Good Luck Student

during an examination one of student ask me,
"miss, do you know what means PEL, saya cuma ingat L for limit.
"sory boy, i dont know nothing about Oil and Gas term."

so aku pun nak tahu gak, apa ayat penuh PEL tu, aku pusing semua table student, secara rawak yg jawab;
1. permanent exposure limit
2. permanent exposure level

aku google, google bagi jawapan
PERMISSIBLE EXPOSURE LIMIT (PEL OR OSHA PEL)

p/s: haha apa kes, jawapan ada lam google nih.. agaga