Two Technicians Are Discussing VGT's (Variable-Geometry Turbochargers') Variable-Nozzle Opening

question 9

Multiple Choice

Two technicians are discussing VGT's (variable-geometry turbochargers') variable-nozzle opening. Technician A says when less exhaust gas flow takes place across the turbine, the turbine speed drops because exhaust backpressure increases. Technician B says that by varying the width of the nozzle opening with an actuator, the turbine speed power is adjusted to provide just enough energy to drive the compressor wheel at the desired boost level for any engine speed and load condition. Who is right?

• A)A only"
• B)B only"
• C)Both A and B
• D)Neither A nor B"

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Definitions:

Horizontal Growth

Expansion or growth of an entity (such as a company or plant) outward rather than upward, which can involve increasing product lines or locations.

Radial Growth

The pattern of growth that expands outward in all directions, commonly observed in fungi, certain plants, and some animals like jellyfish.

Cork Cambium

A lateral meristem that produces cork cells and cork parenchyma; cork cambium and the tissues it produces make up the periderm (outer bark) of a woody plant. Compare with vascular cambium.

Secondary Xylem

The part of a plant that contributes to wood formation, resulting from the division of cambium cells and providing structural support and water transport.