Plain version: think of the Insurance Code as a filing cabinet with labeled drawers. Section 100 divides insurance into classes, and Sections 101 through 120 define what goes in each drawer.
The classes listed in §100 include fire, marine, surety, liability, plate glass, sprinkler, and boiler and machinery, among others. Casualty is not on the list, even though it is a common industry term. The narrow-sounding classes, such as plate glass and sprinkler, are the ones candidates tend to doubt, but they are all in the statute.
Definitions that show up on the exam:
Sprinkler (§114): water damage from sprinklers and other fire-extinguishing equipment, and also loss from the breakage or leakage of water pipes.
Marine (§103): navigation, transit, and transportation risks. It is not a catch-all for water losses.
Title (§104): loss from liens or encumbrances on, or defects in, the title to property.
Boiler and machinery (§111): for example, damage from the explosion of a pressure vessel.
Workers' compensation (§109): employees' injuries at work.
Watch the overlaps:
Surety (§105) does not include a default on a loan secured by a mortgage on real estate. That belongs to mortgage guaranty (§119).
Miscellaneous (§120) is the catch-all for any proper subject of insurance not included in the other classes. An open policy that pays a theater producer's loss if a show is cancelled because the lead performer is injured falls here. Disability (§106) is tempting because a person is hurt, but the policy pays the producer's business loss, not benefits for an insured's own injury.