MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following transducer is used to translate linear motion into electrical signals? |
| A. | Bourdons tube |
| B. | LVDT |
| C. | Bellows |
| D. | Strain gauge |
| E. | Thermistor |
| Answer» C. Bellows | |
| 2. |
Which of the following instruments is preferred for the measurement of pressure in a steam condenser |
| A. | Kentometer |
| B. | McLeod gage |
| C. | Bourdon tube |
| D. | None of the above |
| E. | Any of the above |
| Answer» B. McLeod gage | |
| 3. |
The degree of perfection used in instruments, techniques are observations is known as |
| A. | Accuracy |
| B. | Precision |
| C. | Least Count |
| D. | None of the above |
| E. | Any of the above |
| Answer» C. Least Count | |
| 4. |
A first order system when subjected to a step input has a temperature rise of 25?C after one hour and 37.5?C after two hours, starting from cold conditions. The final steady temperature rise will be |
| A. | 5?C |
| B. | 15?C |
| C. | 35?C |
| D. | 25?C |
| E. | 50?C |
| Answer» F. | |
| 5. |
An accelerometer has a seismic mass of 0.05 kg and a spring constant of 3000 N/m. Maximum mass displacement is |
| A. | 120 m/s2 |
| B. | 2400 m/s2 |
| C. | 600 m/s2 |
| D. | 300 m/s2 |
| E. | 1200 m/s2 |
| Answer» F. | |
| 6. |
Main advantage of electrical measuring system over mechanical system is |
| A. | mass inertia effects are negligiole |
| B. | minimum effects of friction |
| C. | remote indication is possoble |
| D. | None of the above |
| E. | Any of the above |
| Answer» C. remote indication is possoble | |
| 7. |
Which of the following transducer is preferred for measurements involving sound? |
| A. | Piezoelectric pick up |
| B. | Photoemissive cell |
| C. | Volt box |
| D. | Kundt's tube |
| E. | Thermocouple |
| Answer» B. Photoemissive cell | |
| 8. |
In the process of manufacture of copper sheets, the thickness of the sheet is to be continuously monitored. Which transducer will be most suitable for this purpose? |
| A. | LVDT |
| B. | Strain gauge |
| C. | Photocell |
| D. | Any of the above |
| E. | None of the above |
| Answer» B. Strain gauge | |
| 9. |
The larget range through which the measurable variable can change without the change being indicated by the indicator is known as |
| A. | Probability error |
| B. | Time lag |
| C. | Dead zone |
| D. | Threshold sensitivity |
| E. | None of the above |
| Answer» D. Threshold sensitivity | |
| 10. |
The advantage of piezoelectric crystal as transducer is |
| A. | High frequency response |
| B. | High output |
| C. | Negligible phase shift |
| D. | Small size |
| E. | All of the above |
| Answer» F. | |
| 11. |
The lead zone is a certain pyrometer is 0.125 percent of span. The calibration is 400?C to 1000?C. What temperature change might occur before it is detected? |
| A. | 0.075?C |
| B. | 1.5?C |
| C. | 7.5?C |
| D. | 0.75?C |
| E. | 3?C |
| Answer» E. 3?C | |
| 12. |
Which of the following statement is wrong for thermocouple measuring instruments? |
| A. | They read average values |
| B. | When calibrated on dc they cannot be used for ac signals |
| C. | They cannot take overheads |
| D. | Their calibration dies not change with time or temperature |
| E. | They read rms values |
| Answer» C. They cannot take overheads | |
| 13. |
A copper-constantan thermocouple can be used for the range of temperature from |
| A. | ?212?C to 1000?C |
| B. | 0?C to 250?C |
| C. | ?175?C to 350?C |
| D. | 100?C to 250?C |
| E. | ?50?C to 300?C |
| Answer» D. 100?C to 250?C | |
| 14. |
The most sensitive thermocouple out of the following |
| A. | copper-constantan |
| B. | chromel-constantan |
| C. | iron-constantan |
| D. | None of the above |
| E. | Any of the above |
| Answer» C. iron-constantan | |
| 15. |
Thermocouple used in radio micrometer and thermo-galvanometer is |
| A. | Antimony - bismuth couple |
| B. | Copper constant couple |
| C. | Copper iron couple |
| D. | Iron - copper couple |
| E. | None of the above |
| Answer» B. Copper constant couple | |
| 16. |
An iron-constantan thermocouple can be used for the temperature |
| A. | ?175?C to 900?C |
| B. | ?250?V to 1500?C |
| C. | ?373?C to 1800?C |
| D. | 0?C to 2500?C |
| E. | 0?C to 600?C |
| Answer» B. ?250?V to 1500?C | |
| 17. |
The direction of current in case of antimony bismuth thermocouple will be |
| A. | From antimony to bismuth at the cold junction |
| B. | From antimony to bismuth at hot junction |
| C. | From bismuth to antimony at cold junction |
| D. | Any of the above |
| E. | None of the above |
| Answer» B. From antimony to bismuth at hot junction | |
| 18. |
Which of the following device cannot be used to measure pressure? |
| A. | Pirani gauge |
| B. | Strain gauge |
| C. | LVDT |
| D. | Manometer |
| E. | Bolometer |
| Answer» F. | |
| 19. |
Which of the following meter is preferred for the measurement of pressure in a steam condenser? |
| A. | Manometer |
| B. | Kentometer |
| C. | Pitot tube |
| D. | Mcleod gauge |
| E. | None of the above |
| Answer» C. Pitot tube | |
| 20. |
In a thermocouple, the potential between the two junctions is due to the temperature gradient along the conductors in the circuit. This effect is named as |
| A. | Peltier's effect |
| B. | Thomson's effect |
| C. | Seebeck effect |
| D. | none of the above |
| E. | Any of the above |
| Answer» C. Seebeck effect | |
| 21. |
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» D. None of the above | |
| 22. |
Which of the following device can be used to measure temperatures of hot bodies radiating energy in visible spectrum |
| A. | Bolometer |
| B. | Optical pigometer |
| C. | Thermopile |
| D. | Piezometer |
| E. | Planimeter |
| Answer» C. Thermopile | |
| 23. |
Under force-current analogy, displacement is considered as analogous to |
| A. | Voltage |
| B. | Magnetic flux linkage |
| C. | Induced emf |
| D. | Current |
| E. | Mutual inductance |
| Answer» C. Induced emf | |
| 24. |
A load cell cannot be used to measure |
| A. | Weight |
| B. | Temperature |
| C. | Level |
| D. | Pressure |
| E. | All of the above |
| Answer» C. Level | |
| 25. |
Which of the following has the number of significant figures other than 3? |
| A. | 0.346 K? |
| B. | 1.65 V |
| C. | 542 A |
| D. | 14 |
| E. | 4 x 102 |
| Answer» B. 1.65 V | |
| 26. |
A transducer which converts an input physical quantity into electrical output in the form of pulse is known as |
| A. | primary transducer |
| B. | analogous transducer |
| C. | digital transducer |
| D. | None of the above |
| E. | Any of the above |
| Answer» D. None of the above | |
| 27. |
The adhesion between the surface of property wrung gage blocks is of the order of |
| A. | 0-5 atmospheres |
| B. | 5-10 atmospheres |
| C. | 20-30 atmospheres |
| D. | none of the above |
| E. | Any of the above |
| Answer» D. none of the above | |
| 28. |
Flow in an open channel can be measured by |
| A. | a manometer |
| B. | orifice |
| C. | nozzle |
| D. | None of the above |
| E. | Any of the above |
| Answer» E. Any of the above | |
| 29. |
A hot wire anemometer is used to measure |
| A. | pressure of liquids |
| B. | very low pressure |
| C. | gas velocities |
| D. | None of the above |
| E. | Any of the above |
| Answer» D. None of the above | |
| 30. |
The temperature of freezing mercury is |
| A. | ?225?C |
| B. | ?39?C |
| C. | ?69?C |
| D. | 0?C |
| E. | ?169?C |
| Answer» C. ?69?C | |
| 31. |
The maximum allowable limit that a measurement may vary from the true value is called |
| A. | Expected error |
| B. | Range of error |
| C. | Permissible error |
| D. | Least error |
| E. | Safe error |
| Answer» D. Least error | |
| 32. |
A tellurometer works on the principle of |
| A. | X-rays |
| B. | Optics |
| C. | Reflection of light |
| D. | High frequency radio waves |
| E. | Propagation of modulated waves |
| Answer» E. Propagation of modulated waves | |
| 33. |
In a digital instrument "over ranging" means |
| A. | Parameter being measured is varying constantly |
| B. | All digits indicte reading of 8 |
| C. | Half digit is switched off |
| D. | Half digit is switched on |
| E. | Only three digits are switched on |
| Answer» E. Only three digits are switched on | |
| 34. |
The flow in open channel can be measured by |
| A. | Venturimeter |
| B. | Rotameter |
| C. | Pitot tube |
| D. | Orifice |
| E. | Turbine meter |
| Answer» D. Orifice | |
| 35. |
The salinometer measures |
| A. | Density of brine |
| B. | Specific gravity of molasses |
| C. | Sould level |
| D. | Temperature in cryogenic regions |
| E. | Intensity of illumination |
| Answer» B. Specific gravity of molasses | |
| 36. |
Which of the following torque transducer needs battery or rectified ac source for its operation? |
| A. | Strain gauge |
| B. | Differential transformer |
| C. | Variable permeability transducer |
| D. | Optical transducer |
| E. | All of the above |
| Answer» F. | |
| 37. |
A geodimeter is used for the measurement of |
| A. | area |
| B. | angles |
| C. | distance |
| D. | None of the above |
| E. | Any of the above |
| Answer» D. None of the above | |
| 38. |
A strobotron is |
| A. | A tachogenerator |
| B. | A two winding dc generator |
| C. | A hot cathode gaseous discharge tube |
| D. | A device for temperature measurement |
| E. | None of the above |
| Answer» D. A device for temperature measurement | |
| 39. |
The function of the reference electrode in a pH meter is to |
| A. | Measure average pH value |
| B. | Produce a constant voltage |
| C. | Provide temperature compensation |
| D. | Produce a constant current |
| E. | None of the above |
| Answer» C. Provide temperature compensation | |
| 40. |
Ionisation gauge is used to measure pressures |
| A. | Below 3 microns |
| B. | Above 3 microns |
| C. | Above 100 microns |
| D. | Between 100 and 200 microns |
| E. | Above 200 microns |
| Answer» B. Above 3 microns | |
| 41. |
Which of the following material has maximum temperature coefficient of resistance |
| A. | Nichrome V |
| B. | Isoelastic |
| C. | Manganin |
| D. | Monel |
| E. | Any of the above |
| Answer» E. Any of the above | |
| 42. |
Accelerometer is the transducer for |
| A. | Vibration |
| B. | Shock |
| C. | Absolute motion |
| D. | All of the above |
| E. | None of the above |
| Answer» E. None of the above | |
| 43. |
Synchronization in a CRO means |
| A. | holding a pattern on the screens without creep |
| B. | continuously monitoring the trace |
| C. | adjusting sweep frequency |
| D. | All of the above |
| E. | Any of the above |
| Answer» E. Any of the above | |
| 44. |
Decibels are basically measures of |
| A. | power gain |
| B. | voltage fain |
| C. | current gain |
| D. | None of the above |
| E. | Any of the above |
| Answer» B. voltage fain | |
| 45. |
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» C. Pitot tube | |
| 46. |
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» E. None of the above | |
| 47. |
Ceremets are |
| A. | Resistance elements |
| B. | Ganged condensers |
| C. | Variable capacitors |
| D. | Multi-turn potentiometers |
| E. | Defects in transducers |
| Answer» B. Ganged condensers | |
| 48. |
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» E. All of the above | |
| 49. |
The melting point of tungsten is around |
| A. | 2800?C |
| B. | 1256?C |
| C. | 3400?C |
| D. | 1156?C |
| E. | 4400?C |
| Answer» D. 1156?C | |
| 50. |
If a measuring tape is too long as compared to standard, the error will be known as |
| A. | Manufacturing error |
| B. | Natural error |
| C. | Superficial error |
| D. | Personal error |
| E. | Instrumental error |
| Answer» F. | |