In general NO, you should not be silent.
At the moment I am in a similar position(or used to be..), as I am just about to finish my internship. At the start I wasn't too sure how to handle lots of things, I was shy to ask when I encountered a problem and this resulted quite some issues, mainly with performance.
There were talks with my manager regarding my performance and why it was stalling. I explained to him what my issues were and got some advice from him. Since then, to be honest, things are going only the right way. When I have a problem I try to fix it by my own(which you should always try to do, at the end of the day you are there to learn!), but if this starts to take too much time I stand up for it and speak to someone. Asking questions is not a bad thing, provided that you did try to solve it yourself first.
Obviously, when you're stuck you need help, regardless who you get it from. The guys which are already experienced in the product are the best place to turn for help.
As to the other benefits of not staying silent: this way you can form friendships, get help easier over time, satisfy your positions requirements, learn a lot about things which are not entirely focused on the thing you are doing at the moment(internal meetings, negotiations, other general stuff which applies to most jobs)
I suppose from time to time you will get a chance to go out with your co-workers just to socialise - going for a drink, bowling game or whatever - this is a great opportunity to get to know them! Do not miss it!
If you ever have some issues with the workplace working conditions - never stay silent about them, mention them in the first possible moment, so that actions can be taken. This will only make you feel more comfortable in the long run and nobody will think bad of you. After all you are a human being.
Not to forget - for not contacting with other fellow co-workers you risk getting lower grades on your communication skills, or even on your performance skills. You might not hear about this at all, but you can be sure that your manager is watching you closely.