🔍 Key Concepts

• Trace the piping connected to the device labeled 1 and note which system it ties into (jacket water, lube oil, air, or exhaust). • Think about what happens to cooling water in an engine as temperature increases and where that extra volume must go. • Compare the location of device 1 with typical positions of relief valves, air coolers, and exhaust manifolds in engine system schematics.

💭 Think About

• Which fluid seems to flow to and from the area of device 1: cooling water, lube oil, air, or exhaust gas? How can you tell from the symbols and connections? • If the engine gets hotter and the volume of cooling water increases, what kind of component would be mounted high in the system and open to a vent or overflow line? • Look at options that mention air coolers, lube oil coolers, exhaust manifolds, and jacket water. Which of these systems is actually connected to the part of the drawing where 1 is located?

✅ Before You Answer

• Verify which system (cooling water, lube oil, air, exhaust) the lines around device 1 belong to, based on surrounding components and flow arrows. • Check whether device 1 is shown with any pressure-relief symbol or is simply a tank/space at the top of the cooling circuit. • Confirm that only one choice matches both the location (high point of the system) and the function (handling volume changes or pressure protection) indicated by the drawing.