40 TOP MEASUREMENT, CONVERSION and CONTROL Online Test – Questions and Answers 1. The output voltage of a typical thermocouple is less than 100 mV Thermocouples vary resistance, not voltage greater than 1 V None of the above 2. Temperature sensing can be achieved by the use of thermistors thermocouples RTDs all 3. The purpose of compensation for a thermocouple is to decrease temperature sensitivity to cancel unwanted voltage output of a thermocouple used for high-temperature circuits to increase voltage output 4. The silicon-controlled rectifier can be turned off by a negative gate pulse with the off switch by forced commutation when the breakover voltage is exceeded 5. What is the moving part of a linear variable differential transformer? Core Primary Diaphragm Secondary 6. The change in value of an analog signal during the conversion process produces what is called the Nyquist error resolution error quantization error sampling error 7. What is the zero-voltage switch used for? To reduce radiation of high frequencies during turn-on of a high current to a load To control low-voltage circuits For extremely low-voltage applications To provide power to a circuit when power is lost 8. Which of the following performance specifications applies to a sample-and-hold circuit? Feedback Aperture droop Aperture time Acquisition jitter 9. RTDs are typically connected with other fixed resistors and variable resistors and capacitors in a filter-type circuit in a pi configuration in a bridge configuration 10. The connections to a thermocouple can produce an unwanted thermocouple effect, which must be compensated for produce an extra desirable thermocouple effect must be protected, since high voltages are present produce an extra desirable thermocouple effect and must be protected, since high voltages are present Loading … Question 1 of 10
