SECTION 8 – TEMPERATURE MEASUREMENT

SECTION คำชี้แจง
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1. 8.05 How does calibration of a portable electronic thermometer differ from a field check?
    a. It is done by the responsible manager
    b. It is performed by a certified third party auditor
    c. It is verified in controlled conditions against a standard thermometer traceable to national standards
    d. There is no difference between the two
2. 8.40 When first received from the manufacturer or equipment supplier, what should happen to a new liquid-in-glass tank thermometer?
    a. It can be used immediately because the manufacturer calibrates the thermometer before it is shipped
    b. It must be checked to see that the liquid column is intact, then it may be used since the manufacturer will have calibrated the thermometer.
    c. It must be checked to see that the glass stem is not cracked or broken, then it may be used since the manufacturer will have calibrated the thermometer
    d. It must be compared against a thermometer certified by a National Standard body or an equivalent thermometer of traceable accuracy.
3. 8.53 What is the purpose of keeping the probe of a portable electronic thermometer (PET) in motion?
    a. To ensure the unit is calibrated
    b. To stir the product
    c. To minimize temperature stabilization time
    d. To prevent the probe becoming caught up in the tank ladder
4. 8.27 On a portable electronic thermometer, at what temperature should the field check be performed ?
    a. 0°C [32°F]
    b. 100°C [212°F]
    c. Ambient temperature
    d. Expected cargo temperature
5. 8.26 If a tank has an innage of 2,8m [9 11 ] what is the minimum number of temperatures which should be taken?
    a. One
    b. Two
    c. Three
    d. None
6. 8.13 Upright cylindrical storage tanks have calibration tables based on a specific tank shell temperature. If the observed tank shell temperature differs from the calibration table tank temperature will the volumes extracted from the calibration table will need to be corrected for this temperature difference?
    a. Yes
    b. No
    c.
    d.
7. 8.18 If only one temperature is required where should this temperature be taken from?
    a. The middle of the upper third
    b. The middle of the liquid level
    c. The middle of the lower third.
    d. Use a side readout thermometer
8. 8.04 Why do portable electronic thermometers have low-voltage indicators?
    a. So that it will not fail half way through the inspection
    b. The unit could give false readings if the battery is low
    c. If the voltage drops, the night-light will not work
    d. Most portable electronic thermometers do not have an indicator
9. 8.03 Is a portable electronic thermometer required to have a low voltage indicator?
    a. Yes
    b. No
    c.
    d.
10. 8.47 When taking temperatures, in motion means to move the temperature measurement device approximately 60cm [2 feet] above and 60cm [2 feet] below the desired measurement location?
    a. True
    b. False
    c.
    d.
11. 8.08 To what precision should temperatures obtained using portable electronic thermometers be read and recorded?
    a. To the nearest 0.1 °F or °C
    b. To the nearest 0.5 °F or °C
    c. To the nearest 1.0 °F or °C
    d. To the nearest 1.5 °F or °C
12. 8.12 If a portable electronic thermometer has a range of 0 - 95 °C [32-200°F], what is the required resolution?
    a. ± 1°C [ 2°F]
    b. ± 0.2°C [ 0.4°F]
    c. ± 0.1°C [ 0.2°F]
    d. Answers a., b. and c. are all wrong
13. 8.23 Liquid-in-glass thermometers are suitable for use in obtaining cargo product temperatures in marine vessels required to operate with closed or restricted systems?
    a. True
    b. False
    c.
    d.
14. 8.37 Which API MPMS Chapter covers temperature determination?
    a. Chapter 3
    b. Chapter 7
    c. Chapter 8
    d. Chapter 17
15. 8.36 A liquid-in-glass thermometer with a range between 60°F and 180°F and must be accurate to within?
    a. ± 1.0 °F
    b. ± 0.5 °F
    c. ± 0.1 °F
    d. ± 0.25 °F
16. 8.22 According to common industry practice how should the working spot check (field check) of a portable electronic thermometer be performed?
    a. Daily comparison to another portable electronic thermometer
    b. By comparing it to a liquid-in-glass thermometer, before each use or once per day
    c. By checking the unit weekly, for accuracy
    d. Calibrate against a thermometer (traceable to national standards) at prescribed intervals
17. 8.01 API MPMS Chapter 7/ISO 4268 pertains to what type of thermometers?
    a. Mercury-in-glass
    b. Alcohol-in-glass
    c. Portable electronic thermometers
    d. Answers a., b. and c. are all correct
18. 8.15 What information must be recorded when taking a temperature of a cargo using an in-line probe ?
    a. The last calibration date
    b. The serial number of the unit being used
    c. The last two times the probe was checked for accuracy
    d. Answers a., b. and c. are all wrong
19. 8.43 What does the term temperature stratification mean?
    a. That there are differences in temperature at different distances from the tank wall [tank shell]
    b. That there are differences in temperature at different levels in a tank
    c. That the temperature difference measured at any two levels in a tank exceeds 2 °C [5°F]
    d. Answers a. and b. are correct
20. 8.32 When taking temperatures for ROB, OBQ or slops containing oil and water it is important ____
    a. That the probe doesn t touch the steam coils
    b. That the tank is corrected for list / trim
    c. That the probe is placed at the mid-point of the oil or the oily layer
    d. That only a middle temperature is taken for slops
21. 8.36 A liquid-in-glass thermometer with a range between 60°F and 180°F and must be accurate to within?
    a. ± 1.0 °F
    b. ± 0.5 °F
    c. ± 0.1 °F
    d. ± 0.25 °F
22. 8.48 What is the recommended immersion time, for a liquid-in-glass thermometer in a cup-case assembly, in motion, in a product with density of 950 kg/m3 [API gravity 17.4]
    a. 45 minutes
    b. 10 minutes
    c. 20 minutes
    d. Until the readout doesn t vary by more than 3.0 °C for 30 seconds
23. 8.41 A liquid-in-glass thermometer must be verified against a thermometer traceable to a national standard when new and then at maximum intervals of?
    a. 3 months
    b. 6 months
    c. 1 year
    d. 5 years
24. 8.54 According to API MPMS Chapter 17.1, the preferred instrument for taking temperature is?
    a. A liquid-in-glass thermometer
    b. A portable electronic thermometer
    c. An in-line temperature probe
    d. A preferred instrument is not specified
25. 8.42 In motion is defined as continuously raising and lowering the probe above and below the desired temperature measurement depth, by approximately how much?
    a. 15cm [6 inches]
    b. 1metre [40 inches]
    c. 30cm [12 inches]
    d. 50cm [20 inches]
26. 8.30 API MPMS Chapter 7 describes a large temperature difference between upper, middle and lower reading as?
    a. Greater than 0.5°F [0.25°C]
    b. Greater than 1.0°F [2.0°C]
    c. Greater than 2.0°F [1.0°C]
    d. Greater than 5°F [2.5°C]
27. 8.17 If a tank has more than 4.5 m [15 feet] of liquid, what is the minimum number of temperature readings that must be taken?
    a. 3
    b. 5
    c. 1
    d. one every 1 m [3 feet]
28. 8.24 According to ISO 4268 [API Chapter 7] the minimum amount of time a stationary PET should stay in a product with a density greater than 935 kg/m3 is ?
    a. 10 minutes
    b. 1 minute
    c. 5 minutes
    d. Until the readout doesn t vary by more than 0.1°C [0.2°F] for 30 seconds
29. 8.39 An ASTM 59C [ASTM 59F-80] liquid-in-glass thermometer has a scale range of -18°C to 82°C [0°F-180°F]. What should the graduations on this thermometer be?
    a. 0.1°C [0.2°F]
    b. 0.25°C [0.5°F]
    c. 1.0°C [2.0°F]
    d. 0.5°C [1.0°F]
30. 8.33 When using a portable electronic thermometer, what is the minimum amount of time the probe must stay in a middle distillate of density 821.7 kg/m3 [API gravity 40.7] , if the probe is moving?
    a. 30 seconds
    b. 1 minute
    c. 2 minutes
    d. 5 minutes
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