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Pipe & Cistern
Question Bank: Pipe & Cistern
Time & Work
Question Bank: Time & Work
TIME AND WORK
Verbal & Non verbal Chapter 2 : Time and work

1.Time and work: If A can do a piece of work in n days, then A’s 1 day’s work = 1/n 2.   Days from Work:If A’s 1 day’s work = 1/n then A can finish the work in n days  3. Ratio:If A is thrice as good a workman as B, then:Ratio of work done by A and B […]
Verbal & Non verbal Chapter – 7 : Pipes and cisterns

Introduction : Pipes and cisterns SAMPLE PROBLEMS 1. A tank is filled in 5 hours by three pipes A, B and C. The pipe C is twice as fast as B and B is twice as fast as A. How much time will pipe A alone take to fill the tank? a. 20 hoursb. 25 […]
Psychology Chapter – 1 : Introduction

Subject Overview Why the Psychometric test was included in the Merchant Navy? When you are flying a Plane or you are fighting a war, you need to make decisions in a split of seconds. . Most importantly, at your decisions rest lives of people. In Shipping, with advancement in technology, you have RADARS installed in […]
MEK – 4 : Workshop technology

Introduction: Workshop technology Types of hammers- Types of chisels- Types of screw drivers- Types of files- Types of punches- Bench vice- these are work holding devices which are mounted onto the tops of work benches. They are used to hold work pieces whilst carrying out operations like filling, sawing, bending etc. Hacksaws- these are used […]
Question Bank: Time, speed, and distance
Question Bank: Time, speed, and distance
Verbal & Non verbal Chapter - 1 : Time, speed and distance
Verbal & Non verbal Chapter – 1 : Time, speed and distance

Introduction : Time, speed and distance 1 km/hr to m/sec conversion: 2. relative speed of a moving body with the speed x km/h in relation to the other moving body with speed of y km/h:(a)in same direction is the difference of their speed (x-y) km/h.(b) in opposite direction  is the sum of their speed (x+y) […]

CASE STUDIES

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Recent Surge in Maritime Attacks by Pirates in the Arabian Sea
Recent Surge in Maritime Attacks by Pirates in the Arabian Sea

Introduction The Arabian Sea, a vital maritime route connecting the Indian Ocean to the Persian Gulf, has recently witnessed a disturbing surge in pirate attacks, threatening the safety and security of global shipping lanes. This increase in maritime piracy has raised concerns among nations, international organizations, and the shipping industry, prompting a reevaluation of security […]
UK MAIB - Improper Mooring Arrangement Led to Chief Mate's Death
UK MAIB – Improper Mooring Arrangement Led to Chief Mate’s Death

The UK MAIB has published a report on the death of a chief officer who was struck in the head by a tensioned mooring line aboard a bulker in 2021, finding that a short-handed operation and an unfamiliarity with the mooring arrangement contributed to his death.

Explosion Caused By Fumigation - Case Study
Explosion Caused By Fumigation – Case Study

The hatch covers had shifted somewhat, and blue-grey smoke could be seen pouring from beneath the edges, according to the crew. A third explosion occurred about an hour later in a second hold, and a fourth occurred a few minutes afterward. Shortly later, explosions erupted in the other holds.