A mechanical engineer is mainly involved in the design, development and manufacture engines, ships, air-conditioning and refrigeration systems, building services and manufacturing processes.The discipline involves the application of science for the analysis, design, manufacturing, and maintenance of mechanical systems. ( source, https://www.jkuat.ac.ke/undergraduate-courses/bsc-mechanical-engineering/)
For you to pursue a mechanical engineering course at JKUAT and most of the universities
the admission requirements are
KCSE Mean grade B- (minus) and mean grade for the total score in the four JAB cluster subjects of at lest B (plain) and the following minimum grades in the individual luster subjects: Mathematics C+, Physics C+, Chemistry C+, Geography or Biology, or group III or any group IV.