SECTION 7 - TANK GAUGING
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1. 7.07 What is water finding paste used for?
    a. To determine the S&W of the product in the tank
    b. To detect the presence of suspended water within the product in the tank
    c. To indicate the product / free water interface within the tank
    d. Answers a., b. and c. are all wrong
2. 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.
3. 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
4. 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
5. 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
6. 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
7. 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
8. 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
9. 7.15 An innage (dip) tape and bob may be used to take an outage (ullage) gauge.
    a. True
    b. False


10. 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
11. 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%
12. 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.
13. 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.
14. 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.
15. 7.23 When taking a level measurement three gauge tape readings should be within___
    a. 12mm or 1/2 inch
    b. 6mm or 1/4 inch
    c. 3mm or 1/8 inch
    d. 9mm or 1/3 inch
16. 7.46 Which of the following is acceptable for the determination of free water for marine vessel custody transfer measurements?
    a. A zone sampler
    b. A portable measurement unit (PMU)
    c. A bob with water-finding paste
    d. Answers b. and c. are correct
17. 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
18. 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
19. 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
20. 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
21. 7.11 What is the distance between the point where the floating roof begins to rest on its normal supports and the point where it begins to float freely known as?
    a. The floating level
    b. The lower leg level
    c. The critical zone
    d. The displacement level
22. 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
23. 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
24. 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.
25. 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.
26. 7.42 How often should a working gauge tape be inspected for wear and tear?
    a. Daily or prior to each use
    b. Once per week
    c. Once per month
    d. Once per year
27. 7.20 Which gauge measures the distance from the surface of the liquid to the tank reference gauge point?
    a. Innage or dip
    b. Ullage
    c.
    d.
28. 7.27 Which industry documents describe the procedures for the gauging of petroleum or petroleum products?
    a. API MPMS Chapter 17.1/EI HM28
    b. API MPMS Chapter 17.9/EI HM49
    c. API MPMS Chapter 3/EI HM4
    d. API MPMS Chapter 1/EI HM0
29. 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.
30. 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
31. 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.
32. 7.52 What do slip-tube gauging devices on rail tank cars measure?
    a. Any liquid in the tank car deeper than 75 mm [3 ]
    b. Any liquid under positive pressure in a tank car
    c. Any vapour in a tank car
    d. Any vapour with a depth greater than 1.2 m [4 feet]
33. 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
34. 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
35. 7.09 What is the observed gauge height of a tank?
    a. The distance from the reference gauge point to the bottom of the tank or the datum plate as measured during the gauging operation
    b. The distance from the reference gauge point to the bottom of the tank or the datum plate as shown on the tank capacity tables
    c. The distance from the ullage pipe to the liquid level
    d. Usually written somewhere on the ullage pipe
36. 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
37. 7.22 What is the term for the distance from the datum plate or tank bottom to the reference gauge point, as shown on the tank capacity table?
    a. Observed gauge height
    b. Innage gauge height
    c. Reference gauge height
    d. Ullage gauge height
38. 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
39. 7.51 If a tank s capacity table is an innage or dip table, what is the preferred method of gauging?
    a. Side Gauge
    b. Ullage
    c. Innage or dip
    d. Outage
40. 7.55 What is the purpose of a floating roof correction in a shore tank calculation?
    a. To account for the compression of the liquid due to the roof weight
    b. To account for the volume of liquid displaced as a result of the weight of the roof
    c. To allow for the effect of the roof temperature on the temperature of the product
    d. To allow for the effect of the temperature on the thickness of the roof
41. 7.57 When setting a min/max stop gauge an inspector should:
    a. Make calculations and provide the gauge closest to the requested volume
    b. Inspector s don t set stop gauges
    c. Tell the terminal to set the stop and you will check it for accuracy
    d. Make calculations and provide the gauge closest to the requested volume without exceeding the volume to be transferred
42. 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
43. 7.36 When gauging a shore tank the tape should be read to the nearest 6mm [1/4 inch]?
    a. True
    b. False
    c.
    d.
44. 7.16 An ullage gauge is the same thing as an outage gauge.
    a. True
    b. False
    c.
    d.
45. 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
46. 7.10 What is innage or dip?
    a. The distance from the datum plate or the tank bottom to the surface of the product
    b. The measurement from the tank bottom to reference point
    c. The cut found on the bob
    d. The distance from the reference point to surface of the product
47. 7.39 When inspecting Heavy Fuel Oil is it necessary to check for free water?
    a. Yes
    b. No
    c.
    d.
48. 7.35 When gauging a tank by the innage method, a comparison between the observed and reference gauge height is made to ensure which of the following?
    a. The gauge tape and bob are suspended in a vertical position within the tank.
    b. The gauge bob is in contact with the tank bottom or datum plate
    c. The tape has not been lowered too far into the tank
    d. Answers a., b. and c. are all correct
49. 7.03 A tank capacity table is also referred to as a tank strapping table
    a. True
    b. False
    c.
    d.
50. 7.50 What is one of the problems with water finding paste?
    a. It tends to freeze in cold weather
    b. It does not perform consistently with all crudes
    c. Tends to run down the bob
    d. It is easily confused with gasoline paste
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