Question

the three phases of abs operation are pressure ______.
○ release, hold, reverse
○ release, hold, insulate
○ hold, release, increase
○ hold, clamp, revise

question 9
which antilock component creates current frequencies that change with wheel rotational speed?
○ electronic control unit
○ safety circuitry
○ modulator assembly
○ wheel speed sensors

question 10
what causes the abs control module to switch from a \stand - by\ mode to an active mode?
○ wheel deceleration, as sensed by the wheel speed sensor(s)
○ vehicle speed sensor
○ sudden application of the brakes
○ brake pedal switch

Explanation:

Question (about ABS operation phases):

The three phases of ABS (Anti - lock Braking System) operation are pressure hold, release, and increase. The other options have incorrect terms. "Release, hold, reverse" has an incorrect third term, "Release, hold, insulate" has an incorrect third term, and "Hold, clamp, revise" has incorrect second and third terms.

Wheel speed sensors in an antilock braking system are the components that create current frequencies which change with the wheel's rotational speed. The electronic control unit processes signals, safety circuitry is for safety - related electrical functions, and the modulator assembly controls brake pressure, not generate speed - related current frequencies.

Wheel deceleration, as sensed by the wheel speed sensors, causes the ABS control module to switch from "stand - by" mode to active mode. The vehicle speed sensor just measures vehicle speed, sudden brake application is not the direct trigger for mode switching, and the brake pedal switch mainly indicates brake pedal position, not the trigger for ABS mode change.

Answer:

Hold, release, increase

Question 9: