WCS 2101-2 - Knowledge Assessment

Which of the following statements below about air intake filtration is/are correct?

• Air movement into engine occurs due to vacuum created in vacuum pump

• Air filter and cleaner remove contaminants

• Air filter silence intake noise

• The ideal air-fuel ratio is 14.1:7

• Dirt in air cannot reach engine

State the name of the component shown in the diagram.

Which of the following statements below about turbocharger is/are correct?

• Increase engine power and torque

• Turbine wheel spins by exhaust gas

• Compressor wheel spins by exhaust gas

• Turbine wheel spins compressor wheel to pump air into the intake system

• Compressor wheel spins turbine wheel to pump air into the intake system

What is the function of a charge air cooler?

• Cools exhaust gas

• Cools intake air

• Cools compressed air

• Cools turbine wheel

• Cools compressor wheel

What does "VGT" stand for?

Which of the following statements below about VGT is/are correct?

• Boost control by adjustable vanes

• Boost control by wastegate

• Vane position control by unison

• Wastegate position control by actuator

What does "EGR" stand for?

What does "NO_x" stand for?

What does "DOC" stand for?

What does "CO" stand for?