Tests on Embibe are conducted in the exact way actual exams are conducted. Since there is no option to pause the actual exam, Embibe doesn't allow students to pause their tests in between.
If you do not want to give a full test in one sitting, you can take a part test.
But students must get used to sitting for long hours without getting distracted or exhausted. This also affects time management and is a key factor for your success in competitive exams.