SECTION 8 – TEMPERATURE MEASUREMENT

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1. 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 2. 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] 3. 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 4. 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 5. 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] 6. 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 7. 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 8. 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 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. 8.02 Does API MPMS Chapter 7/ISO 4268 make any references to the construction of portable electronic thermometers? a. Yes b. No c. d. 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. 8.26 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 13. 8.03 Is a portable electronic thermometer required to have a low voltage indicator? a. Yes b. No c. d. 14. 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 15. 8.37 Which API MPMS Chapter covers temperature determination? a. Chapter 3 b. Chapter 7 c. Chapter 8 d. Chapter 17 16. 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 17. 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 18. 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 19. 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 20. 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] 21. 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. 22. 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 23. 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] 24. 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 25. 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 26. 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 27. 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 28. 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 29. 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 30. 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 ให้ตรวจสอบชื่อนามสกุลว่ากรอกครบหรือไหม่ พร้อมกับตรวจข้อสอบว่าเลือกทำครบทุกข้อหรือไม่ ไม่ครบไม่ตรวจนะครับ

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