Police practice test take this free practice test to see what types of questions you may face on a police officer entrance exam many police departments and law enforcement agencies use the national police officer selection test post which focuses primarily on math reading comprehension grammar and writing skills grade answers as you go. The police polygraph exam establishes whether you are being deceptive police written test examines your critical thinking and comprehension skills the fitness exam tests your strength versatility and cardiovascular ability the oral board exam tests your suitability to the role of a police officer. Police practice test take this free practice test to see what types of questions you may face on a police officer entrance exam many police departments and law enforcement agencies use the national police officer selection test post which focuses primarily on math reading comprehension grammar and writing skills. The national police officer selection test or npost is one of the most common written assessments that police departments use during the hiring process it was created by testing company stanard associates inc and is an entry level test agencies use the npost at the municipal state and federal levels