I have an assignment to write about personality traits that make an individual suitable for a particular job.
Answer
You might want to look at this website: http://www.personalitytest.net/index.html , which contains short and long versions of a questionnaire based on the Five-Factor Personality Inventory by Costa and McCrae. You may also want to look at Open Psychometrics. You will find several different personality tests here that you may use for free.
Also, to find information on the topic of personality traits and job suitability you might try this:
1) Go to http://www.uhd.edu/library/
2) Chooses the Databases tab
4) Choose one of these databases from the alphabetical list:
Business Source Complete
PsychInfo
5) Try using the following search terms in any combination:
Personality Traits
Personnel Selection
Employment Test
Personality Assessment
Employee Selection
Employee Screening