(a) To inspect, during reasonable hours, and as often as practicable, every room, building, or place within this Commonwealth where and when any labor is being performed, which is affected by the provisions of any law of this Commonwealth, and all buildings in which public assemblies are held, and for this purpose to enter any such room, building or place;

(b) To receive and examine plans for all buildings more than two stories high, and all places of assembly outside of cities of the first and second classes, and second class A, and to approve the same, as may now or hereafter be provided by law;

(c) To receive and check plans for elevator installations outside of cities of the first and second classes, and to issue permits for the erection and repair of elevators, as may now or hereafter be provided by law;

(d) To file reports of inspection of elevators, received from inspectors employed by the department, or from inspectors holding certificates of competency issued by the department;

(e) To inspect boilers, and to receive and check reports of inspection of boilers, made by inspectors holding certificates of competency issued by the department;

(f) To issue licenses, after examination, to motion picture projectionists and apprentices, as may now or hereafter be provided by law;

(g) To receive reports of industrial accidents to persons, and to direct the investigation of such accidents, and prescribe means for the prevention of similar accidents;

(h) To issue orders for removing or safe-guarding against hazards that may cause accidents to employes, as may now or hereafter be provided by law.

(i) To annually inspect emergency lighting systems, sprinkler systems, and fire alarm systems, in all buildings owned or operated by the Commonwealth, and to report the respective operating conditions thereof to the departments of the Commonwealth having jurisdiction of the buildings.