AG Mechanics CDE Practice Exam

Which of the following types of engines have valves and springs that are capable of being removed with your hands without the use of tools?

1. 2-stroke engine

2. OHV engine

3. Rotary engine

4. Diesel engine

The correct answer is: OHV engine

OHV stands for Overhead Valve engines, where the valves and springs are located in the cylinder head above the combustion chamber. The design of OHV engines allows for easy removal of valves and springs by hand without the need for tools. This design feature makes maintenance and repairs more convenient for mechanics compared to other engine types. In contrast: - 2-stroke engines do not typically have valves and springs - Rotary engines have a unique design with a rotating triangle-shaped rotor, so they do not have traditional valves and springs - Diesel engines, while they may have valves and springs, usually require tools for removal due to their design and complexity.