Quiz based on troubleshooting Leave a Comment / By Sivaranjith / March 13, 2018 Welcome to your Quiz.This quiz is about Troubleshooting. it contains 20 questions 1. A continuity check should be made prior to hook-up of a field transmitter to the control room so that the technician: can assure that the transmitter is being hooked-up to the proper indicator/controller can make sure that the proper voltages are present can make sure that he continue hook-up on a particular transmitter knows that he may connect another transmitter to the loop circuit 2. Impulse lines are used with: Pressure meters magnetic flowmeters positive displacement meters. open charmel meters 3. What occurs if the temperature of the thermocouple measuring junction is lower than the reference junction? There is no emf output. The output voltage polarity is reversed The polarity stays the same but voltage increases. The emf remains the same when temperature changes 4. Which meter does not use an obstruction? head meter magnetic meter open channel meter turbine meter 5. What is a thermowell? protective tube type of manometer expandable bulb reservoir 6. When the percentage of flow through a valve equals the percentage of plug movement, a valve has: linear flow characteristic equal percentage flow characteristic quick opening flow characteristic curved flow characteristic 7. A ground loop on shielded cable can be avoided by: attaching a safety ground to the instrument casing grounding the shield at only one end of the circuit attaching a safety ground to the control panel grounding the shield at both ends of the cable 8. The body of a valve may contain packing material that prevents leakage: along the valve stem. between the seat and the disk between the bonnet and the body between the inlet and outlet ports of the valve 9. A 4-20 mA electronic transmitter has an input range of 50-330 degrees F. If the C output is 13.77 mA, what is the indicated temperature in degrees F? 173 221 266 302 10. A meter reading of 1 ohm between an ungrounded signal lead and the earth ground indicates a problem of: a lead having an unwanted connection to ground an open circuit from the lead to ground an open circuit from the lead to the casing none of the above 11. The dead band of an instrument is: the band that prevents the instrument from being tampered with by unau thorized persons the range of valves for which the instrument gives inaccurate readings the size of the instrument indicated by the divisions on the scale of the instrument the range that an input signal may be changed on reversal of direction without an observable change in the output 12. The Coriolis effect is associated with the: head meter mass flowmeter positive displacement meter turbine meter 13. Which of the following parts of a globe valve serves the same purpose as the disk in a butterfly valve? seat plug packing rings packing flange 14. The process of grinding the plug and seat of a valve is called: characterizing linearizing lapping calibrating 15. Which type of flowmeter measures flows by measuring volume directly? coriolis magnetic positive displacement differential pressure 16. If the range of a 3-15 psi pneumatic transmitter is 50-350 degrees F, what is the output signal value, in psi, at 198 degrees F? 5.7 7.2 8.9 12.6 17. Which type of flowmeter does a rotor mounted axially within a pipe between a set of bearings describe magnetic turbine water meter venturi tube 18. What kind of wires in a process control loop would most likely be shielded cables? power wires ground wires signal wires control wires 19. A device used to change an analog signal to a digital signal is most often called a: transducer signal conditioner transmitter converter 20. A breadboarding area is: a data routing circuit used to design or test electronic circuits a code-converting circuit a temporary binary storage area For more Knowledge please visit: Automationforum.in Automationforum.co Time's up
