- The purpose of remotely controlled measuring of tank levels are to measure
- Height from liquid surface to top stringers in the tank
- Height of the liquid in the tank *
- Height from bottom shell to top stringers in the tank
- Height of bottom girders in the tank
- One of the following is NOT an alarm on an inert gas plant, which one?
- Low pressure alarm
- Low oxygen Alarm *
- Deck sea Low water Alarm
- Scrubber high water level alarm
- While commencement of loading Cargo direct high pressure loading is advisable
- True
- False *
- On all gas ships, any pipework entering or leaving the cargo tank must do so through the ____ of the tank
- Aft end
- Top *
- Bottom
- Forward end
- If a centrifugal pump operating with a positive suction head becomes air bound, your FIRST response should be to _____
- Vent the casting *
- Tighten the packing
- Close the discharge
- Re-prime the pump
- How much cleaner is natural gas to burn?
- Reducing Carbon Dioxide (CO2) emissions by 20% to 30% *
- Reducing carbon monoxide (CO) emissions up to 75%
- Reducing nitrous oxide (NO2) emission by appropriately 50%
- All the above
- Self contained breathing apparatus – SCBA is also called as
- Compressed air breathing apparatus – CABA *
- EEBD
- ELSA
- None of the above
- The space enclosed by the ships structure in which a cargo Containment system is situated called ______
- Hold space *
- Compressor room
- Motor room
- Engine room
- This liquefied gas is normally carried in its fully refrigerated condition at its atmospheric boiling point of -104 degree C is ______
- Ethylene *
- Propane
- Butane
- Ammonia
- How is cooling/Cleaning water supplied to the inert gas scrubber tower?
- By the main sea water pumps
- By the cargo condenser pump
- By the scrubber sea water pump *
- By the deck seal sea water pump
- Which safety device is fitted on the deck inert gas line to monitor the supply condition of the inert gas?
- The inert gas high temperature alarm
- The inert gas low flow alarm
- The inert gas low pressure alarm *
- The inert gas reverse flow alarm
- Tank relief V/V used for release of excessive pressure
- True *
- False
- What characteristics should insulation materials possess for use in gas carriers?
- Low thermal conductivity, ability to bear loads
- Ability to with stand mechanical damage, lightweight
- Unaffected by cargo liquid or vapour
- All the above *
- Which of the following is the ultimate source of energy for us?
- LNG
- Nuclear
- Solar *
- CNG
- Why strainers are commonly installed in the cargo piping system?
- To protect the cargo handling plant
- To protect equipment from damage by foreign objects
- Both A and B *
- None of the above
- Which of these would you consider essential equipment to carry when working on the deck of ship carrying ammonia?
- Gloves
- Personal O2 meter
- Gas mask          *
- Personal Hydrocarbon alarm
- What is the condition of inert gas as it is produced by the boilers or inert gas generator?
- Free of oxygen and clean *
- Hot and containing soot particles
- Dirty and saturated
- Super heated and black or greyish in colour
- For what reason cargo sampling is necessary in gas tanker?
- To establish safe conditions prior to cargo transfer
- To establish that the cargo is within commercially agreed specifications at various Pumps
- Both A and B *
- None of the above
- What is the MAIN danger to be guarded against when discharging using a cargo heater with sea water as the heating medium?
- Over pressurizing of the gas side of the water
- Freezing of the water side of the heater *
- Over pressurizing of the water side of the heater
- Overheating of the gas side of the heater
- Magnesium, Titanium, Sodium, Lithium and Potassium are classified as
- Class A fire
- Class B fire
- Class C fire
- Class D fire *
- What are the symptoms of Asphyxiant , when LPG and LNG carried as cargo?
- Increased rate and dept of respiration and loss of consciousness
- Blueness of the skin (Cyanosis)
- Stertorous breathing with a snoring sound
- All of the above *
- Inert gas- How is sea water supplied to the deck seal ?
- Through the main sea water pumps or through the condenser cargo pump
- Through a sea water aggregate pump fitted on the cargo deck
- Through the deck fire line
- Through the deck seal pump fitted in the engine room *
- On tank vessels, which of these valve types is most commonly used in conjunction with hydraulically actuated controls?
- Non return valves
- Globe valves
- Butterfly valves *
- Gate valves
- What is critical temperature of methane in degree Celsius ?
- -82.5 *
- 82.5
- 52.8
- None of the above
- On tank vessels equipped with the power operated cargo tank valves, the type of power operator most commonly used is _____
- Hydraulic *
- Electric
- Steam
- Diesel
- The valve best suited for throttling gas or liquid flow in a pipe line is the _____
- Globe valve *
- Gate valve
- Check valve
- Pug cock
- What is the boiling point at atmospheric pressure of ammonia
- -42 degree Celsius
- -34 degree Celsius *
- -5 degree Celsius
- None of the above
- Which tanks are completely supported self-supporting and do not form part of the ship’s hull structure
- Independent tanks *
- Membrane tank
- Semi membrane tank
- None of the above
- Ammonia forms explosive compounds with
- Mercury alone
- Mercury, chlorine, iodine, bromine, calcium, silver oxide and silver hypo chlorite *
- Silica
- Water
- A bigger spell of LPG will be visible as a _____ which is condensed water vapour from the atmosphere
- White cloud *
- Blue cloud
- Black cloud
- None of the above
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GASCO exit exam questions and answers 2.0