DSL-201 CH2 SHORT REVIEW

What is the primary function of an engine?

• To produce energy without combustion

• To convert heat energy from burning fuel into mechanical power

• To synchronize the valve timing with the crankshaft

• To diagnose unusual sounds or operating conditions

Which type of engines are most commonly used in commercial vehicles?

• Rotary engines

• Reciprocating engines

• Turboprop engines

• Jet engines

What does the valve train mechanism consist of?

• Pistons and cylinders

• Gears, chains, or belts

• Fuel injectors and pumps

• Cooling fans and radiators

What is the function of the valve train mechanism?

• To convert heat energy into mechanical power

• To synchronize the valve timing with the crankshaft

• To increase the compression ratio

• To diagnose unusual sounds or operating conditions

What is a characteristic of OPEs (Opposed Piston Engines)?

• They use a single piston in a single cylinder

• They use two pistons in a single cylinder that share a common combustion event

• They use multiple pistons in multiple cylinders

• They do not use combustion to produce energy

What happens as compression ratios increase in an engine?

• Fuel consumption increases and power decreases

• Fuel consumption decreases and power increases

• Fuel consumption and power both decrease

• Fuel consumption and power both increase

What are the four strokes of the Otto operating cycle?

• Intake, compression, power, and exhaust

• Intake, compression, power, and cooling

• Intake, compression, power, and ignition

• Intake, compression, power, and fuel injection

What is the purpose of valve overlap in an engine?

• To increase the compression ratio

• To help cool the piston crown and exhaust valves

• To synchronize the valve timing with the crankshaft

• To convert heat energy into mechanical power

Tags

CCSS.RI.11-12.4

Who invented the Miller cycle?

• Henry Ford

• Nikola Tesla

• Ralph Miller

• Thomas Edison

What is a unique feature of the two-stroke engine compared to the four-stroke engine?

• It completes all the same combustion cycle events but with only two strokes of the piston

• It uses no combustion to produce energy

• It has a longer valve overlap period

• It uses multiple pistons in multiple cylinders