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icedcappucino started the topic Power Factor in the forum Electrotech 3 years, 3 months ago
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icedcappucino started the topic Thermostatic Expansion Valve in the forum Air/Con & Refrigeration 3 years, 4 months ago
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icedcappucino started the topic Boiler caustic embrittlement in the forum Boilers 3 years, 4 months ago
Definition of “boiler caustic embrittlement”:
Phenomenon that takes place in boiler when caustic substances gather in materials of the boiler, especially highly stressed regions such as cracks, tube and tube plate connection, joints, bends, and rivets.Definition of “caustic”: Strong corrosive alkaline
Chemical formula:
NA2CO3 = Sodium…[Read more]
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icedcappucino started the topic Boiler accumulation pressure test in the forum Boilers 3 years, 4 months ago
Definition:
To test boiler steam pressure does not exceed 10% above WP. In other words, to test that the boiler safety valves are appropriate for the boiler, does it release steam fast enough to prevent steam pressure exceeding 10% above WP.
*Boiler safety valves are set at 3% above WP.So how come it’s possible for boiler steam pressure to…[Read more]
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icedcappucino replied to the topic How to answer questions in the forum General tips for all 3 years, 4 months ago
More advice from others:
1. Try to focus more on holding the conversation confidently with the examiner. Which also means concentrate less on thinking is the answer right or wrong.
2. When going for COC 5, the prior experience is just Engine Cadet so the amount of knowledge and experience will naturally be limited. When answering, it’s good…[Read more] -
Admin started the topic Valves in the forum Miscellaneous 3 years, 4 months ago
INTRODUCTION TO VARIOUS VALVES
GLOBE VALVE
Introduction
Globe valve overhaulSCREW DOWN NON RETURN VALVE
Screw down non return valve working principle
Screw down non return valve overhaul -
Admin started the topic Valves in the forum Miscellaneous 3 years, 4 months ago
INTRODUCTION TO VARIOUS VALVES
GLOBE VALVE
Introduction
Globe valve overhaulSCREW DOWN NON RETURN VALVE
Screw down non return valve working principle
Screw down non return valve overhaul -
icedcappucino started the topic Guide to Electrical Insulation Testing in the forum Electrotech 3 years, 4 months ago
Meggar test to insulation test
WHAT IS “Good” insulation?
Every electric wire in your plant – whether it’s in a motor, generator, cable, switch, transformer, etc. – is carefully covered with some form of electrical insulation. The wire itself is usually copper or aluminum, which is known to be a good conductor of the electric current that powe…[Read more] -
icedcappucino started the topic Resume writing in the forum Shore Transitions 3 years, 5 months ago
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icedcappucino replied to the topic COC 5 (Engine) Oral Questions in the forum COC (Engine) past oral questions 3 years, 5 months ago
Updated with 2022 questions
Unknown examiner (Motor)
– Bilge system: Assignment 008
Draw/explain system
Explain normal operation
Explain Abnormal operation (water rising above bilge wells)
Explain Emergency bilge sea suction
SOLAS requirements for such valve.
Which MARPOL Annex falls under?
Explain/draw Non-return globe valve
Function of compound…[Read more] -
icedcappucino started the topic L.O analysis in the forum Fuel Oil, Lub Oil and Water Treatment 3 years, 5 months ago
Given below is a medium speed trunk type main engine oil analysis report. With reference to each parameter of this report:
• Is there sufficient additive reserve in circulation oil to protect the engine?
• Analyze the condition of this oil from used oil test results for each parameter by comparing with SAE 30 New oil.
• Discuss the effect of conti…[Read more] -
icedcappucino started the topic Enhanced Survey Programme in the forum Marine Legislations and Surveys 3 years, 5 months ago
Lloyd’s Register ESP for Bulk Carriers Preparation for Special Survey
For the purpose of this post, we’ll focus on double skin bulk carriers:
Definitions:
1. Overall survey: Intended to report on overall condition…[Read more] -
Admin started the topic Transom stern construction in the forum Drawings 3 years, 5 months ago
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Admin started the topic Fore end construction in the forum Drawings 3 years, 5 months ago
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Admin started the topic Double bottom construction in the forum Drawings 3 years, 5 months ago
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Admin started the topic General cargo ship midship cross section in the forum Drawings 3 years, 5 months ago
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Admin started the topic Explosion proof protection concepts in the forum Marine Legislation 3 years, 5 months ago
EX D FLAMEPROOF
Ex d or Flameproof means that an enclosure or junction box is manufactured and certified as explosion proof according to explosion protection concepts.The Flameproof classification is a type of protection in which the parts that can ignite in an explosive atmosphere are placed within an enclosure that can withstand the force…[Read more]
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Admin started the topic Bulk carrier midship cross section in the forum Drawings 3 years, 5 months ago
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Admin started the topic Hatch cover maintenance for bulk carrier in the forum Deck equipment 3 years, 5 months ago
Q4: Which of the following is a description of the function of periphery cleats around a hatch cover?
A: They provide horizontal restraint, control the cross-joint seal compression and ensure the edges of the hatch cover panels at the cross joint remain firmly pressed or held together and that the cross joint seal rubber remains properly…[Read more] -
icedcappucino replied to the topic COC 1 (Engine) Oral Questions in the forum COC (Engine) past oral questions 3 years, 5 months ago
Updated masterlist with 2022 questions
07/09/2022
Zahir (7 Sep 2022)1. Your ship is in maneuvering condition & your Aux. Blower tripped. It’s not mechanical or electrical problem. What you check & how to solve
2. ESP 15 year bulk carrier
3. Draw a piston, how to overhaul & what to check in a standby piston…
4. Boiler Manhole door top & plan…[Read more] - Load More
