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SECTION 7 - TANK GAUGING

1. 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.
2. 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
3. 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
4. 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
5. 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]
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. 7.15 An innage (dip) tape and bob may be used to take an outage (ullage) gauge.
. a. True
. b. False
.
.
8. 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
9. 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
10. 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
11. 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
12. 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
13. 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.
14. 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
15. 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
16. 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
17. 7.01 What is commonly meant by the term dip?
. a. Ullage
. b. Innage
. c. Free water measurement
. d. Swing gauge
18. 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
19. 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
20. 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

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