The astern guarding valve on main propulsion...

Question 1 / 270705eccefa1bacbc34ba4d472c6

Question 1 of 270705eccefa1bacbc34ba4d472c6

The astern guarding valve on main propulsion steam turbine units must be open when a vessel is __________.

Question 1 of 27070

The astern guarding valve on main propulsion steam turbine units must be open when a vessel is __________.

🔍 Key Concepts

• Role of the astern guarding valve in a main propulsion steam turbine system • Difference between steady sea operations and close-quarters maneuvering • When rapid reversal of thrust (going astern quickly) might be critical for safety

💭 Think About

• In which situation would the engineer most likely need to quickly apply astern steam to the turbine for emergency stopping or backing? • When is the ship most at risk of collision or allision, requiring immediate engine response rather than maximum efficiency? • Which operations involve frequent speed and direction changes, rather than long periods of steady ahead power?

✅ Before You Answer

• Identify which answer choice describes close-quarters ship handling rather than open-ocean running or cargo operations • Consider during which operation the bridge might call for “full astern” on short notice • Eliminate any choices where astern power would clearly not be needed instantly or is unrelated to propulsion (like cargo handling only)

Question 1 of 27070

The astern guarding valve on main propulsion steam turbine units must be open when a vessel is __________.

at full sea speed

maneuvering into port

running with a warm bearing

loading cargo