How safety vv brings down pressure less than set pressure using springs for lifting vv ?

Difference between safety vv & relief valve.

In sailing while using ege no water in boiler. what actions to take ?

After gauge glass broken how steel ball prevents water coming out ?

How we calculate co2 bottles required for e / are ?

Draw fire main liine. purpose of deck isolating valve.its location ?

How we know the nox emissions are in within limit. do we measure it or what ?

Explain oil spill occurred during bunkering when vessel at anchoring & what actions taken ?

Types of stp ?

How untreated sewage discharged onboard ?

Explain annex iv ?

What is collision bulkhead , details , how pipe line pass through it ?

If camshaft of one unit is worn out , what to be done ?

Explain boiler priming and reasons ?

Refrigeration plant draw and explain ?

What is galvanic corrosion explain fouling of ships hull whta are the disadvantages ?

What is generator paralleling , methods used ?

Explain generator safeties , types of fuses , rating of fuses ?

Explain ire triangle , co2 system , entry checks b4 co2 room ventilation ?

Explain ballast water management , annex 4 ?

What is electrical relief v / v.why it is called so ?

What is intrinsifically safe ? where it is used ?

How can you replace that ammeter without isolating electrical line ?

What is the function of ct transformer ? where are they used ?

After reducing the voltage where we have to supply that voltage ?

What is step down transformer and what they do ?

How many types of transformer we use onboard ? what are they ?

What is main purpose for dol starter ?

How can you practically control the speed of bow thruster motor ?

What type of motor we use in bow thruster ?