McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Electrical Engineering .
Chapters
| 1. |
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» C. high insulation resistance | |
| 2. |
In AMR the resistance produced by scattering is_ _ _ _ __ when the magnetization direction is parallel to the current direction |
| A. | Zero |
| B. | Minimum |
| C. | Maximum |
| D. | infinite |
| Answer» C. Maximum | |
| 3. |
The below picture is an application of _ _ _ _ |
| A. | Radio beacon |
| B. | Load cell |
| C. | magnetoresistance |
| D. | MEMS sensor |
| Answer» B. Load cell | |
| 4. |
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» A. Nickel and copper | |
| 5. |
Proper bonding causes errors in strain gauges. |
| A. | True |
| B. | False |
| C. | none |
| D. | none |
| Answer» B. False | |
| 6. |
In Hall Effect sensor, the magnitude of the voltage generated depends on the _ _ _ _ _. |
| A. | Strength of the magnetic field |
| B. | Strength of the current |
| C. | Property of the conductor |
| D. | All the above |
| Answer» D. All the above | |
| 7. |
_ _ _ _ _ depends on the angle between the electric current and the magnetization direction |
| A. | Anisotropic Magnetoresistance |
| B. | Giant Magnetoresistance |
| C. | Tunnel Magnetoresistance |
| D. | All the above |
| Answer» A. Anisotropic Magnetoresistance | |
| 8. |
Load cells are used for measuring _______________ |
| A. | Large weights only |
| B. | Small weights only |
| C. | Weights moving in high speed |
| D. | Slowly moving weights |
| Answer» D. Slowly moving weights | |
| 9. |
Optical gyroscopes - operate on the principle of the _ _ _ _ _ |
| A. | Mutual inductance |
| B. | Lenz law |
| C. | Faradays law |
| D. | Sagnac Effect |
| Answer» D. Sagnac Effect | |
| 10. |
The change in resistance in strain gauge can be calculated by _____________ |
| A. | Kelvin bridge |
| B. | Maxwell bridge |
| C. | Wheatstone bridge |
| D. | Wien bridge |
| Answer» C. Wheatstone bridge | |
| 11. |
Bonded type strain gauge depends upon____ |
| A. | Filament construction |
| B. | Material of the filament wire |
| C. | Cement used to bond the filament to the carrier |
| D. | All the above |
| Answer» D. All the above | |
| 12. |
In AMR the 45º alignment is commonly achieved by patterning _ _ _ _ _of highly conductive metal onto the more resistive AMR material |
| A. | Perpendicular stripes |
| B. | Parallel stripes |
| C. | Diagonal stripes |
| D. | Rectangle strips |
| Answer» C. Diagonal stripes | |
| 13. |
Load cells are primary transducers. |
| A. | True |
| B. | False |
| C. | none |
| D. | none |
| Answer» A. True | |
| 14. |
In Hall Effect, the electric field applied is perpendicular to both current and magnetic field? |
| A. | True |
| B. | False |
| C. | none |
| D. | none |
| Answer» A. True | |
| 15. |
Magneto resistive sensors based on __ _ _ _ _ effect |
| A. | Thomson |
| B. | Faradays |
| C. | Lenz |
| D. | Tesla |
| Answer» A. Thomson | |
| 16. |
Axis of rotation of wheel in gyroscope is called ____________ |
| A. | Spin axis |
| B. | Vertical axis |
| C. | Horizontal axis |
| D. | Angular axis |
| Answer» A. Spin axis | |
| 17. |
_ _ _ _ _ _ are widely used in experimental stress analysis and diagnosis on machines and failure analysis. |
| A. | Load cell |
| B. | Strain gauge |
| C. | Magentoresistance |
| D. | Gyroscope |
| Answer» B. Strain gauge | |
| 18. |
In AMR the maximum sensitivity and linearity is achieved when the magnetization is at _ _ _ with respect to the current. |
| A. | 0 degree |
| B. | 15 degree |
| C. | 30 degree |
| D. | 45degree |
| Answer» D. 45degree | |
| 19. |
Strain gauge foils are made up of _________ |
| A. | Copper |
| B. | Nickel |
| C. | Constantan alloy |
| D. | Platinum |
| Answer» C. Constantan alloy | |
| 20. |
A _ _ _ _ is a type of force gauge. |
| A. | Inclinometer |
| B. | Load cell |
| C. | LVDT |
| D. | Resolver |
| Answer» B. Load cell | |
| 21. |
When the magnetic layers are aligned in the same direction, electrons originating in one layer may pass relatively _ _ _ _ _ through the other layers |
| A. | Freely |
| B. | Blocked |
| C. | rest on |
| D. | All the above |
| Answer» A. Freely | |
| 22. |
Gimbals are used for _____________ |
| A. | Improving rotational speed |
| B. | Supporting gyro wheel |
| C. | As damping agent |
| D. | None of the mentioned |
| Answer» B. Supporting gyro wheel | |
| 23. |
Gauge factor is given by which of the following relation? |
| A. | S = ΔR/R/Δl |
| B. | S = ΔR/Δl/l |
| C. | S = R/Δl/l |
| D. | S = ΔR/R/Δl/l |
| Answer» D. S = ΔR/R/Δl/l | |
| 24. |
A _ _ _ _ _ is an instrument used for navigation and orientation that shows direction relative to the geographic cardinal directions |
| A. | Compass |
| B. | Gyroscope |
| C. | Accelerometer |
| D. | Inclinometer |
| Answer» A. Compass | |
| 25. |
________ load cells are considered in remote locations, as they do not require a power supply. |
| A. | Hydraulic |
| B. | Pneumatic |
| C. | Capacitance |
| D. | Strain gauge |
| Answer» A. Hydraulic | |
| 26. |
Wheel speed sensors is the application of _ _ _ _ _ _ _ |
| A. | Load cell |
| B. | Strain gauge |
| C. | Magentoresistance |
| D. | Gyroscope |
| Answer» C. Magentoresistance | |
| 27. |
_________ Load cell are sometimes used where intrinsic safety and hygiene are desired. |
| A. | Hydraulic |
| B. | Pneumatic |
| C. | Capacitance |
| D. | Strain gauge |
| Answer» B. Pneumatic | |
| 28. |
In Hall Effect sensor, an electric potential is in third direction which is ________ to the other two directions. |
| A. | Parallel |
| B. | Mutually Perpendicular |
| C. | 180 degree phase shift |
| D. | None of the above |
| Answer» B. Mutually Perpendicular | |
| 29. |
A _ _ _ _ _ _, is a measurement device that uses gravity to measure the inclination of an object. |
| A. | Inclinometer |
| B. | Strain gauge |
| C. | Magentoresistance |
| D. | Gyroscope |
| Answer» A. Inclinometer | |
| 30. |
In AMR the resistance produced by scattering is_ _ _ _ __ when the magnetization direction is perpendicular to the current direction |
| A. | Zero |
| B. | Minimum |
| C. | Maximum |
| D. | infinite |
| Answer» B. Minimum | |
| 31. |
The _ _ __ in an element is a ratio of change in length in the direction of applied load to the original length of an element. |
| A. | Stress |
| B. | Strain |
| C. | Poisson ratio |
| D. | Young Modulus |
| Answer» B. Strain | |
| 32. |
Today, almost all electronic weighing scales use ________ for the measurement of weight |
| A. | Load cell |
| B. | Strain gauge |
| C. | Magentoresistance |
| D. | Gyroscope |
| Answer» A. Load cell | |
| 33. |
The Hall Effect sensor is not capable of measuring a current flow at a distance greater than _ _ _cm |
| A. | 2 |
| B. | 4 |
| C. | 8 |
| D. | 10 |
| Answer» D. 10 | |
| 34. |
To obtain the GMR effect, the spacer layers must be ____________ |
| A. | Thick |
| B. | Thin |
| C. | Both a) and b) |
| D. | None of the above |
| Answer» B. Thin | |
| 35. |
__________ load cells dominate the weighing industry. |
| A. | Hydraulic |
| B. | Pneumatic |
| C. | Capacitance |
| D. | Strain gauge |
| Answer» D. Strain gauge | |
| 36. |
In Hall Effect sensor, an electric current is _______ to the direction of the magnetic flux. |
| A. | Parallel |
| B. | Perpendicular |
| C. | 180 degree phase shift |
| D. | None of the above |
| Answer» B. Perpendicular | |
| 37. |
______ Gyroscope was applied extensively in aircraft navigation. |
| A. | Mechanical |
| B. | MEMS |
| C. | Ring laser |
| D. | Fiber optic gyroscope |
| Answer» C. Ring laser | |
| 38. |
When the magnetic layers are aligned in the opposing direction, then electrons originating in one layer are __________ from the adjacent layer |
| A. | Freely |
| B. | Blocked |
| C. | rest on |
| D. | All the above |
| Answer» B. Blocked | |
| 39. |
The Hall Effect is possessed by ________ |
| A. | Metals |
| B. | Insulator |
| C. | Semiconductor |
| D. | both metals and semiconductor |
| Answer» D. both metals and semiconductor | |
| 40. |
The operating principle of all mechanical gyroscopes is based on the ________ |
| A. | Ohm law |
| B. | conservation of angular momentum |
| C. | Faradays law |
| D. | Tesla principle |
| Answer» B. conservation of angular momentum | |
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