality raw water is |
| A. | 1 micro mho/cm |
| B. | 1000 micro mho/cm |
| C. | 0.1 micro mho/cm |
| D. | 10 micro mho/cm |
| E. | 100 micro mho/cm |
| Answer» E. 100 micro mho/cm | |
| 23. |
Which of the following phosphor bronze material is usually brazed? |
| A. | Beryllium copper |
| B. | Phosphor bronze |
| C. | Stainless steel |
| D. | K-monel |
| E. | Alloy steel |
| Answer» A. Beryllium copper | |
| 24. |
A temperature sensitive transducer is subjected to a sudden temperature change. It takes 18 seconds for the transducer to reach equilibrium condition (five times constant). The time taken by the transducer to read half of the temperature difference will be nearly |
| A. | 0.35 second |
| B. | 0.99 second |
| C. | 0.69 second |
| D. | 1.38 second |
| E. | 3.92 second |
| Answer» D. 1.38 second | |
| 25. |
A fathometer works on the principle of |
| A. | Reflection of magnetic waves |
| B. | Reflection of sound waves |
| C. | Reflection of ultrasonic waves |
| D. | Reflection of radio waves |
| E. | Reflection of gamma rays |
| Answer» B. Reflection of sound waves | |
| 26. |
A load cell cannot be used to measure |
| A. | Weight |
| B. | Temperature |
| C. | Level |
| D. | Pressure |
| E. | All of the above |
| Answer» B. Temperature | |
| 27. |
Thermistors have |
| A. | Zero temperature coefficient |
| B. | Low and positive temperature coefficient |
| C. | 14 |
| D. | High and negative temperature coefficient |
| E. | Low and negative temperature coefficient |
| Answer» D. High and negative temperature coefficient | |
| 28. |
The flow of non-conducting medium cannot be measured by |
| A. | Orifice |
| B. | Rotameter |
| C. | Electro magnetic meter |
| D. | Turbine meter |
| E. | All of the above |
| Answer» C. Electro magnetic meter | |
| 29. |
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» D. Any of the above | |
| 30. |
Which of the following standard can be used for defining length? |
| A. | Bar standard |
| B. | End standard |
| C. | Light wave standard |
| D. | Any of the above |
| E. | None of the above |
| Answer» D. Any of the above | |
| 31. |
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» B. Electrical draft | |
| 32. |
Platinum is used in resistance thermometers because of |
| A. | Low cost |
| B. | Low cost and high stability |
| C. | Low cost, high stability and wide operating range |
| D. | None of the above |
| E. | 14 |
| Answer» C. Low cost, high stability and wide operating range | |
| 33. |
Under force-current analogy, velocity is considered analogous to |
| A. | Voltage |
| B. | Inductance |
| C. | Resistance |
| D. | Magnetic flux |
| E. | None of the above |
| Answer» A. Voltage | |
| 34. |
To measure the speed of a shaft without physical contact the method used is |
| A. | Digital method |
| B. | Variable reluctance tachometer |
| C. | Stroboscope |
| D. | Any of the above |
| E. | All of the above |
| Answer» D. Any of the above | |
| 35. |
A measure of the system's ability to handle transients is known as |
| A. | Amplitude response |
| B. | Rise time |
| C. | Phase response |
| D. | All of the above |
| E. | Any of the above |
| Answer» B. Rise time | |
| 36. |
Contraction or expansion due to changes in temperature can be measured by |
| A. | Tellurometer |
| B. | Dilatometer |
| C. | Thermocouple |
| D. | Fathometer |
| E. | Optical pyrometer |
| Answer» B. Dilatometer | |
| 37. |
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» D. All of the above | |
| 38. |
Which of the following is the area meter? |
| A. | venturimeter |
| B. | orifice meter |
| C. | rotameter |
| D. | None of the above |
| E. | Any of the above |
| Answer» C. rotameter | |
| 39. |
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» D. Systematic error | |
| 40. |
Which of the following is not a source of power? |
| A. | Solar cell |
| B. | Photovoltaic cell |
| C. | Thermo-couple |
| D. | Photoelectric cell |
| E. | 15?C |
| Answer» C. Thermo-couple | |
| 41. |
A hot wire anemometer is used to measure |
| A. | Gas velocities |
| B. | Liquid discharges |
| C. | Pressure of gases |
| D. | Very low pressures |
| E. | Diameter of fine particles |
| Answer» A. Gas velocities | |
| 42. |
Freeqing point of mercury is |
| A. | ? 98.87?C |
| B. | ? 48.80?C |
| C. | ? 38.87?C |
| D. | None of the above |
| E. | Any of the above |
| Answer» C. ? 38.87?C | |
| 43. |
Which of the following transducers is preferred for measurements involving sound |
| A. | thermocouple |
| B. | Kundt's tube |
| C. | peizoelectric pick up |
| D. | None of the above |
| E. | Any of the above |
| Answer» C. peizoelectric pick up | |
| 44. |
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» C. Carbon steel | |
| 45. |
A load cell is essentially a |
| A. | Strain gauge |
| B. | Photo voltaic cell |
| C. | Thermistor |
| D. | Thermocouple |
| E. | Photoconductive device |
| Answer» A. Strain gauge | |
| 46. |
Bolometers are used for measurement of |
| A. | Thermal radiations |
| B. | Electromagnetic, radiations |
| C. | Manetic hysteresis loop area |
| D. | Intensity of light |
| E. | All of the above |
| Answer» A. Thermal radiations | |
| 47. |
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» E. Soft iron | |
| 48. |
Ceremets are |
| A. | resistance elements |
| B. | veriable capacitances |
| C. | variable inductances |
| D. | None of the above |
| E. | Any of the above |
| Answer» A. resistance elements | |
| 49. |
The standard silver point temperature is |
| A. | 1155.5?C |
| B. | 887.95?C |
| C. | 666?C |
| D. | 860.5?C |
| E. | 788.90?C |
| Answer» D. 860.5?C | |
| 50. |
The maximum allowable limit that a measurement may vary from the true value is known as |
| A. | expected error |
| B. | permissible error |
| C. | Range of error |
| D. | None of the above |
| E. | Any of the above |
| Answer» B. permissible error | |
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