The device shown in the illustration is a/an...

🔍 Key Concepts

• Function of stuffing boxes on crosshead diesel engines and where they are located relative to the piston rod/crankcase • Visual features of a vane type steering gear (hydraulic vanes in a circular housing) versus seal arrangements on a shaft or rod • How scraper rings and sealing rings are arranged in multiple stacked segments to keep oil and gases separated between crankcase and scavenge space

💭 Think About

• Look at the central vertical member in the illustration: what kind of part could that be on a large slow‑speed diesel engine? A rudder stock, a shaft, or a piston rod? • Notice the many stacked rings and the bolted housing around the rod. What is the purpose of having multiple rings in series—supporting weight, transmitting torque, or sealing and scraping fluids? • Ask yourself which option would most likely require a complex, multi‑ring sealing arrangement between two spaces with different oils or gases.

✅ Before You Answer

• Identify whether the device is primarily for sealing and scraping along a reciprocating rod, or for transmitting rotary motion to a rudder or shaft. • Check if a vane type steering gear would normally show radial vanes within a circular chamber rather than stacked rings along a straight bore. • Confirm which listed component (motor mount, steering gear, stuffing box, mechanical shaft seal) would be built with multiple segmented rings and gland followers as seen in the cutaway.

The device shown in the illustration is a/an __________. Illustration GS-0116

diesel engine motor mount

vane type steering gear

oil scraper ring stuffing box for a crosshead engine

mechanical shaft seal

🔍 Key Concepts

💭 Think About

✅ Before You Answer