Ch 8-Gauging and calculations (c)

Question 1

What are the three types of gauging equipment?

Answer 1

Open, restricted and closed

Question 2

What does UTI stand for?

Answer 2

Ullage Temperature Interface

Question 3

What is restricted gauging equipment?

Answer 3

A portable electronic device, comprises of a calibrated tape terminating in a probe. The device is attached to a vapour lock on the tank

Question 4

How does restricted gauging equipment work?

Answer 4

When the probe contacts the cargo, a tone is generated and the level can be read on the tape

Question 5

Why is a restricted gauging device termed this way?

Answer 5

Because when the vapour lock is opened to allow the tape into the tank, a small quantity of the tank atmosphere is released through the device

Question 6

What is open gauging equipment?

Answer 6

A calibrated sounding tape with a brass ‘bob’ on the end

Question 7

How does open gauging system equipment work?

Answer 7

The tape is lowered through the tank ullage port. This involves exposing the tank contents to the open atmosphere and hence personnel may be affected

Question 8

When are open gauging systems not used?

Answer 8

If the ship is inerted or contains particularly toxic cargoes

Question 9

Why are closed gauging equipment named this way?

Answer 9

Because when in use, there is no release of the tank atmosphere to the deck

Question 10

When are closed gauging systems required?

Answer 10

For ships operating with inert gas

Question 11

What is sounding?

Answer 11

Measured from the bottom of the tank to the top of the liquid

Question 12

What is ullage?

Answer 12

From the gauging point to the top of the liquid

Question 13

What is on an ullage report?

Answer 13

• Tank number
• Observed ullage (m)
• Corrected ullage (m)
• Temperature (degrees C)
• Observed volume (m3)
• Density at observed temp
• Weight (MT)

Question 14

For what reason does the vessel calculate the quantity loaded?

Answer 14

As a cross-check on the bill of lading

Question 15

When measuring the cargo quantity, what must be measured (4)?

Answer 15

Liquid level in the tank
Liquid temperature
Trim
Water

Question 16

A manual gauging tape is referred to as which type of gauging system?

Answer 16

Open

Question 17

Table of volume correction factors are entered with…

Answer 17

Density and Temperature

Question 18

1 US barrel is equivalent to how many litres?

Answer 18

159

Question 19

A gauging system which does not release vapour into the atmosphere while a measurement is taken is referred to as a…

Answer 19

Closed system

Question 20

A gauging system which releases only a small quantity of vapour to the atmosphere through a vapour lock while a measurement is taken is referred to as a…

Answer 20

Restricted system

Question 21

Observed volumes of liquid are converted into standard volumes at which temperatures?

Answer 21

15 degrees C, 60 degrees F

Question 22

1 cubic meter of oil is equivalent to how many US barrels?

Answer 22

6.28981

Question 23

Fr most tank cargoes, what is the bill of lading based on?

Answer 23

Shore side measurements

Question 24

When working in metric units, (°C and cubic metres), with crude oil the volume correction table to be used is

Answer 24

54A

Question 25

When working in metric units, (°C and cubic metres), with products the volume correction table to be used is

Answer 25

54B

Question 26

An MMC or UTI gauging device is referred to as which type of gauging system?

Answer 26

Restricted

Question 27

An often used piece of equipment on a tanker is the UTI. What does the letter ‘I’ stand for?

Answer 27

Interface

Question 28

A radar gauge is referred to as what type of gauging system?

Answer 28

Closed