Maya LT ships with two samples files to help you experiment with the utility nodes for rigging. The sample files include a simple arm rig, one set up with utility nodes, and one without the nodes so you can try adding them yourself.
You can load the file Utility_Nodes_Example_Start.mlt from ../Program Files/Autodesk/MayaLT<version>/presets/feature/examples/UtilityNodes/.
The scene contains a simple arm rig.
The following video shows the simple arm rig being set up with utility nodes to control joint rotation down the chain.
To play with the completed arm rig setup shown in this video, load the Utility_Nodes_Example_Finish.mlt file.