On using Sysinternal's Strings on UsoClient.exe, I found that there are more switches which can be used -

/StartScan Used To Start Scan
/StartDownload Used to Start Download of Patches
/StartInstall Used to Install Downloaded Patches
/RefreshSettings Refresh Settings if any changes were made
/StartInteractiveScan May ask for user input and/or open dialogues to show progress or report errors
/RestartDevice Restart device to finish installation of updates
/ScanInstallWait Combined Scan Download Install
/ResumeUpdate Resume Update Installation On Boot