If the commissioner shall find good cause to believe that the holder of a certificate of competence is incompetent or untrustworthy as a boiler inspector, or has willfully made a false statement of a material fact in an application or a report, he may by order enjoin the certificate holder from further action as a boiler inspector pending a hearing. The order shall provide for a hearing before the commissioner's representative at a reasonable time and place and a copy thereof shall be served personally or by mail on the inspector and such others as the commissioner may deem interested. Upon the evidence produced at the hearing the commissioner shall order the injunction terminated or the certificate suspended or revoked.