While taking any test it is important to maintain and manage time. Each and every second in the real exam counts and unless you manage time efficiently and effectively, you won't be able to finish the paper on time.
As such, we do not have any time limit to answer questions in our practice and test.
However, we do have an ideal time assigned for each question. The system compares the time you take for solving a question with the ideal time and gives you a feedback.
So, you can take as long as you want to solve a question and later on you will get a feedback about your speed. This in turn, will help you improve your time management skills.
In depth: Read about Score and Time Analysis here.
Also, while practicing on Embibe, you can keep track of how much time you are spending on each question and learn how to control it.