SECTION 7 - TANK GAUGING
คำชี้แจง
- ข้อสอบชุดนี้มีเพียง 30 ข้อ
- ถ้าไม่กรอกทั้งชื่อ และนามสกุลของผู้ทำข้อสอบ ระบบจะไม่ตรวจข้อสอบให้
- ผลสอบจะเก็บเพียง 300 ระเบียนสุดท้าย โดยเรียงจากเวลาล่าสุด
- ถ้าทำข้อสอบไม่ครบ ระบบจะไม่ตรวจข้อสอบให้
- ผู้ทำข้อสอบจะมีเวลาในการทำข้อสอบเพียง 30 นาที หากเกินเวลา ระบบจะไม่ตรวจข้อสอบให้
- เมื่อมีการตรวจคำตอบ ระบบจะบันทึกชื่อ และคะแนนลงฐานข้อมูล พร้อมเวลาเริ่มทำ และเวลาสิ้นสุด
- เกณฑ์ตัดสินผ่านการทดสอบอยู่ที่ร้อยละ 80 หรือ 24 ข้อขึ้นไป
หากต้องการพิมพ์ใบรับรองผลคะแนน โปรดใช้เครื่อง Computer ในการทดสอบและมีจำนวนข้อที่ใช้สอบจำนวน 20 ข้อขึ้นไป และจะแสดงผลสำหรับผู้ที่ผ่านเกณฑ์การสอบเท่านั้น โดยเกณฑ์การสอบอยู่ที่ร้อยละ 80 หรือ 24 ข้อขึ้นไป คลิกที่นี่เพื่อเพิ่มจำนวนข้อทดสอบ
1. 7.19 Which gauge measures the distance from the datum plate or tank bottom to the surface of the liquid?
    a. Innage
    b. Ullage
    c.
    d.
2. 7.26 To determine the ullage of the liquid in a tank using an innage tape and bob assembly, what procedure should be followed?
    a. Read the immersion depth of the tape at the reference gauge point and subtract the oil cut reading on the bob
    b. Read the immersion depth of the tape at the reference gauge point and add the oil cut reading on the bob
    c. Subtract the oil cut on the bob from the tank reference gauge height indicated on the tank capacity table
    d. Subtract the oil cut on the bob from the measured tank reference gauge height
3. 7.45 When would a check be made for water on the top of a cargo?
    a. If the observed density is less 1000 kg/m3 [observed API gravity greater than 10.0]
    b. If the observed density is greater 1000 kg/m3 [observed API gravity less than 10.0]
    c. It is never necessary to check for the presence of water on top of a cargo
    d. Only for fuel oil cargoes
4. 7.47 If during gauging, the water cut falls on the clip of the gauge tape, what must be done?
    a. Repeat the water cut measurement using a water bar
    b. Repeat the water cut taking an ullage of the water
    c. Interpolate the cut
    d. Answers a. and b. are correct
5. 7.30 When using water finding paste in heavy oils, which of the following actions should you take to enable the paste to be read more easily?
    a. Gently blowing on the gauging bar to remove the heavy oil.
    b. Use a soft cotton rag or towel to remove the excess oil
    c. Use a suitable solvent to gently wash to the surface of the paste.
    d. Immerse the gauging bar in a container full of light product such as gasoline.
6. 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.
7. 7.40 If the density of a product within a tank is greater than the density of water, where would any free water in this tank be found?
    a. No free water would be found it as it would not settle out of this product but would remain in suspension
    b. On top of the product
    c. Below the product
    d. Answers a., b. and c. are all wrong
8. 7.03 A tank capacity table is also referred to as a tank strapping table
    a. True
    b. False
    c.
    d.
9. 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.
10. 7.08 An innage gauge bob is pointed to aid in penetration of tank non-liquid. Where is its zero point?
    a. Top of the eye
    b. Bottom of the eye
    c. Tip of the bob
    d. Inside of the tape swivel
11. 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
12. 7.56 What action should an inspector take when requested to set a stop gauge?
    a. Refuse, it s not an inspector s reponsibility
    b. Follow the company s procedure
    c. Set the stop gauge and take full responsibility
    d. Tell the vessel/terminal personnel to set the stop and then check it for accurac
13. 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.
14. 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.
15. 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
16. 7.12 On a shore tank, what is the term for the distance between the Reference Gauge Point and the Datum Point, as measured at the time of gauging?
    a. Observed reference point
    b. Reference gauge height
    c. Total gauge height
    d. Observed reference height
17. 7.48 What is the minimum amount of time the bob should stay in position while water cutting a heavy crude oil?
    a. 10 seconds
    b. 30 seconds
    c. 60 seconds
    d. There is no set time
18. 7.21 What is the measured distance from the datum plate or tank bottom to the reference gauge point called?
    a. The observed reference height
    b. The innage gauge height
    c. The reference gauge height
    d. The ullage gauge height
19. 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.
20. 7.44 How are free water measurements normally taken?
    a. By the innage method
    b. By the ullage method
    c. By the Heimlich method
    d. Answers a. and b. are correct
21. 7.33 The use of non-slotted standpipes is not recommended for custody transfer measurements.
    a. True
    b. False
    c.
    d.
22. 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
23. 7.49 When is a provisional gauge or insurance gauge taken prior to the official gauge?
    a. When the official gauge will not be taken for a significant period of time after completion of cargo operations.
    b. When it is required by your employer s insurance company
    c. When it is required by the Charter Party
    d. Answers a., b. and c. are all correct
24. 7.31 To try to ensure gauging accuracy in shore tanks, what is the minimum recommended number of dips/gauges?
    a. 1
    b. 2 identical dips out of three
    c. 3 identical dips out of 4
    d. 4 dips, averaged
25. 7.37 Can accurate volumes be obtained by gauging a tank while the roof is in the critical zone?
    a. Yes, when the tank legs are on low setting
    b. Yes, when the tank legs are on high setting
    c. No, it cannot be done
    d. No, unless it is an internal floating roof
26. 7.01 What is commonly meant by the term dip?
    a. Ullage
    b. Innage
    c. Free water measurement
    d. Swing gauge
27. 7.53 When inspecting a series of rail tank cars the liquid outage/ullage level must be measured in all cars
    a. True
    b. False
    c.
    d.
28. 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
29. 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
30. 7.25 If a portable measurement unit (PMU) is used, which of the following procedures should be followed to measure free water on a vessel before discharge?
    a. Rely on the PMU alone for free water level measurement
    b. Use water-finding paste with a sounding rod/rule or dip tape
    c. Answers a. and b. are both correct
    d. Recommend to the terminal that the free water received and measured ashore be applied to the vessel figures
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