Civil engineers also often manage several projects at the same time, and thus must be able to balance time needs and to effectively allocate resources. Problem-solving skills. Civil engineers work at the highest level of the planning, design, construction, and operation of multifaceted projects or research.
You can retake the GMAT up to 5 times in any 12-month period, but no more than once in any 16-day period. You can request to GMAC in writing if you want to take it more than that, but applications are only considered after you have actually taken the 5th test.
So, take two separate free practice tests for both the GRE and the GMAT on two separate days, without any preparation, with the same test conditions, and preferably at the same time. This will help you get a hang of both the test formats, and will help you decide which one you like better.