SECTION 8 – TEMPERATURE MEASUREMENT
คำชี้แจง
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1. 8.28 When using a portable electronic thermometer what is an indication of temperature stabilization?
    a. Comparison with the side temperature on the tank
    b. Comparison with a cup-case thermometer
    c. Comparison with the last temperature recorded by the terminal
    d. Readout doesn t vary by more than 0.1°C [0.2°F] for 30 seconds
2. 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
3. 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
4. 8.29 What is the minimum number of temperatures to be taken on a marine vessel with tanks containing less than 3m [10 feet] of product?
    a. One per tank
    b. Three per tank
    c. Weighted average per tank
    d. Answers a., b. and c. are all wrong
5. 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
6. 8.11 Which standards address the earthing (grounding) of portable electronic thermometers?
    a. API MPMS Chapter 7/ISO 4268
    b. API MPMS Chapter 3/EI HM4
    c. API MPMS Chapter 8.1/ISO 3170
    d. API MPMS Chapter 17.9/EI HM49
7. 8.02 Does API MPMS Chapter 7/ISO 4268 make any references to the construction of portable electronic thermometers?
    a. Yes
    b. No
    c.
    d.
8. 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
9. 8.49 What temperature is to be used during an ROB survey if there is only 5 cm [2 inches] of liquid in the bottom of the tank?
    a. The measured temperature at the middle of the liquid
    b. Standard Temperature
    c. The average temperature of the product in the tank before it was discharged
    d. The temperature stated by the vessel s representative
10. 8.16 What must be done immediately before taking temperatures using a portable electronic thermometer?
    a. Set the temperature range selector.
    b. Earth (ground) the unit, after opening the gauge hatch or vapour control valve
    c. Check the battery for low voltage
    d. Earth (ground) the unit, before opening the gauge hatch or vapour control valve
11. 8.38 How should scale graduation marks be applied to a liquid-in-glass thermometer?
    a. They must be etched permanently on the stem of the thermometer
    b. They must be etched permanently on the cup-case assembly
    c. They must be on a metal plate attached to either the thermometer or the cup-case assembly
    d. Answer a., b. or c. is correct
12. 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
13. 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.
14. 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
15. 8.46 When taking the temperature of a product in a tank and there is more than 1°C [2 °F] difference between upper, middle and lower temperatures, what steps should be taken?
    a. Retake the temperatures since there must be an error
    b. Use the middle temperature only for the entire tank contents
    c. Average the upper, middle and lower temperatures
    d. Take temperatures at more frequent, equally-spaced vertical increments
16. 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
17. 8.37 Which API MPMS Chapter covers temperature determination?
    a. Chapter 3
    b. Chapter 7
    c. Chapter 8
    d. Chapter 17
18. 8.19 The quickest way to stabilize the reading from a portable electronic thermometer (PET) is to?
    a. Allow the probe to stay in the product for twice the required time
    b. Move the probe up and down at least 30 cm [1 foot] above and below the spot the temperature is to be taken
    c. Use fresh batteries
    d. There is no way to speed up the stabilization process
19. 8.07 When verifying a portable electronic thermometer with a range of 0 to 95 °C [32 to 200°F] , what is the maximum permissible error before it should be recalibrated?
    a. ± 0.3 °C [0.2°F]
    b. ± 0.05 °C [0.1°F]
    c. ± 1.0 °C [2.0°F]
    d. Answers a., b. and c. are all wrong - it must be exact
20. 8.52 What procedure is used to field check a liquid-inglass thermometer in a cupcase assembly?
    a. It is checked against a portable electronic thermometer
    b. It is checked it against the ship’s thermometer
    c. it is checked for cracks, cleanliness and a readable scale and the liquid column is checked as unbroken
    d. It is placed in a 100°F water bath with a certified thermometer for 45 minutes and compare the readings. They must be within 0.2°C [0.1°F]
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