CREATE TABLE "table1_2155350_2" (
  "category" text,
  "sub_category" text,
  "cab_size" text,
  "drive_wheels" text,
  "capacity_litres" text
);

Question: Name the number of cab size for 4 medium tanker
SQL: SELECT COUNT("cab_size") FROM "table1_2155350_2" WHERE "category"='4 Medium tanker';

Question: Name the category for cab size crew and super tanker
SQL: SELECT "category" FROM "table1_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 "table1_2155350_2" WHERE "cab_size"='Single' AND "category"='2 Medium tanker';