OCTCO/OCTF Exit Exam • Set 7 Question 25 of 30

____ is considered as best material for IG blower impellers?

✓

Direct Answer

Option D: Aluminum

Inert gas blower impellers are typically manufactured from aluminum alloys or non-ferrous materials to prevent mechanical frictional sparking in case of casing contact.

All Options

Chromium

Steel

Titanium

Aluminum (Correct Answer)

Detailed Explanation & Context

Inert gas blower impellers are typically manufactured from aluminum alloys or non-ferrous materials to prevent mechanical frictional sparking in case of casing contact.

Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Oil and Chemical Tanker Cargo Operations (OCTCO/OCTF).

Practice Full OCTCO/OCTF Set 7

Test yourself with 30 interactive questions, live timer, and instant score.

Launch Practice Simulator →

Question Discussion & Notes

Have a doubt, memory trick, or exam update? Share your insights with fellow mariners.

Loading mariner discussions...

« Previous Question Next Question »

More Questions in OCTCO/OCTF Set 7

View All 30 →

Q1 How much volume of air needs to be changed in pump room? Q2 Fixed foam monitors having a operating capacity_____L/min? Q3 In tankers, the central equipment is available either for installation in _____locations. Q4 The physical data of a liquid chemical can be found on_____? Q5 Gas testing onboard tankers can be carried out with the following equipment onboard? Q6 What % of air is made up by oxygen? Q7 Does the muster list and the emergency instruction contain information relevant only to the deck officers? Q8 COW operation is conducted during? Q9 Before cargo operations start the master should establish liaison between the ship and______? Q10 If at sea the inert gas low pressure alarm is activated it may be necessary to conduct____?