Question

electric cooling fans are typically commanded on and off by the ______.
○ powertrain control module (pcm)
○ radiator pressure sensor (rps)
○ thermostat
○ cooling system delta sensor
question 13
which one of these areas is the water jacker?
image of an engine component with labels a, b, c, d and a coolant legend
○ a
○ b
○ c
○ d

Explanation:

First Question (Electric Cooling Fans):

The Powertrain Control Module (PCM) manages engine - related systems, including commanding electric cooling fans on/off. A radiator pressure sensor (RPS) measures pressure, a thermostat controls coolant flow through the engine (not fan operation), and a cooling system delta sensor isn't the main controller for fan operation.

The water jacket in an engine is the area (usually around the cylinders) that carries coolant to cool the engine. In the diagram, area B (around the piston/cylinder area, associated with coolant as per the "COOLANT" legend) is the water jacket. Area A is likely the combustion chamber or related, and C/D are likely other engine components (like ports or supports) not the water jacket.

Answer:

A. Powertrain control module (PCM)

Question 13 (Water Jacket):