SECTION 8 – TEMPERATURE MEASUREMENT

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1. 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] 2. 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] 3. 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 4. 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 5. 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. 6. 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 7. 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] 8. 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. 9. 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 10. 8.03 Is a portable electronic thermometer required to have a low voltage indicator? a. Yes b. No c. d. 11. 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 12. 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 13. 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 14. 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] 15. 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 16. 8.25 According to API MPMS Chapter 7 the minimum amount of time that an in motion probe should stay in a product with an API gravity less than 20 is? a. 80 minutes b. 30 minutes c. 75 seconds d. 10 seconds 17. 8.35 Which ISO standard covers temperature determination? a. ISO 3171 b. ISO 4268 c. ISO 4512 d. ISO 4266 18. 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 19. 8.37 Which API MPMS Chapter covers temperature determination? a. Chapter 3 b. Chapter 7 c. Chapter 8 d. Chapter 17 20. 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. 21. 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 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. 8.24 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 24. 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 25. 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 26. 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 27. 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 28. 8.21 To what increment should a portable electronic thermometer be read and recorded? a. The nearest 0.5°C or °F b. The nearest 1°C or °F c. The nearest 0.1°C or °F d. Answers a.,b. and c. are all wrong. 29. 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 30. 8.50 A 4 000m3 [25 000bbl ] capacity storage tank has a depth of product of 4.70 m [15 feet] in the tank. What is the minimum number of temperature measurements that should be obtained on this tank. a. One b. Two c. Three d. Five ให้ตรวจสอบชื่อนามสกุลว่ากรอกครบหรือไหม่ พร้อมกับตรวจข้อสอบว่าเลือกทำครบทุกข้อหรือไม่ ไม่ครบไม่ตรวจนะครับ

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