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IP Exam > Section 2 PROCESS MEASURING AND INDICATING DEVICES > Flashcards

Section 2 PROCESS MEASURING AND INDICATING DEVICES Flashcards

1
Q
  1. When are metal grounding rings and grounding straps installed in an electromagnetic flowmeter?
A

A. When the flowtube is made of metal.
B. When the pipeline is non-conductive.
C. When the coils are connected in series.
D. When the flowtube is installed backwards.

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2
Q
  1. What is a consideration when installing the sensor of an ultrasonic level transmitter on a liquid level application?
A

A. Material of the tank enclosure.
B. Expansion of the liquid due to temperature.
C. Distance to the liquid at the maximum level.
D. Specific gravity of the liquid.

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3
Q
  1. What is the procedure to accurately calibrate a turbine flowmeter?
A

A. Determines pulses per unit volume, simulate flow with a signal generator, then verify transmitter output.
B. Determine desired rpm of turbine, apply 20 mA DC current, then verify transmitter output.
C. Determine the desired angle of turbine blades, measure the actual angle of turbine blades, then verify tolerance.
D. Determine desired excitation voltage, simulate flow with a voltage generator, then verify transmitter output.

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4
Q
  1. What maintenance is done first when an insulated capacitance probe transmitter indicates 60% and the actual level is 50%?
A

A. Clean the probe.
B. Zero the transmitter.
C. Install a bare probe.
D. Re-range the transmitter.

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5
Q
  1. A 4-20 mA DP cell has been calibrated for a range of 0 to 100 in. H₂O. The DP range corresponds to a flow range of 0 to 5,000 L/min. The cell output is 12 mA. What is the actual flow?
A

A. 1,250 L/min.
B. 1,464 L/min.
C. 2,500 L/min
D. 3,535 L/min

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6
Q
  1. Refer to Figure 25. Both legs are filled with a sealing fluid of 1.1 SG. The transmitter is removed and calibrated on the test bench. What is the simulated input on the low side of the transmitter for a current output of 12 mA?
A

A. -75 in. H₂O
B. +25 in. H₂O
C. +75 in. H₂O
D. +85 in. H₂O

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7
Q
  1. Process temperature is 90°C but when measured with a two-wire RTD transmitter, it has a full scale reading of 150°C. What is the cause?
A

A. RTD is open.
B. RTD is shorted.
C. RTD connections are reversed.
D. Transmitter power supply is inadequate.

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8
Q
  1. During routine maintenance, the magnetic flowmeter readings are found to be low and slow to respond. What is done to correct the problem?
A

A. Recalibrate the flow transmitter.
B. Increase the process flow through the flow tube.
C. Decrease the flow transmitter range to increase sensitivity.
D. Clean the sensing electrodes on the flow tube.

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9
Q
  1. A capacitance level transmitter is reading incorrectly. What is the cause?
A

A. A change in the specific gravity of the liquid.
B. A change in dielectric constant of the liquid.
C. Corrosive liquid in the vessel.
D. Viscous liquid in the vessel.

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10
Q
  1. What is done to eliminate erratic readings when using a grounded tip thermocouple?
A

A. Install a thermowell.
B. Install an isolated receiving device.
C. Ground the shield at the thermocouple.
D. Disconnect the shield at the receiving instrument.

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11
Q
  1. The diameter of a pipe was increased to improve plant production. What is done first to achieve an accurate flow measurement?
A

A. Replace the transmitter.
B. Replace the orifice plate.
C. Replace the orifice plate and the transmitter.
D. Recalibrate the transmitter.

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12
Q
  1. A pressure transmitter with a high pressure shutdown interlock is to be removed from service. What is done after operations personnel are notified?
A

A. Remove the fuse, bypass the shutdown, then remove the transmitter.
B. Remove the fuse, force the valve open, isolate, bleed, then remove the transmitter.
C. Bypass the shutdown, force the valve open, then remove the transmitter.
D. Bypass the shutdown, remove the fuse, isolate, bleed, then remove the transmitter.

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13
Q
  1. A chart recorder reads correctly at zero and at 100%, but reads 10% high at mid-range. Which adjustment is made to repair the problem?
A

A. Span adjustment in the direction of the error.
B. Zero adjustment in the opposite direction of the error.
C. Span adjustment in the opposite direction of the error.
D. Linearity adjustment in the direction of the error.

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14
Q
  1. An intrinsic safety barrier was recently added to a smart pressure transmitter process loop. The transmitter will not transmit current above 19 mA. What is done first?
A

A. Check power supply and check loop impedance.
B. Check power supply and replace sensing element.
C. Verify upper range value (URV) and replace transmitter.
D. Verify lower range value (LRV) and replace sensing element.

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15
Q
  1. What is done to install a proximity switch on a block valve to indicate closed position?
A

A. Ensure valve is 50% open, set open proximity switch, then stroke valve several times to test.
B. Ensure valve is 50% open, set close proximity switch, then stroke valve several times to test.
C. Ensure valve is closed, set close proximity switch, then stroke valve several times to test.
D. Ensure valve is open, set open proximity switch, then stroke valve several times to test.

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16
Q
  1. What is the procedure to install a fail-safe zero speed switch on a conveyor system to detect a broken conveyor belt?
A

A. Install on the drive end pulley, use normally-open contacts.
B. Install on the drive end pulley, use normally-closed contacts.
C. Install on the non-drive end pulley, use normally-open contacts.
D. Install on the non-drive end pulley, use normally-closed contacts.

17
Q
  1. A 4-20 mA transmitter is calibrated to accept 0-1,000 pulses/sec, and has an input frequency of 875 Hz. What is the output?
A

A. 14.0 mA
B. 16.0 mA
C. 17.5 mA
D. 18.0 mA

18
Q
  1. An RF proximity detector is designed to detect steel. During maintenance, it is discovered that the target material has been changed to aluminum. What must be done to maintain accuracy?
A

A. Regap the probe.
B. Increase the supply voltage.
C. Recalibrate the amplifier.
D. Change the type of proximity probe.

19
Q
  1. What is the procedure for repairing a pulse generator tachometer?
A

A. Set probe gap, configure counter, then verify speed with strobe light.
B. Set probe gap, configure counter, then verify speed with signal generator.
C. Verify correct tooth count, set probe gap, then verify speed with signal generator.
D. Verify correct tooth count, set probe gap, then verify speed with strobe light.

20
Q
  1. Refer to Figure 63. (Tank supports not shown.) Where is the tension-type load cell installed?
A

A. A
B. B
C. C
D. D

21
Q
  1. Given the following information for a newly installed bubbler application:
A
  • Output range: 3-15 psig
  • Density range: 0.6-1.3 SG
  • Output pressure: 6 psig
What is the density?
A.	0.18 SG
B.	0.70 SG
C.	0.78 SG
D.	1.30 SG
22
Q
  1. What is done to the Geiger counter before using it to measure a source for radiation leakage?
A

A. Set radiation span.
B. Set range and emissivity.
C. Calibrate for zero and span.
D. Test operation with test source.

23
Q
  1. What causes the readings of a Coriolis mass meter to become progressively higher?
A

A. Scale build-up in tube.
B. Plugged tube.
C. Leaking connection.
D. Gas flashing.

24
Q
  1. What is done when a displacer used for density-type measuring systems is replaced?
A

A. Fully immerse the displacer in the solution.
B. Immerse 50% of the displacer in the solution.
C. Float the displacer on the top of the solution.
D. Immerse 25% of the displacer in the solution.

25
Q
  1. In which sequence are the components installed for a liquid chromatograph?
A

A. Sample valve, regulator, filter, then analyzer.
B. Sample valve, analyzer, regulator, then filter.
C. Filter, sample valve, analyzer, then regulator.
D. Filter, analyzer, sample valve, then regulator.

26
Q
  1. Which component must be cleaned before calibrating the turbidity analyzer?
A

A. Optics.
B. Photocell.
C. Window.
D. Light source.

27
Q
  1. Which method is used to calibrate a toroidal conductivity analyzer?
A

A. With probe disconnected, connect a decade resistance box across the inputs terminals, then dial in desired resistance.
B. With probe connected, put a decade resistance box parallel across the input terminals, then dial in desired resistance.
C. With probe connected, loop a wire through the toroid, attach the decade resistance box, then dial in desired resistance.
D. With probe disconnected, loop a wire through the toroid, attach the decade resistance box, then dial in desired resistance.

28
Q
  1. In a stack emission vacuum sampling system, how is a leak detected.
A

A. By applying foam and watching for foam growth.
B. By applying foam and watching for foam collapse.
C. By applying a soapy solution and watching for bubbles.
D. By applying ammonia and watching for smoke collapse.

29
Q
  1. Refer to Figure 17. Given the nitrous oxide concentration readings at the traverse points. What is the representative reading?
A

A. 63 ppm
B. 65 ppm
C. 83 ppm
D. 85 ppm

30
Q
  1. A detector requires replacement in a process gas analyzer. Where are the calibration parameters found?
A

A. P&ID.
B. Service manual.
C. Previous tag.
D. Instrument data sheet.

31
Q
  1. Refer to Figure 36. What is the procedure for replacing the flowmeter?
A

A. Close 1, close 4, replace 2, open 4, then adjust 1.
B. Close 4, close 1, replace 2, open 4, then adjust 1.
C. Close 1, close 4, replace 2, open 1, then adjust 4.
D. Close 4, close 1, replace 2, open 1, then adjust 4.

32
Q
  1. What is added to a flow computer, with an existing basic gas flow control loop, to display correct volumetric flow?
A

A. A pressure transmitter and a viscosity transmitter into the process line.
B. A temperature transmitter and a viscosity transmitter into the process line.
C. A pressure transmitter and a temperature transmitter into the process line.
D. A pressure transmitter and a velocity transmitter into the process line.

33
Q
  1. What is done during a scheduled maintenance of a flow computer system?
A

A. Verify all sensing elements.
B. Verify all process transmitters.
C. Update program to compensate for display drift.
D. Update program to compensate for display offset.

34
Q
  1. During a bench test of a flow computer set up to display totalized flow, the flow input is set for 50%, then suddenly decreased to 10%. What will the computer display indicate?
A

A. Display will initially show 50%, then gradually drop to 10% after the bump is made.
B. Display will initially show 50%, then suddenly drop to 10% after the bump is made.
C. Display will initially increase at a constant rate, then continue to increase at a reduced constant rate after the bump is made.
D. Display will initially increase at a constant rate, suddenly drop, then continue to increase at a reduced constant rate after the bump is made.

35
Q
  1. What is done when making changes to a flow computer program or algorithm?
A

A. Download new configuration, store new configuration as a backup file, upload new algorithm, then verify operation and ensure documentation meets regulatory requirements.
B. Download current configuration, store current configuration as a backup file, upload new algorithm, then verify operation and ensure documentation meets regulatory requirements.
C. Verify current configuration, upload new algorithm, then verify operation and ensure documentation meets regulatory requirements.
D. Download current configuration, store current configuration as a backup file, upload new algorithm, then zero totalizer and ensure documentation meets regulatory requirements.

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