Variable Intake Manifolds for Engines with Port Fuel Injection Are

question 44

Multiple Choice

Variable intake manifolds for engines with port fuel injection are being discussed. Technician A says at low speeds, the air travels through a short or large diameter runner. Technician B says they deliver more power at high speed. Who is correct?

• A)A only
• B)B only
• C)both A and B
• D)neither A nor B

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Definitions:

Sarcolemma

The thin, plasma membrane that surrounds the cytoplasm of muscle cells, critical in muscle contraction.

Graded Fashion

A term referring to a response that varies in degree or intensity, rather than being an all-or-nothing reaction.

Motor Units Recruited

The activation of a set of motor neurons and their associated muscle fibers, used to generate an appropriate level of force during muscular contraction.

Multiple Wave Summation

A phenomenon where muscle fiber contractions increase in strength due to rapid, repeated stimulation before full relaxation occurs.