SECTION 8 – TEMPERATURE MEASUREMENT

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1. 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. 2. 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] 3. 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] 4. 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 5. 8.35 Which ISO standard covers temperature determination? a. ISO 3171 b. ISO 4268 c. ISO 4512 d. ISO 4266 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. 8.04 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 8. 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 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. 8.27 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 11. 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 12. 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 13. 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. 14. 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 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. 8.48 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 17. 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 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. 8.44 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 20. 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 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. 8.21 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. 23. 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 24. 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 25. 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 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. 8.06 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 28. 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. 29. 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 30. 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] 31. 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 32. 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 33. 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 34. 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 35. 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. 36. 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] 37. 8.34 A thermowell used to measure temperature must be filled with a suitable heat-transfer liquid. a. True b. False c. d. 38. 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 39. 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 40. 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] 41. 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 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. 8.28 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 44. 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 45. 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. 46. 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 47. 8.37 Which API MPMS Chapter covers temperature determination? a. Chapter 3 b. Chapter 7 c. Chapter 8 d. Chapter 17 48. 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 49. 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] 50. 8.03 Is a portable electronic thermometer required to have a low voltage indicator? a. Yes b. No c. d. ให้ตรวจสอบชื่อนามสกุลว่ากรอกครบหรือไหม่ พร้อมกับตรวจข้อสอบว่าเลือกทำครบทุกข้อหรือไม่ ไม่ครบไม่ตรวจนะครับ

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