Setting queue for spark job on yarn

[Ron Gonzalez]

Hi,
  How does one submit a spark job to yarn and specify a queue?
  The code that successfully submits to yarn is:

   val conf = new SparkConf()
   val sc = new SparkContext("yarn-client", "Simple App", conf)

   Where do I need to specify the queue?

  Thanks in advance for any help on this...

Thanks,
Ron