Technician A says that the current flow through a rear-window defogger can be often self-regulating. Technician B says that as the temperature of the grid decreases, its resistance decreases, reducing current flow. Who is right?

A) Technician A only B) Technician B only C) Both technicians D) Neither technician


A

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a. cation exchange capacity b. base saturation and pH c. active and reserve acidity d. purity and fineness

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Hot Surface Ignition System (HSI) controls lockout after how many unsuccessful attempts?

A) Two attempts B) One attempt C) Three or more attempts D) The controls do not lock out.

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How does an energy-recovery wheel improve system efficiency?

A) By keeping the evaporator clean B) By moving some of the system refrigerant with a turbulator C) By reducing the condenser head pressure D) By transferring heat between the ventilation air and the exhaust air

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