Challenges for cause may be taken on one or more of the following grounds:

1. 1. A want of any of the qualifications prescribed by law to render a person competent as a juror;

2. 2. Consanguinity or affinity within the fourth degree to either party;

3. 3. Standing in the relation of guardian and ward, master and servant, debtor and creditor, employer and employee, attorney and client, or principal and agent to either party, or being a member of the family of either party, or being a partner in business with either party, or surety on any bond or obligation for either party;

4. 4. Having served as a juror or been a witness on a previous trial between the same parties for the same claim for relief;

5. 5. Interest on the part of the juror in the event of the action, or in the main question involved in the action, except the juror's interest as a member or citizen of a municipal corporation;

6. 6. Having an unqualified opinion or belief as to the merits of the action founded upon knowledge of its material facts or some of them;

7. 7. The existence of a state of mind in the juror evincing enmity against or bias for or against either party; or

8. 8. That the juror does not understand the English language as used in the courts.