How phonemes in the word strap?

* s /s/

* t /t/

* r /r/

* æ /æ/ (as in "cat")

Let's break it down:

* s is a voiceless alveolar fricative.

* t is a voiceless alveolar stop.

* r is a voiced alveolar approximant.

* æ is a front vowel, similar to the "a" in "cat".