SOME FREQ. ASKING QNS WITH ANSWERS COMPONENT WISE

WHAT DO YOU MEAN BY PRIMING OF PUMPS?

Ø  THE PUMP SHOULD BE FULL OF LIQUID BETWEEN SUCTION VALVE AND DESACHRGE VALVE AND ANY AIR IN THE PUMP SHOULD BE PURGED THROUGH VENTING PUMP

WHAT IS AN EDUCTOR? WHAT IS IT’S USE ONBOARD?

Ø  AN EDUCTOR IS A NON MECHANICAL PUMP WHICH CONSISTS OF WATER JETS SUPPLIED FROM SOME HIGH PRESSURED PUMP DISCHARGING INTO SUCTION CHAMBER WHICHN IS CONNECTED TO A SUCTION LINE.THE HIGH PRESSURE JET DISCHARGED FROM THE NOZZLE ENTRANCE

WHAT ARE THE CLASSES OF FIRE?

Ø  CLASS A-CARBONACEOUS MATERIALS(WOOD,PAPER,ETC)

            CLASS B -LIQUID FIRE,OIL FIRE

            CLASS C-GASEOUS FIRE,ELECTRICAL FIRE

            CLASS D-METALLIC FIRE(MAGNESIUM, POTASSIUM)

WHAT ARE THE CAUSES OF FIRE IN E/R?

Ø  FREE AIR FLAMMABLE MATERIALS ARE REDILY AVAILABLE IN THE E/R ONLY HEAT IS REQURED WHICH CAN BE GENERATED BY

        i.            ELECTRIC SPARK

      ii.            LEAKAGE OF EXHAUST GASES

    iii.            SPONTANEOUS COMBUSTION

    iv.            FRICTION(OVERHEATING OF MOVING PARTS)

      v.            RADIATIONS(VALVE,HOT PIPE)

    vi.            PORTABLE LIGHTS

  vii.            HOT WORKS SUCH AS WELDING,GRINDING,DRILLING,CUTTING,ETC(FLAMMABLE SIBSTANCES SUCH AS L.O.F.O,E/R WASTE,OIL FUMES,PAINTS ETC)

WHAT CLASSES OF FIRE MAY OCCUR IN E/R?

Ø  CLASS B AND CLASS C FIRES.

WHAT ACTION WILL YOU TAKE INCASE OF FIRE IN THE E/R?

Ø  DUTY ENGINEER,NFORM BRIDGE AND RUN TO THE FIRE STATION IF FIRE IS UNCONTROLABLE

            IF SMALL FIRE EXTINGUISH FORE WITH APPROPRIATE FIRE EXTINGUISHER

WHERE AREFIRE HOSES LOCATED IN THE E/R?

Ø  ON THE BOTTOM PLATFORM 2 NOS(ONE PORT SIDE-ONE STBD SIDE),INFIRE HOSE BOXES NEAR THE FIRE HYDRANT AND ONE ON TOP PLATFORM AS FITTED AS PER SHIP’S FIRE PLAN

WHAT IS INTERNATIONAL SHORE COUPLING?

Ø  IT IS A COUPLING THAT MATCH WITH ANY SHORE CONNECTION WHEN THE SHIP IS IN ANY PORT/DRY DOCK TO LAKE SHOR WATER SUPPLY AND CONNECT IT TO SHIOP’S FIRE LINE

WHEN EILL YOU USE CO ₂ EXTINGUISHER IN E/R?

Ø  WHEN THERE IS AN ELECTRICAL FIRE IN THE E/R

WHEN DO WE USE FIXED FIRE FIGHTING APPLIANCE?

Ø  WHEN FIRE CANNOT BE PUT OFF WITH PORTABLE EXTINGUISHERS WHEN CO ₂ FLOODING IS OPERATED .

WHO OPERATES FIXED FIRE FIGHTING APPLIANCE?

Ø  CHIEF ENGINEER IS SOLELY RESPONSIBLE AND IT IS HE WHO DECIDES TO USE THE CO₂ FLODING SYSTEM.

WHAT DO YOU MEAN BY CO2 SYSTEM/

Ø  CO2 SYSTEM IS AFIXED FIRE FIGHTING SYSTEM USED IN CASE OF MAJOR FIRE AND IT IS MEANT TO FLOOD THE ENGINE ROOM IN ONE SHORT AFTER THE ENGINE ROOM PERSONNEL ARE OUTAND ALLTHE VENTALLATION AND OPENINGS ARE SEALED.

HOW WILL YOU FIGHT THE ELECTRICAL FIRE IN THE ENGINE ROOM?

Ø  SHUT OFF SUPPLY TO THE CIRCUIT AND FIGHT FIRE WITH PORTABLE D.C.P CO2 CYLINDER.

WHEN WILL YOU USE WATER TYPE EXTINGUISHER?

Ø  ON ‘A’ CLASS FIRE.

WHAT IS A SMOKE HELMET ? WHEN WILL YOU USE IT?

Ø  IT IS A FIRE PROOF HELMET WITH LIGHTING ARRANGEMENT AND IT IS USED TO FIGHT FIRE IN A SMOKY ATMOSPHERE.

WHEN WILL YOU USE A D.C.P EXTINGUISHER?

Ø  TO BE USED ON CLASS A, CLASS C AND ELECTRICAL FIRE.

WHAT ARE THE SOURCES OF ELECTRICITY ON BOARD?

Ø  MAIN GENERATOR, EMERGENCY GENERATOR AND BATTERY PACK.

  DEFINE CONDUCTOR?

Ø  SUBSTANCES WHICH ALLOW THE FLOW OF CURRENT THROUGH IT.

DEFINE INSULATORS?

Ø  SUBSTANCES WHICH DOES NOT ALLOW THE FLOW OF ELECTRICITY THROUGH IT. Eg- RUBBER , MICA, PAPER, WOOD ETC.

WHAT IS IMPORTANCE OF EMERGENCY GENERATOR ON BOARD AND WHERE IT IS FITTED?

Ø  IN THE EVENT OF MAIN GENERATOR FAILURE/ BLACK OUT, EMERGENCY GENERATOR CAUSES LOAD AUTOMATICALLY AND GIVES ESSENTIAL SUPPLY FOR NAVIGATIONAL EQUIPMENTS, LIGHTING. IT IS SITUATED OUTSIDE THE E/R.

STATE VARIOUS DANGERS ASSOCIATION WITH ELECTRICAL INSTALLATIONS?

Ø  SHORT CIRCUIT – DUE TO LOOSE CONNECTIONS AND OVER HEATING.               SINGLE PHASING- DUE TO OVER LOADING,IMPROPER USING, IMPROPER EARTHING,IMPROPER MCB, LOOSE CONNECTIONS.