you will be asked about your past experience, you need to be knowledgable about rotary equipment operation, maintenance, and troubleshooting. you will also be asked about other rotating equipment. for example, you will be asked about different kinds of pumps, also different kinds of compressors, you will also be asked about different kinds of steam and gas turbines. you should be knowing how they operate and maintained and repaired. you need to have a degree in engineering. you have to be mobilised anywhere anytime
