SECTION 8 – TEMPERATURE MEASUREMENT

SECTION คำชี้แจง
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1. 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
2. 8.06 On a portable electronic thermometer, what should be checked at least once per month?
    a. The junction between the cable and the probe for mechanical damage
    b. The cable insulation for cuts, breaks, or abrasion.
    c. Two or more temperatures near the ends of the range of the probe
    d. Answers a., b. and c. are all correct
3. 8.31 What is the maximum amount by which the reading on a portable electronic thermometer can vary when it may be considered to have stabilized?
    a. 0.3 °C [0.5°F]
    b. 1 °C [2.0°F]
    c. No variation is permitted
    d. 0.1 °C [0.2°F]
4. 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
5. 8.37 Which API MPMS Chapter covers temperature determination?
    a. Chapter 3
    b. Chapter 7
    c. Chapter 8
    d. Chapter 17
6. 8.44 When using a liquid-in-glass thermometer in a cup-case assembly to measure a product with density of 904 kg/m3 [API gravity 24.9] what is the minimum length of time the thermometer should be immersed in the liquid when the assembly is in motion during the measurement process?
    a. 5 minutes
    b. 10 minutes
    c. 20 minutes
    d. Until the readout doesn t vary by more than 0.2 °C for 30 seconds
7. 8.35 Which ISO standard covers temperature determination?
    a. ISO 3171
    b. ISO 4268
    c. ISO 4512
    d. ISO 4266
8. 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]
9. 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
10. 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
11. 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
12. 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.
13. 8.10 To what increment should the display of a portable electronic thermometer be capable of reading?
    a. 0.5 °F or °C
    b. 0.1 °F or °C
    c. 1.0 °F or °C
    d. 0.25 °F or °C
14. 8.09 What is the minimum acceptable accuracy for a portable electronic thermometer when it is indicating a temperature reading of 101 °C [215°F]?
    a. ± 1.0 °C [2.0°F]
    b. ± 0.5 °C [1.0°F]
    c. ± 0.3 °C [0.5°F]
    d. ± 0.75 °C [1.5°F]
15. 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
16. 8.14 When using a liquid-in-glass thermometer it is important to consider that
    a. It should remain in the oil long enough to reach the temperature of the liquid
    b. It takes longer to obtain temperatures with a liquid in glass thermometer than a portable electronic thermometer
    c. It should be lowered using a gauging tape
    d. Answers a. and b are correct
17. 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
18. 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
19. 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
20. 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.
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