Question: On what date were 5 built with 4-4-2T wheels?
SQL: SELECT "Date" FROM "2-1169552-16" WHERE "No. built" = 5.0 AND "Wheels" = '4-4-2T';

Question: On what date was the number of locomotives 421-6?
SQL: SELECT "Date" FROM "2-1169552-16" WHERE "Loco Nos." = '421-6';

Question: How many were built with a locomotive number of 11-20?
SQL: SELECT "No. built" FROM "2-1169552-16" WHERE "Loco Nos." = '11-20';

Question: On what date were more than 5 built with 4-4-2 wheels?
SQL: SELECT "Date" FROM "2-1169552-16" WHERE "Wheels" = '4-4-2' AND "No. built" > 5.0;

Question: On what date were less than 10 built with a locomotive number of 31-35?
SQL: SELECT "Date" FROM "2-1169552-16" WHERE "No. built" < 10.0 AND "Loco Nos." = '31-35';