Question: Name the number of cab size for 4 Medium tanker
SQL: SELECT COUNT("Cab size") FROM "1-2155350-2" WHERE "Category" = '4 Medium tanker';

Question: Name the category for cab size Crew and Super tanker
SQL: SELECT "Category" FROM "1-2155350-2" WHERE "Cab size" = 'Crew' AND "Sub-category" = 'Super tanker';

Question: Name the capacity for Single cab size 2 Medium tanker
SQL: SELECT "Capacity (litres)" FROM "1-2155350-2" WHERE "Cab size" = 'Single' AND "Category" = '2 Medium tanker';