SECTION 8 – TEMPERATURE MEASUREMENT

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1. 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 2. 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 3. 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 4. 8.45 What is the minimum number of temperatures to be taken in a tank containing less than 3m [10 feet] of product? a. 1 b. 3 c. 5 d. 2 5. 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 6. 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 7. 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 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. 8.48 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 10. 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. 11. 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] 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. 8.41 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 14. 8.35 Which ISO standard covers temperature determination? a. ISO 3171 b. ISO 4268 c. ISO 4512 d. ISO 4266 15. 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 16. 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 17. 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 18. 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 19. 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] 20. 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 21. 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 22. 8.03 Is a portable electronic thermometer required to have a low voltage indicator? a. Yes b. No c. d. 23. 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. 24. 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] 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. 8.17 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] 27. 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] 28. 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 29. 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. 30. 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 31. 8.37 Which API MPMS Chapter covers temperature determination? a. Chapter 3 b. Chapter 7 c. Chapter 8 d. Chapter 17 32. 8.20 What is the minimum amount of product needed for a temperature to be taken? a. Whenever there is sufficient material present to immerse the probe b. 30 cm [1 foot] c. One metre [3 feet] d. Temperatures should only be taken when the roof is floating freely 33. 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 34. 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 35. 8.34 A thermowell used to measure temperature must be filled with a suitable heat-transfer liquid. a. True b. False c. d. 36. 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 37. 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 38. 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 39. 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. 40. 8.51 The immersion time for a cup-case assembly is minimized by continually raising and lowering the assembly 0.3m [1 foot] above and below the desired temperature measurement point. a. True b. False c. d. 41. 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 42. 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 43. 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 44. 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 45. 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 46. 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] 47. 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. 48. 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 49. 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 50. 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 ให้ตรวจสอบชื่อนามสกุลว่ากรอกครบหรือไหม่ พร้อมกับตรวจข้อสอบว่าเลือกทำครบทุกข้อหรือไม่ ไม่ครบไม่ตรวจนะครับ

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