Gasco exit exam questions and answers are given below as per dg shipping exit exam.
- What is the lower flammability limit of butane in % volume hydrocarbon of propane in air :
- 9.5
- 8.5
- 2.2 *
- 1.9
Deep well pump shaft bearing are cooled and lubricated by liquid
- Cargo being pumped*
- Hydraulic oil
- Grease
- Inert gas
- The study of behaviour of matter at low temperature is called
- Seismology
- Hydrograph
- Cryogenics *
- Ecology
- Fixed gas detection system alarms should be activated when the vapour concentration reaches
- 5 *
- 20
- 30
- 60
- A device fitted in gas vent pipeline to arrest the passage of flame Into enclosed space
- Flame arrestor *
- Explosion proof
- Flame screen
- Gas free
- Chemical combination of flammable substance with oxygen is called
- Explosion
- Auto ignition
- Combustion *
- None of the above
- In an LNG carrier mixture of methane and air are avoided at all time . what is the reason ?
- Risk of fire or explosion *
- Degradation of cargo quality
- Dilution of cargo
- Dilution of cargo
- Which cargo operation are to be recorded in cargo record book :
- All bunker operations
- All petroleum cargo operations
- All cargo operations involving NLS
- All cargo operations *
- When cargo carried as liquid in cargo tanks and not shipped in drums , containers , or packages , what are they called as
- Liquid cargo
- Tank cargo
- Oil cargo
- Bulk cargo *
- Gas ship accommodation and machinery space are :
- Hazardous area
- Gas safe *
- Gas dangerous
- All the above
- What is the hazards – reactivity when cargo reacts with water called
- Hydrate formation *
- Polymerization
- Toxic vapour
- None of the above
- Fire fighting technique with a pool fire is to sweep
- Side to side
- Front to back
- Both A and B *
- None of the above
- The mass of a Vapour compared with the mass of an equal volume of air both at standard condition to temp and pressure is
- Relative liquid density
- Relative vapour density *
- Relative density
- None of the above
- All account accommodation ventilation system should be stopped or operated on closed cycle if there is possibility of cargo vapour being drawn into accommodation space
- True *
- False
- What is the liquid relative density at atm. Boiling point for ethylene
- 0.57 *
- 0.65
- The term “overall damage” includes both safety hazards and pollution hazard.
- True *
- False
- Removal of liquid from the cargo tank may cause ______ in inter barrier space pressure and these should be monitored throughout the discharge
- Same
- Change *
- Leak
- None of the above
- Changing of cargo which may involve
- Only gas freeing
- Only inerting
- Only gassing up
- All of the above *
- On which type of cargo tank would you find a bimetallic joint or STJ
- Kvaerner Moss Type B *
- Gas transport membrane
- Type C
- Prismatic Type A
- If the cargo density is different from that specified the float gauge manufacturer what will you adjust
- Float correction *
- Trim correction
- List correction
- Tape correction
- The frequency of pressure testing ashore of BA set should at least every
- 6 years
- 5 years *
- 10 years
- 15 years
- What is the guiding rule for limiting pressure surge on loading or discharging
- Stop the cargo pump
- First close ESD valve nearest to the pump
- Finally close other ESD valve
- All the above *
- The ventilation of the airlock should be of the ______ pressure type
- Negative
- Positive *
- Neutral
- None of the above
- Why is it necessary to cool down cargo tanks (refrigerated ships) during bulk loading
- To avoid overflow
- To avoid vapors emission
- To avoid vacuum in cargo tank
- To avoid excessive tank pressure *
- An overdose of toxic petroleum vapour effects your sense of smell by
- Reducing it temporarily
- Taking it away completely *
- Improving it temporarily
- Improving it permanently
NEXT