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icedcappucino replied to the topic Switchboard safeties in the forum Electrotech 2 years, 6 months ago
MSB Safeties
Minimum 3mm rubber mat (approved and certified) in front as well as back of switchboard.
Dead front-end switchboard.
Insulated door handles (Ebonite)
Panel doors are also earthed.
Can’t open door, if breaker is closed.
No pipeline to pass in vicinity.
Minimum 1m free air surrounding switchboard.
Short circuit protection (ACB g…[Read more] -
icedcappucino started the topic Power Factor in the forum Electrotech 2 years, 6 months ago
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Shanashok became a registered member 2 years, 6 months ago
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Chauncey Teague became a registered member 2 years, 6 months ago
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icedcappucino started the topic Thermostatic Expansion Valve in the forum Air/Con & Refrigeration 2 years, 6 months ago
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icedcappucino started the topic Boiler caustic embrittlement in the forum Boilers 2 years, 6 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 2 years, 6 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 2 years, 6 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] -
Balling McWilliams became a registered member 2 years, 6 months ago
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Admin started the topic Valves in the forum Miscellaneous 2 years, 6 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 2 years, 6 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 -
DominicsoommongelymnBB became a registered member 2 years, 6 months ago
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icedcappucino started the topic Guide to Electrical Insulation Testing in the forum Electrotech 2 years, 6 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] -
JamesdobQG became a registered member 2 years, 6 months ago
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LPSH became a registered member 2 years, 6 months ago
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SvetlanaekaQC became a registered member 2 years, 6 months ago
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icedcappucino started the topic Resume writing in the forum Shore Transitions 2 years, 7 months ago
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icedcappucino replied to the topic COC 5 (Engine) Oral Questions in the forum COC (Engine) past oral questions 2 years, 7 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] -
Nash Heller became a registered member 2 years, 7 months ago
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Teamswoosh became a registered member 2 years, 7 months ago
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