“Emotional intelligence (EI) is the capability of individuals to recognize their own, and other people's emotions and to manage and/or adjust emotions to adapt environments or achieve one's goals.” That's how the Wikipedia describes “Emotional Intelligence”.
A person with good emotional intelligence can gauge the difference between fear and surprise by looking at people's facial expressions. Understanding body language plays a key role in making or breaking a deal. Facial expressions being an integral part of body language, knowing them makes you a key player. Emotionally intelligent persons very effectively manage people.
Knowing if you are good at emotional intelligence is as easy as answering a few questions, yes you are reading it right! The University of California, Berkeley's Greater Good Science Center has developed a quiz to test your ability to recognize the human facial expressions and your emotional intelligence.
Don't worry if you score less in the test, the test is not a comprehensive indicator of your overall emotional intelligence. Self-awareness, emotional control & regulations, social belongingness, and social skills too play a vital role in shaping you as an emotionally intelligent individual.