FCC certification for nrf24l01+

Is nrf24l01+ from Nordic Semiconductors FCC certified ? It is hard to find out from their datasheet whether FCC approved ?
Is it FCC approved ?

If it is approved and I use it in my PCB and control it via my ARM cortex processor, do I need to get the entire PCB board FCC approved ?

Also, I am using sierrra wireless HL series modem chip which is FCC approved. This will also be on my PCB. So, do I have to get my PCB FCC approved again although my modem is FCC approved ?

FCC License for nRF24L01+: https://forum.sparkfun.com/viewtopic.php?f=13&t=24255

http://www.semiconductorstore.com/ca...dproduct=41939

So, the chip is not FCC certified, right ? I could not see any mention about FCC on their datasheet

Yes, FCC approval is required for a product, not a chip. It involves conformance with general EMC regulations and specific radio standards.

So, that means that even if I use FCC approved chips in my product, I still have to get the whole product FCC approved to sell it in USA ?

I think chip is not FCC approved, because power output can be higher than FCC allows (controlled by registers).
Maybe you can find something on this page about FCC and CE approval, use google translate or something:
http://www.51hei.com/mcu/1892.html
you can see they mention 0dBm and this for some reason:
Bank0_REG6[2:1]=2
Bank0_REG0[0]=0
regarding FCC and CE..

Yes, correct. By definition, there are no "FCC approved chips". Your PCB including the antenna must be certified. And if you change the PCB, it has to be certified again.