SECTION 7 - TANK GAUGING

คำชี้แจง

- ถ้าไม่กรอกทั้งชื่อ และนามสกุลของผู้ทำข้อสอบ ระบบจะไม่ตรวจข้อสอบให้

- ส่วนนี้จะไม่มีการบันทึกผลสอบ หากต้องการบันทึกโปรดสมัครสมาชิก

- ถ้าทำข้อสอบไม่ครบ ระบบจะไม่ตรวจข้อสอบให้

- ผู้ทำข้อสอบจะมีเวลาในการทำข้อสอบเพียง 30 นาที หากเกินเวลา ระบบจะไม่ตรวจข้อสอบให้

- เกณฑ์ตัดสินผ่านการทดสอบอยู่ที่ร้อยละ 80 หรือ 16 ข้อขึ้นไป

ส่วนนี้จะไม่มีการบันทึกผลสอบ และแสดงเฉลยแบบทดสอบ หากต้องการบันทึก และรายงานการทำแบบทดสอบ โปรดสมัครสมาชิก

1. 7.01 What is commonly meant by the term dip? a. Ullage b. Innage c. Free water measurement d. Swing gauge
2. 7.15 An innage (dip) tape and bob may be used to take an outage (ullage) gauge. a. True b. False
3. 7.54 The floating roof of a shore tank displaces a certain volume of liquid when it is floating freely. What is the weight of the volume of liquid displaced equal to? a. The weight of the roof and attached deadwood b. The weight of the roof less the attached deadwood c. The weight of the roof adjusted for the density of the tank contents d. Answers a., b. and c. are all wrong
4. 7.34 When gauging a terminal storage tank prior to loading a barge, an inspector notes that his observed gauge height does not match the reference gauge height. On gauging the same tank on completion of loading the barge he again observes the same difference in observed and reference gauge heights, such that both opening and closing observed gauge height readings are identical. Can the gauges obtained be used for determining the loaded volume? a. Yes b. No c. d.
5. 7.06 What does an outage/ullage measure? a. The distance from the tank datum plate or bottom to the tank reference point. b. The distance from the surface of a liquid in a tank to the reference gauge point of the tank. c. The amount of product transferred out from a tank. d. The level of liquid in a tank measured from the tank bottom to the surface of the liquid.
6. 7.14 When rainwater or snow accumulates on the roof of an external floating roof tank, what will happen to the gauged level in the tank? a. It will decrease b. It will remain the same c. It will increase d. Answers a., b. and c. are all wrong
7. 7.28 When gauging light products, it is permissible to use chalk or talcum powder to facilitate reading the cut on the tape. a. True b. False c. d.
8. 7.29 When using water finding paste in light products, how long should the gauging bar be left in position? a. A minimum of 5 seconds b. A minimum of 10 seconds c. A minimum of 30 seconds d. A minimum of 45 seconds
9. 7.04 What is a master tape? a. The only tape that may be used to take custody transfer measurements b. A tape belonging to the National Certification Body c. A tape to be used only for tank calibration d. A reference tape, traceable to National Standards to be used only for verifying the accuracy of tapes used in the field
10. 7.38 If there is a discrepancy between Reference Gauge Height and Observed Gauge Height when gauging a shore tank what action should be taken? a. Adjust the gauge to observed reference height b. Ullage the tank c. Recheck the gauge, make a note of the difference and inform your supervisor d. The difference can be ignored it as long as the ship to shore difference does not exceed 0.5%
11. 7.17 According to API MPMS Chapter 3.1A/EI HM4, when must gauge tapes be verified for accuracy? a. Before initial use and once per year b. Once per month c. Before each use d. Once every three months
12. 7.41 According to common industry practice, How often must a gauging tape be checked for accuracy by comparison against a traceable master tape? a. Prior to each use b. Every six months c. Prior to initial use and at least annually d. At least once per week
13. 7.39 When inspecting Heavy Fuel Oil is it necessary to check for free water? a. Yes b. No c. d.
14. 7.18 Some measurement systems are gas-tight (closed) and other systems (restricted) permit some vapour to escape around the Portable Measurement Unit (PMU) when tanks are under positive pressure. a. True b. False c. d.
15. 7.24 Which of the following can affect the accuracy of tank s capacity table? a. The flexing of the tank bottom with the transfer of contents b. Expansion at the vertical middle (barreling) occuring during filling c. Accumulated deposits of previous contents on the tank shell d. Answers a., b. and c. are all correct
16. 7.32 For what reasons may a quantity of free water (water bottoms) be maintained within a shore tank? a. To permit easy determination of the shore tank free water quantity. b. So that a certain percentage of free water can be pumped with each movement in order to aid in S&W blending of cargoes. c. To negate any effect that bottom flexing of the tank bottom would have on tank measured quantities. d. To aid in detection of any product seepage from the tank.
17. 7.43 Which of the following statements regarding reference gauge heights is correct? a. They should be recorded from the calibration tables, before you start the tank gauging b. They should be checked against the observed gauge heights c. They should be included in the inspection report d. Answers a., b. and c. are all correct
18. 7.02 What occurs when a shore tank is filled to a level in the critical zone? a. The flexing bottom of a tank is at its highest point b. The tank will overflow if more liquid is added c. The floating roof is no longer resting on its legs d. The floating roof is only partially afloat and the capacity table may be inaccurate
19. 7.13 What is a tank datum plate? a. The position on a tank where the gauge height is noted. b. The point marked on the gauge hatch of a tank to indicate the position from which the tank is to be gauged. c. The plate on the tank shell that lists the tank general data such as roof weight, height of tank, etc. d. A plate placed in the tank and directly under the reference gauge point to provide a fixed contact surface.
20. 7.05 What does an innage/sounding measure? a. The distance from the surface of the liquid in the tank to the reference gauge point of the tank. b. The distance between the point where the floating roof of the tank is floating freely and the point where it is resting fully on it s supports. c. The level of liquid in a tank measured from the datum plate or tank bottom to the surface of the liquid. d. The distance from the tank datum plate or bottom to the tank reference gauge point.
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