Which of these uses a movable core to act as an electric switch?

A) Solenoid
B) Transistor
C) Relay
D) None of these


A

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Combining pure oxygen with a burning material causes a fire to _____.

a. flare and burn out of control b. extinguish c. die down and then flare up d. burn more slowly

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When removing the rubber plugs from a line set, the hiss indicates that the tubing is not leaking.

Answer the following statement true (T) or false (F)

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A high O2S voltage could be caused by ________.

A) A rich exhaust B) A lean exhaust C) A defective spark plug wire D) Both A and C

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Which instruction checks the value of program data often tied to sensors, registers, and other places where data are stored in the controller?

A. Input B. Looping C. Output D. Call

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