To check the web load balancer, you can simply create two different web pages with the same filename on two servers.
Server 1: index.html
<html><h1>This is server 1</h1></html>
Server 2: index.html
<html><h1>This is server 2</h1></html>
Then you browse the webpage with the DNS name that load balancer provided. When you see "This is server 1", you are connecting to server 1, vice versa.