Question

a rotary engine:

○ a. is not considered to be an internal combustion engine.
○ b. has four working chambers to create combustion.
○ c. uses oval shaped pistons.
○ d. can be made with one or more rotor housings.

Explanation:

A rotary engine is an internal - combustion engine. It doesn't have four working chambers like a traditional piston - engine for combustion and doesn't use oval - shaped pistons. It can be made with one or more rotor housings.

Answer:

d. Can be made with one or more rotor housings