Effect
if the level of chakra is big you will be able to hear and see it but for the most time you wont. chakra is an energy in your body in this case it cannot be seen but in ceertain situations where combat is intended you could do a jutsu that requires massive amounts of chakra/energy to be used and if you were to channel most of that chakra into a rasengan: massive energy ball. you could eventually hear the chakra in physical form. and if you had enough chakra/energy in your reserves/like a reserve on a gas tank when its empty. you could restore your chakra to an certain amount and use it to flee or finish the combat scenario.
Limits
my limits of chakra usage are three chidoris: massive energy ball that you can see the chakra and hear it/sounds like tweeting birds.
Repercussions
if damages chakra points throught the body