The only way you can fail the MAKAUT practical exam is if you fail to appear on the exam. Some MAKAUT colleges have strict policies regarding practicals prohibiting students from even taking their mobile phones inside the laboratory. You will not be allowed to talk to your mates during the practicals. Such colleges having strict rules might even fail the students who are not able to do the practical alone and perform poorly.
However, in most cases, it's almost impossible to fail the MAKAUT practical exam unless you have a strong reason to do so.