100+ Free STCW Basic Gas Tanker Practice Questions

STCW Basic Training for Liquefied Gas Tanker Cargo Operations (Regulation V/1-2, standard of competence in Table A-V/1-2-1) qualifies seafarers for cargo duties on LNG, LPG, ammonia and ethylene carriers. Built on IMO Model Course 1.04, it runs about 3-4 days and ends in a written, commonly multiple-choice, assessment. Content spans gas physical and chemical properties (boiling points such as methane -162C, propane -42C, ammonia -33C, ethylene -104C; methane flammable range 5-15%; ~600:1 LNG expansion); hazards including cryogenic burns, brittle fracture of carbon steel, asphyxiation, ammonia toxicity, BLEVE and rollover; gas-measuring instruments (oxygen analysers, explosimeters, tankscopes, toxic detectors); safety equipment such as water spray, PPE, inerting, drying, purging and gas-freeing; firefighting with dry chemical powder (water is never applied to cryogenic spills); emergency procedures including ESD; and pollution prevention under the IGC Code and MARPOL. Prerequisite is basic safety training A-VI/1; an alternative is at least three months of approved gas tanker sea service. A certificate of proficiency is issued on passing.