(a) An eligible who is so defective in sight, speech, or hearing,
  or who is otherwise so defective physically as to be apparently unfit to
  perform the duties of the position to which he is seeking appointment.

(b) An eligible who has made a false statement in his application, or been guilty of fraud or deceit in any matter connected with his application or examination, or who has been guilty of a crime or of infamous or notoriously disgraceful conduct.

3.  If an appointing or nominating officer to whom certification has been made shall object in writing to any eligible named in the certificate, stating that because of physical incapacity or for other good cause particularly specified such eligible is not capable of properly performing the duties of the vacant place, the Commission may, upon investigation and ascertainment of the fact that the objection made is good and well founded, direct the certification of another eligible in place of the one to whom objection has been made.

  GENERAL RULE V.

Executive officers shall in all proper ways facilitate civil-service examinations; and customs officers, postmasters, and custodians of public buildings at places where such examinations are to be held shall for the purposes of such examinations permit and arrange for the use of suitable rooms under their charge, and for heating, lighting, and furnishing the same.

  GENERAL RULE VI.

No person dismissed for misconduct, and no probationer who has failed to receive absolute appointment or employment, shall be admitted to any examination within one year after having been thus discharged from the service.

  GENERAL RULE VII.

1.  Persons who have a prima facie claim of preference for appointments to civil offices under section 1754, Revised Statutes, shall be preferred in certifications made under the authority of the Commission to any appointing or nominating officer.

2.  In making any reduction of force in any branch of the classified civil service those persons shall be retained who, being equally qualified, have been honorably discharged from the military or naval service of the United States, and also the widows and orphans of deceased soldiers and sailors.

  GENERAL RULE VIII.

  The Commission shall have authority to prescribe regulations under and
  in accordance with these general rules and the rules relating specially
  to each of the several branches of the classified service.

  DEPARTMENTAL RULES.

  DEPARTMENTAL RULE I.