Can I use MySQL-SERVER tunning variables in MYSQL CLUSTER? When tunning MySQL-SERVER for best performance, the edition is done down my.cnf file. 

Such as:

max_connections = 500
wait_timeout = 600
sort_buffer_size = 2M


Can I improve MySQL CLUSTER performance with those editable variables down [mysqld] tag of config.ini of mgmt node or my.cnf of ndbd node? 

The main reason of this question is that I'm getting ERROR 1205: Lock wait timeout exceeded; try restarting transaction when importing a 1.2 G .sql file. I can't find any solution to this refering to MySQL CLUSTER so I want to try with the wait_timeoutvariable, but I don know if it's compatible with.

Will it accept those variables?
Yes, all this tuning variables are described in MySQL Documentation