Generally, companies conduct three types of written tests:

Aptitude Tests,

Technical Tests

Psychometric tests.

A company can conduct combination of any of these tests.

Aptitude Tests:

Vocabulary and Reading skills, Basic math, analytical, problem-solving skills

Technical Tests;

To test the strength of Basic grounding (engg,mech,civil)technical tests conducted

Psychometric tests:

Just answer these questions honestly ,it is not considered for rejection.