For the present case Vibration assessment carried on rotating equipment and their supporting structures. Vibration response tests were conducted at normal operating speeds of the motor with different combinations of Lobe compressors, pumps and blowers. Vibration data have been measured and recorded using a multi-channel data acquisition system on both DE and NDE side. Natural frequency response tests were made on machine base concrete structure. The overall intent of these tests is to determine the existing severity levels of vibrations and to suggest possible remedial plans if required.