Engine Diagnostics and Components

What is the primary purpose of a compression test in engine diagnostics?

• Measure fuel efficiency

• Evaluate exhaust emissions

• Assess cylinder pressure

• Monitor coolant temperature

Which component in an internal combustion engine is responsible for opening and closing the intake and exhaust valves?

• Piston

• Crankshaft

• Camshaft

• Connecting rod

What does the term "bore" refer to in engine specifications?

• Engine displacement

• Cylinder diameter

• Stroke length

• Piston size

Which of the following engine components is responsible for converting reciprocating motion into rotational motion?

• Piston

• Crankshaft

• Camshaft

• Connecting rod

What is the purpose of a dynamometer in engine testing?

• Measure fuel efficiency

• Assess horsepower and torque

• Check oil pressure

• Monitor exhaust emissions

In an overhead camshaft (OHC) engine, where are the camshafts located?

• Above the cylinder head

• Below the crankshaft

• Inside the oil pan

• Attached to the transmission

Which type of engine relies on a combination of an internal combustion engine and an electric motor for propulsion?

• Hybrid engine

• Rotary engine

• Two-stroke engine

• Diesel engine

What is the purpose of the PCV (Positive Crankcase Ventilation) system in an engine?

• Regulate fuel injection

• Control exhaust emissions

• Ventilate and reduce crankcase pressure

• Monitor coolant temperature

Which term refers to the maximum distance the piston travels from top dead center to bottom dead center within a cylinder?

• Bore

• Stroke

• Compression ratio

• Displacement

What is the purpose of an engine's thermostat?

• Regulate oil pressure

• Control air/fuel mixture

• Manage coolant temperature

• Adjust valve timing