MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 35 Mcqs, each offering curated multiple-choice questions to sharpen your Electronics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The voltage produced by a thermocouple is called the _________. |
| A. | hot junction voltage |
| B. | cold junction voltage |
| C. | Seebeck voltage |
| D. | Hooke voltage |
| Answer» D. Hooke voltage | |
| 2. |
The three types of relative pressure measurement are ________. |
| A. | exact, reflective, and referenced |
| B. | absolute, exact, and differential |
| C. | absolute, gauge, and reflective |
| D. | absolute, gauge, and differential |
| Answer» E. | |
| 3. |
The two most common types of analog-to-digital converters discussed in this chapter were the ______. |
| A. | linear converter and the analog converter |
| B. | linear converter and the successive approximation converter |
| C. | flash converter and the analog converter |
| D. | flash converter and the successive approximation converter |
| Answer» E. | |
| 4. |
Pressure transducers are devices that exhibit a change in resistance inversely proportional to a change in pressure. |
| A. | 1 |
| B. | |
| Answer» C. | |
| 5. |
The change in value of the analog signal during the sampling process produces what is called the quantization error. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 6. |
A basic sample-and-hold circuit consists of an analog switch, a capacitor, and an instrumentation amplifier. |
| A. | 1 |
| B. | |
| Answer» C. | |
| 7. |
The ______ is composed of a transformer with a movable core, a primary, and two secondaries. |
| A. | LVDT |
| B. | strain gauge |
| C. | accelerometer |
| D. | transformer displacement sensor |
| Answer» B. strain gauge | |
| 8. |
The ________ are two types of acceleration transducers. |
| A. | LVDT and the piezoelectric |
| B. | magnetic and the piezoelectric |
| C. | RTD and the magnetic |
| D. | LVDT and the RTD |
| Answer» B. magnetic and the piezoelectric | |
| 9. |
Noncontacting displacement transducers include optical and capacitive transducers. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 10. |
Thermocouple connections must be taken into account to ensure a high degree of accuracy. |
| A. | 1 |
| B. | |
| C. | 1 |
| D. | |
| Answer» B. | |
| 11. |
Holding current for an SCR is best described as |
| A. | the minimum current required for turn-off |
| B. | the current required before an SCR will turn on |
| C. | the amount of current required to maintain conduction |
| D. | the gate current required to maintain conduction |
| Answer» D. the gate current required to maintain conduction | |
| 12. |
The number of bits in a digital word determines the number of digital combinations that will be represented. The number of combinations can be calculated by ________. |
| A. | raising 2 to the number of bits in the analog word |
| B. | raising 2 to the number of bits in the digital word |
| C. | multiplying 2 by the number of bits in the analog word |
| D. | determining the range of the analog word |
| Answer» C. multiplying 2 by the number of bits in the analog word | |
| 13. |
The triac provides better dc power control than the SCR. |
| A. | 1 |
| B. | |
| Answer» C. | |
| 14. |
The change in value of an analog signal during the conversion process produces what is called the |
| A. | quantization error |
| B. | resolution error |
| C. | Nyquist error |
| D. | sampling error |
| Answer» B. resolution error | |
| 15. |
RTDs, strain gauges, and pressure transducers are _____ devices. |
| A. | resistive |
| B. | inductive |
| C. | capacitive |
| D. | solid-state |
| Answer» B. inductive | |
| 16. |
The purpose of compensation for a thermocouple is |
| A. | to decrease temperature sensitivity |
| B. | to increase voltage output |
| C. | to cancel unwanted voltage output of a thermocouple |
| D. | used for high-temperature circuits |
| Answer» D. used for high-temperature circuits | |
| 17. |
Temperature sensing can be achieved by the use of |
| A. | thermocouples |
| B. | RTDs |
| C. | thermistors |
| D. | All of the above |
| Answer» E. | |
| 18. |
A triac is different from an SCR because ________. |
| A. | it can handle large current flows |
| B. | it can handle large voltages |
| C. | the gate signal can turn off the current flow |
| D. | it allows current flow in both directions |
| Answer» E. | |
| 19. |
A strain gauge uses the principle of capacitance for its operation. |
| A. | 1 |
| B. | |
| Answer» C. | |
| 20. |
Which of the following performance specifications applies to a sample-and-hold circuit? |
| A. | Aperture time |
| B. | Aperture droop |
| C. | Feedback |
| D. | Acquisition jitter |
| Answer» B. Aperture droop | |
| 21. |
A sample-and-hold circuit consists of _________. |
| A. | an op-amp, an analog switch, and an inductor |
| B. | an op-amp, an analog switch, and a capacitor |
| C. | two op-amps, an analog switch, and a variable resistor |
| D. | two op-amps, an analog switch, and a capacitor |
| Answer» E. | |
| 22. |
The SCR is ideal for ac applications. |
| A. | 1 |
| B. | |
| Answer» C. | |
| 23. |
What is the moving part of a linear variable differential transformer? |
| A. | Primary |
| B. | Secondary |
| C. | Diaphragm |
| D. | Core |
| Answer» E. | |
| 24. |
A thermistor's temperature characteristic is essentially _________. |
| A. | linear |
| B. | logarithmic |
| C. | nonlinear |
| D. | geometric |
| Answer» C. nonlinear | |
| 25. |
Displacement, velocity, and acceleration can all be measured by using specific motion transducers. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 26. |
A(n) _____ can be rapidly switched on and off remotely by another controlling circuit. |
| A. | triac |
| B. | diac |
| C. | RTD |
| D. | zero-voltage switch |
| Answer» B. diac | |
| 27. |
The silicon-controlled rectifier can be turned off |
| A. | by a negative gate pulse |
| B. | by forced commutation |
| C. | with the off switch |
| D. | when the breakover voltage is exceeded |
| Answer» C. with the off switch | |
| 28. |
All triacs operate in __________. |
| A. | quadrant 1 and quadrant 2 |
| B. | quadrant 1 and quadrant 3 |
| C. | quadrant 2 and quadrant 4 |
| D. | quadrant 3 and quadrant 4 |
| Answer» C. quadrant 2 and quadrant 4 | |
| 29. |
The connections to a thermocouple |
| A. | can produce an unwanted thermocouple effect, which must be compensated for |
| B. | produce an extra desirable thermocouple effect |
| C. | must be protected, since high voltages are present |
| D. | produce an extra desirable thermocouple effect and must be protected, since high voltages are present |
| Answer» B. produce an extra desirable thermocouple effect | |
| 30. |
The output voltage of a typical thermocouple is |
| A. | less than 100 mV |
| B. | greater than 1 V |
| C. | Thermocouples vary resistance, not voltage. |
| D. | None of the above |
| Answer» B. greater than 1 V | |
| 31. |
The resistive change of a strain gauge |
| A. | is based on the weight placed upon it, but can be many thousands of ohms |
| B. | is usually no more than 100 |
| C. | is based on the gauge factor, but is typically less than an ohm |
| D. | has a positive temperature coefficient |
| Answer» D. has a positive temperature coefficient | |
| 32. |
RTDs are typically connected with other fixed resistors |
| A. | in a pi configuration |
| B. | in a bridge configuration |
| C. | and variable resistors |
| D. | and capacitors in a filter-type circuit |
| Answer» C. and variable resistors | |
| 33. |
A resistance temperature detector produces a voltage for a given change in temperature. |
| A. | 1 |
| B. | |
| C. | 1 |
| D. | |
| Answer» C. 1 | |
| 34. |
What is the zero-voltage switch used for? |
| A. | To reduce radiation of high frequencies during turn-on of a high current to a load |
| B. | To control low-voltage circuits |
| C. | To provide power to a circuit when power is lost |
| D. | For extremely low-voltage applications |
| Answer» B. To control low-voltage circuits | |
| 35. |
What device is similar to an RTD but has a negative temperature coefficient? |
| A. | Strain gauge |
| B. | Thermistor |
| C. | Negative-type RTD |
| D. | Thermocouple |
| Answer» C. Negative-type RTD | |