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Name: ________________________ Class: ___________________ Date: __________ ID: A Please print the bubble sheet and use that to answer ALL questions. For True/False section A=True, B=False. Fill in the “Student ID Number” with the last four digits of your UUID (last digit to the right). TECH3821 - Test #2 - Fall 2016 True/False Indicate whether the statement is true (A) or false (B). ____ 1. pH is one of the easiest measurements to make electronically. ____ 2. Pressure is one of the most prolific measurement transmitters due to their many uses. ____ 3. To measure very small changes in a transmitter, a weir is used. ____ 4. Lockout / Tagout is used to prevent injuries when equipment is being repaired ____ 5. Vibration is used to predict impending failures of gear boxes, motors and other spinning equipment. Multiple Choice Select the BEST ANSWER to the following. ____ ____ ____ 6. A Transducer a. converts a voltage into a binary value that c. can be used by a computer b. is a device that converts voltage to d. current 7. A bi-metallic strip a. is used in thermostats b. measures pressure c. d. is used for over current protection a and C 8. A Thermistor is a. a linear temperature measuring device c. a device that changes resistance proportionally or inversely proportionally to temperature is a solid state device that measures temperature b. ____ is a device that converts a physical quantity into an electrical signal is another name for a transformer a device that changes voltage proportionally to the temperature of the device 9. A Thermocouple is a. a silicone based temperature measuring device b. a juction of two similar metals that changes it resistance with temperature ____ 10. An old style thermometer is an example of a. a bi-metalic strip b. dial thermometer d. c. d. a device that creates motion with a temperature change a juction of two dissimilar metals that produces a small voltage when exposed to a temperature change c. d. filled-bulb thermistor 1 Name: ________________________ ____ 11. A manometer is a a. simple temperature measuring device b. a simple pressure measuring device ID: A c. d. a simple level measuring device a test of one’s manhood ____ 12. Which of the following does NOT convert pressure into a force a. bellows c. diaphragm b. bi-metallic strip d. bourdon tube ____ 13. To convert the deformation of a diaphragm into an electrical signal a ___________ is often used a. thermistor c. silicone device b. switch d. strain gauge ____ 14. A stilling well is a. used to get an accurate measurement of level in a tank that is being stirred b. measures flow ____ 15. Power Factor a. is a way of measuring power (watts) b. an indication of inductive or capacitive lead/lag ____ 16. F.O. stands for a. Fixed o-ring b. Flow over c. measures inductance d. a another name for a weir c. d. a current measurement method a way to determine a motors efficiency c. d. Fail open Fried output ____ 17. The following is an example of ________________ a. b. current transformer Slip ring c. d. 2 stepper motor DC Commutator Name: ________________________ ID: A ____ 18. The following is an example of ________________ a. b. current transformer Slip ring c. d. stepper motorr DC Commutator ____ 19. The following is an example of ________________ a. b. current transformer Slip ring c. d. 3 stepper motor DC Commutator Name: ________________________ ID: A ____ 20. In the diagram, what does is “TIC” a. b. the temperature measuring device the actuator c. d. the controller none of the above c. d. the controller none of the above ____ 21. In the diagram, what does is “TT” a. b. the temperature measuring device the actuator 4 Name: ________________________ ID: A ____ 22. In the diagram, what does is “TV” a. b. the temperature measuring device the actuator c. d. the controller none of the above b. a closed loop control system c. d. single acting cylinder relay ____ 23. The following Diagram shows a. an open loop control system ____ 24. Define the symbol below: a. b. double acting cylinder solenoid 5 Name: ________________________ ID: A ____ 25. Define the symbol below: a. b. double acting cylinder solenoid c. d. single acting cylinder relay c. single solenoid, spring return, 5/2 directional control valve manual, spring return, 5/2 directional control valve ____ 26. Define the symbol below: a. b. single solenoid, spring return, nomally closed, 3/2 directional control valve manual, spring return, nomally closed, 3/2 directional control valve d. ____ 27. Given the diagrams below: What will happen when PB1 is pressed and held down? a. The cylindar will extend c. b. the cylindar will extend, hit the limit switch, then retract d. 6 the cylindar will extend, hit the limit switch, then start to retract, then immediatly extend again. It will not work Name: ________________________ ID: A Multiple Response Identify one or more choices that best complete the statement or answer the question. ____ 28. A pressure transmitter can be used to do the following (mark ALL that apply) a. measure flow d. measure level b. measure pressure e. check for a clogged filter c. measure temperature f. measure a vacuum ____ 29. Measuring Level can be accomplished by using the following transmitters (select ALL that apply) a. floats e. pressure transmitters b. temperature transmitters f. bubble tube c. sonar g. radar d. laser h. load cells ____ 30. The following can be used to measure flow (mark ALL that apply) a. weir e. vortices b. bi-metallic strip f. differential pressure c. variable area float g. thermistor d. paddlewheel h. magnetic flux ____ 31. Conductivity can be measured using (check all that apply) a. induction c. thermistors b. electrodes d. resistors ____ 32. A quadrature encoder can be used to determine (select all that apply) a. speed c. direction b. drive current d. relative movement ____ 33. Position can be determined by (select ALL that apply) a. absolute encoder c. slide wire b. potentiometer d. LVDT ____ 34. The following are considered actuators (mark ALL that apply) a. current transformer d. motor b. valve e. rotory flow meter c. pneumatic cylendar f. solinoid 7