LGTF 4

___Gas is lead into loading arms from injection lines connected to the arms before cargo loading?

• HC

• H2S

• Nitrogen

• CO

Air purge comes to an end when the oxygen content of the purged gas has dropped below ____

• 5%

• 2%

• 8%

• 1%

At a discharge port, the arms are cooled down by sending in LNG by

• Ship's spray pump

• Shore small capacity pump

• Shore pump

• None are correct

Primary reason for cooling the cargo line is

• minimize the possibility of leaks at joints

• reduce the possibility of sudden shock loading

• to avoid the formation of vapor locks in the pipelines

• All are correct

Ultrasonic gauges operate on a similar principle to

• open gauging system

• float gauges

• echo sounders

• All are correct

Radar gauges works at very high frequencies - approximately ___

• 11 ghz

• 11 mhz

• 9 ghz

• 9 mhz

____is a small portion of LNG which is retained onboard following the cargo discharge to keep the cargo tanks cool.

• Cargo trim

• Cargo heel

• Topping off cargo

• Topping up cargo

Relief valves will be set at a comparatively ___ value for fully refrigerated ships.

• lower

• higher