Which of the following is NOT a typical use for a two-cycle engine? * 1 point Chainsaw Lawn mower Leaf blower Pole pruner In a four-cycle engine, what is the correct order of strokes? * 1 point Intake, compression, power, exhaust Compression, power, exhaust, intake Power, exhaust, intake, compression Exhaust, intake, compression, power What is the purpose of mixing oil with gasoline in a two-cycle engine? * 1 point To increase fuel efficiency To reduce emissions To provide necessary lubrication To improve cold-start performance

**1. Which of the following is NOT a typical use for a two-cycle engine?** - Two-cycle engines are often used in equipment that demands a high power-to-weight ratio. - They are generally found in handheld, portable tools. - Common applications include chainsaws, leaf blowers, and pole pruners. - Lawn mowers, however, typically use four-cycle engines for their smoother operation and lower emissions. **Answer: Lawn mower** --- **2. In a four-cycle engine, what is the correct order of strokes?** - A four-cycle engine operates through four distinct strokes in the following order: 1. **Intake Stroke:** The engine draws in the air-fuel mixture. 2. **Compression Stroke:** The mixture is compressed. 3. **Power Stroke:** The compressed mixture is ignited, producing power. 4. **Exhaust Stroke:** The burnt gases are expelled. - This sequence can be denoted as: \[ \text{Intake} \rightarrow \text{Compression} \rightarrow \text{Power} \rightarrow \text{Exhaust} \] **Answer: Intake, compression, power, exhaust** --- **3. What is the purpose of mixing oil with gasoline in a two-cycle engine?** - Two-cycle engines do not have a separate lubrication system. - The oil mixed with gasoline provides the essential lubrication that reduces wear between the engine's moving parts. - Without proper lubrication, the engine components could overheat and wear prematurely. **Answer: To provide necessary lubrication**